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69results about How to "Avoid center crack" patented technology

Device and method for improving casting blank quality of continuous casting production

The invention discloses a device and method for improving casting blank quality of continuous casting production. The device comprises a plurality of casting-rolling mill racks arranged in the casting strand direction, an electromagnetic linear period symmetric stirring unit and a drive adjustment type secondary cooling water control unit. The casting-rolling mill racks are used for artificially and forcibly forming solidification tail ends and arranged on a casting strand horizontal area. The electromagnetic linear period symmetric stirring unit is arranged on a casting strand arc area. The drive adjustment type secondary cooling water control unit is used for conducting stepless water spraying cooling on the surfaces of casting blanks based on real-time measuring. The liquid core large-rolling-reduction casting-rolling device and technology used for artificially and forcibly forming the solidification tail ends form the large rolling reduction in the thickness direction of the casting blanks, so that the solidification tail ends are artificially and forcibly formed inside the casting blanks, conditions for forming defects in the natural solidification process of the casting blanks are terminated, flowing of solute element molten steel enriched in the casting blanks is prevented, and the effects of homogenizing and density inside the casting blanks are improved.
Owner:CHINA NAT HEAVY MACHINERY RES INSTCO

Vanadium-titanium-nitrogen-containing atmospheric-corrosion-resistant molten steel, atmospheric-corrosion-resistant steel and production method of atmospheric-corrosion-resistant steel

The invention relates to the steel making field, and particularly provides atmospheric-corrosion-resistant molten steel. Based on the total weight of the molten steel, the molten steel comprises 0.01-0.09% of C, 0.15-0.35% of Si, 0.30-0.60% of Mn, 0.30-0.40% of Cu, 0.20-0.30% of Ni, 2.0-3.5% of Cr, 0.16-0.20% of V, 0.005-0.030% of Ti, 0.004-0.008% of N, less than or equal to 0.030% of P and less than or equal to 0.020% of S. The invention also provides atmospheric-corrosion-resistant steel and a production method thereof. When the molten steel is adopted for continuous casting, the center quality of casting blanks can be improved, center cracks and center line shrinkage are prevented, accordingly, the quality of the high strength and high atmospheric corrosion resistance steel casting blanks can be improved, and the qualification rate of the casting blanks can be improved to a great extent; and the finally obtained atmospheric-corrosion-resistant steel has good atmospheric corrosion resistance and higher strength performance.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Production method applicable to directly installing and heating low-alloy high-strength structural steel plate billet

The invention discloses a production method applicable to directly installing and heating a low-alloy high-strength structural steel plate billet. According to the method, high-quality, low-alloy andhigh-strength structural steel (Q500D, Q500E and Q500F) continuous casting plate billet produced by performing a cast billet structure adjusting and controlling technology, a soft press technology with the solidification tail end position uncertain and a hot roller seam remanufacturing technology under heavy reduction of the front end is adopted on an existing continuous casting machine, after continuous casting of the plate billet, direct furnace containing and heating rolling is performed, small component segregation of the plate billet can shorten the component homogenization time of the plate billet in a furnace, and therefore the plate billet heating time is shortened, and the direct installing and heating requirement of the plate billet is met; and due to expanding of an equiaxed zone in the plate billet, agglomeration and segregation of inclusions and components at a 1 / 2 thickness position are reduced, and a produced steel plate is uniform in performance.
Owner:HEBEI PUYANG IRON & STEEL

Vanadium-nitrogen-containing atmospheric-corrosion-resistant molten steel, atmospheric-corrosion-resistant steel and production method of atmospheric-corrosion-resistant steel

The invention relates to the steel making field, and particularly provides atmospheric-corrosion-resistant molten steel. Based on the total weight of the molten steel, the molten steel comprises 0.01-0.09% of C, 0.15-0.35% of Si, 0.30-0.60% of Mn, 0.30-0.40% of Cu, 0.20-0.30% of Ni, 2.0-3.5% of Cr, 0.13-0.15% of V, 0.005-0.030% of Ti, 0.004-0.008% of N, less than or equal to 0.030% of P and less than or equal to 0.020% of S. The invention also provides atmospheric-corrosion-resistant steel and a production method thereof. When the molten steel is adopted for continuous casting, the center quality of casting blanks can be improved, center cracks and center line shrinkage are prevented, accordingly, the quality of the high strength and high atmospheric corrosion resistance steel casting blanks can be improved, and the qualification rate of the casting blanks can be improved to a great extent; and the finally obtained atmospheric-corrosion-resistant steel has good atmospheric corrosion resistance and higher strength performance.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Atmosphere corrosion resisting molten profile steel, atmosphere corrosion resisting vanadium-titanium-nitrogen-containing profile steel and production method of atmosphere corrosion resisting vanadium-titanium-nitrogen-containing profile steel

The invention relates to the field of steelmaking and particularly provides atmosphere corrosion resisting molten profile steel. Based on the total weight, the molten profile steel contains 0.01% to 0.09% of C, 0.15% to 0.35% of Si, 0.30% to 0.60% of Mn, 0.30% to 0.40% of Cu, 0.20% to 0.30% of Ni, 3.5% to 5% of Cr, 0.16% to 0.20% of V, 0.005% to 0.030% of Ti, 0.004% to 0.008% of N, not larger than 0.030% of P and not larger than 0.020% of S. The invention provides atmosphere corrosion resisting profile steel and a production method thereof. By adopting the molten profile steel provided by the invention for continuous casting, the center quality of an ingot can be improved, and generation of center cracks and center line shrinkage can be avoided, so the quality of high-strength high-atmosphere-corrosion-resistance type profile steel ingot can be improved, the percent of pass of the ingot can be greatly increased, and moreover the finally-obtained atmosphere corrosion resisting profile steel is good in atmosphere corrosion resistance and higher in strength property.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Niobium-nitrogen-containing atmospheric corrosion-resistant molten structural steel, atmospheric corrosion-resistant structural steel and production method thereof

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 2.0%-3.5% by weight of Cr, 0.16%-0.20% by weight of V, 0.01%-0.015% by weight of Nb, 0.021%-0.030% by weight of N, less than or equal to 0.030% by weight of P, less than or equal to 0.020% by weight of S and the balance of unavoidable impurities and Fe. The invention provides atmospheric corrosion-resistant structural steel and a production method thereof. The molten steel continuous casting process improves the central quality of a casting blank, prevents central cracks and central shrinkage holes, improves the quality of the high strength and high atmospheric corrosion resistant structural steel blank and greatly improves a casting blank qualification rate. The atmospheric corrosion-resistant structural steel has good atmospheric corrosion resistance and high strength properties.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Vanadium-chromium-nitrogen-containing atmospheric corrosion-resistant molten structural steel, atmospheric corrosion-resistant structural steel and production method thereof

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 2.0%-3.5% by weight of Cr, 0.16%-0.20% by weight of V, 0.01%-0.015% by weight of Nb, 0.004%-0.008% by weight of N, less than or equal to 0.030% by weight of P and less than or equal to 0.020% by weight of S. The invention provides atmospheric corrosion-resistant steel and a production methodthereof. The molten steel continuous casting process improves the central quality of a casting blank, prevents central cracks and central shrinkage holes, improves the quality of the high strength and high atmospheric corrosion resistant structural steel casting blank and greatly improves a casting blank qualification rate. The atmospheric corrosion-resistant structural steel has good atmosphericcorrosion resistance and high strength properties.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Atmosphere corrosion resisting structural steel liquid containing chrome, vanadium and nitride, atmosphere corrosion resisting structural steel and production method of atmosphere corrosion resisting structural steel

The invention relates to the field of steel making, and particularly provides atmosphere corrosion resisting structural steel liquid. Based on the total weight of the steel liquid, the steel liquid contains 0.01%-0.09% of C, 0.15%-0.35% of Si, 0.30%-0.60% of Mn, 0.30%-0.40% of Cu, 0.20%-0.30% of Ni, 2.0%-3.5% of Cr, 0.16%-0.20% of V, 0.004%-0.008% of N, 0.030% or less of P and 0.020% or less of S. The invention provides atmosphere corrosion resisting structural steel and a production method of the atmosphere corrosion resisting structural steel. The center quality of a casting blank can be improved by adopting the steel liquid for continuous casting, center burst and center line shrinkage are avoided, accordingly, the quality of the high-strength atmosphere corrosion resisting structural steel casting blank can be improved, and the qualification rate of the casting blank can be greatly improved; and meanwhile the finally-obtained atmosphere corrosion resisting structural steel is good in atmosphere corrosion resistance and has higher strength performance.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Vanadium-containing titanium-containing atmospheric corrosion-resistant molten steel, atmospheric corrosion-resistant steel and production method thereof

The invention relates to the steel-making field, and concretely provides an atmospheric corrosion resistant structural steel liquid, which contains the following components by adopting the total weight of the steel liquid as the baseline: 0.01 percent to 0.09 percent of C, 0.15 percent to 0.35 percent of Si, 0.30 percent to 0.60 percent of Mn, 0.30 percent to 0.40 percent of Cu, 0.20 percent to 0.30 percent of Ni, 2.0 percent to 3.5 percent of Cr, 0.06 percent to 0.12 percent of V, 0.005 percent to 0.030 percent of Ti, 0.008 percent to 0.014 percent of M, less than or equal to 0.030 percent of P, and less than or equal to 0.020 percent of S. The invention provides atmospheric corrosion resistant structural steel, and a production method thereof. By adopting the steel liquid provided by the invention for continuous casting, the central quality of a casting blank can be improved, and the occurrence of center burst and center line shrinkage is avoided, so that the quality of a high atmospheric corrosion resistant structural steel casting blank with high strength can be improved, and the yield of the casting blank can be greatly improved; and in addition, the finally obtained atmospheric corrosion resistant structural steel has good atmospheric corrosion resistance and a higher strength performance.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Vanadium-nitrogen-containing atmospheric corrosion-resistant molten structural steel, atmospheric corrosion-resistant structural steel and production method thereof

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 2.0%-3.5% by weight of Cr, 0.13%-0.15% by weight of V, 0.01%-0.015% by weight of Nb, 0.005%-0.030% by weight of Ti, 0.004%-0.008% by weight of N, less than or equal to 0.030% by weight of P and less than or equal to 0.020% by weight of S. The invention provides atmospheric corrosion-resistant structural steel and a production method thereof. The molten steel continuous casting process improves the central quality of a casting blank, prevents central cracks and central shrinkage holes, improves the quality of the high strength and high atmospheric corrosion resistant structural steel blank and greatly improves a casting blank qualification rate. The atmospheric corrosion-resistant molten structural steel has good atmospheric corrosion resistance and high strength properties.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Method for producing constructional steel plate blank suitable for direct mounting and heating and high-strength ship

InactiveCN108788055AAvoid center crackGuarantee the safety of the casting machineSteel platesHeating time
The invention discloses a method for producing a constructional steel plate blank suitable for direct mounting and heating and a high-strength ship. According to the method, a constructional steel (A36, D36 and E36) continuous plate blank for the high-quality high-strength ship is produced on an existing continuous casting machine through the casting blank structure regulating and controlling technology, the solidification tail end position indetermination light reduction technology and the hot roll gap rebuilding technology in a front end high reduction manner, the plate blank is directly subjected to direct furnace loading heating rolling after being subjected to continuous casting, the in-furnace ingredient balancing time of the plate blank can be shortened through small ingredient segregation of the plate blank, and therefore the plate blank heating time is shortened, and the direct mounting heating requirement of the plate blank is met. Indetermination and segregation of occludedforeign substances and ingredients at the 1 / 2 thickness are reduced through expansion of an equiaxed zone in the plate blank, and a produced steel plate is even in performance.
Owner:HEBEI PUYANG IRON & STEEL

Atmospheric corrosion-resistant molten structural steel, niobium-nitrogen-containing atmospheric corrosion-resistant structural steel and production method thereof

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 3.5%-5.0% by weight of Cr, 0.16%-0.20% by weight of V, 0.01%-0.015% by weight of Nb, 0.021%-0.030% by weight of N, less than or equal to 0.030% by weight of P, less than or equal to 0.020% by weight of S and the balance of unavoidable impurities and Fe. The invention provides atmospheric corrosion-resistant structural steel and a production method thereof. The molten steel continuous casting process improves the central quality of a casting blank, prevents central cracks and central shrinkage holes, improves the quality of the high strength and high atmospheric corrosion resistant structural steel blank and greatly improves a casting blank qualification rate. The atmospheric corrosion-resistant structural steel has good atmospheric corrosion resistance and high strength properties.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Molten steel of atmospheric corrosion resistant steel and chromium-nitrogen containing atmospheric corrosion resistant steel and production method thereof

The invention relates to the field of steel making, and specifically provides molten steel of atmospheric corrosion resistant steel. Based on total weight of the molten steel, the molten steel comprises the following components in percentage by weight: 0.01%-0.09% of C, 0.15%-0.35% of Si, 0.30%-0.60% of Mn, 0.30%-0.40% of Cu, 0.20%-0.30% of Ni, 3.5%-5.0% of Cr, 0.13%-0.15% of V, 0.004%-0.008% of N, not greater than 0.030% of P and not greater than 0.020% of S. The invention provides atmospheric corrosion resistant steel and a production method thereof. The molten steel can be continuously cast to improve central quality of casting blank, and central cracks and central pore shrinkage are avoided, so that quality of high-strength atmospheric corrosion resistant steel casting blank can be improved, and the qualification rate of casting blank can be greatly increased; and moreover, the finally obtained atmospheric corrosion resistant steel is good in atmospheric corrosion resistance, and has higher strength performance.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Production method suitable for directly charged and heated plate slab for high-rise building structure

InactiveCN108788053AAvoid center crackGuarantee the safety of the casting machineSteel platesHeating time
The invention discloses a production method suitable for a directly charged and heated plate slab for a high-rise building structure. The method comprises the steps of continuously casting a slab by adopting high quality high-rise building structural steel (Q345GJB, Q345GJC, Q345GJD and Q345GJE) produced by means of a front end large reduction casting blank tissue regulating technique, a solidification end position indeterminate light reduction technique and a hot roll gap reconstructive technique based on an existing continuous casting machine and directly charging a furnace to be heated androlled after continuous casting the slab, wherein the heterogeneous component time of the slab in the furnace can be shortened as a result of relative small composition segregation of the slab, so that the slab heating time is shortened then and the demand on direct charging and heating the slab is met. Agglomeration and segregation of occluded foreign substances and components at 1 / 2 thickness are reduced as an isometric crystal region in the slab is expanded, and the produced steel plate is uniform in performance.
Owner:HEBEI PUYANG IRON & STEEL

Production method suitable for direct charging and heating of steel plate blank for medium temperature pressure vessel

InactiveCN108788044AAvoid center crackGuarantee the safety of the casting machineSteel platesHeating time
The invention discloses a production method suitable for direct charging and heating of a steel plate blank for a medium temperature pressure vessel. The method is characterized in that a high-qualitysteel (14Cr1MoR) for the pressure container produced through a casting billet structure regulation technology, a solidification end position indetermination soft-reduction technology and a hot rollergap re-manufacturing technology under front end heavy reduction is adopted on an existing continuous casting machine for continuously casting the plate blank, the plate blank is continuously casted,and then is directly charged, heated and rolled, the small composition segregation of the plate blank can reduce the plate blank homogenization time in a furnace, the plate blank heating time can be reduced, the plate blank direct charging and heating needs are met, expansion of the equiaxed crystal area in the plate blank reduces agglomeration and segregation of inclusions and components on the 1 / 2 thickness, and the produced steel plate is uniform in property.
Owner:中普(邯郸)钢铁有限公司

Atmospheric corrosion-resistant molten structural steel, vanadium-titanium-containing atmospheric corrosion-resistant structural steel and production method thereof

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 3.5%-5.0% by weight of Cr, 0.16%-0.20% by weight of V, 0.01%-0.015% by weight of Nb, 0.005%-0.030% by weight of Ti, 0.004%-0.008% by weight of N, less than or equal to 0.030% by weight of P and less than or equal to 0.020% by weight of S. The invention provides atmospheric corrosion-resistant structural steel and a production method thereof. The molten steel continuous casting process improves the central quality of a casting blank, prevents central cracks and central shrinkage holes, improves the quality of the high strength and high atmospheric corrosion resistant structural steel blank and greatly improves a casting blank qualification rate. The atmospheric corrosion-resistant structural steel has good atmospheric corrosion resistance and high strength properties.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Atmospheric corrosion-resistant molten structural steel and chromium-vanadium-containing atmospheric corrosion-resistant structural steel and production method thereof

The invention relates to the field of steel making and provides atmospheric corrosion-resistant molten structural steel. The molten structural steel is composed of 0.01%-0.09% by weight of C, 0.15%-0.35% by weight of Si, 0.30%-0.60% by weight of Mn, 0.30%-0.40% by weight of Cu, 0.20%-0.30% by weight of Ni, 3.5%-5.0% by weight of Cr, 0.16%-0.20% by weight of V, 0.021%-0.030% by weight of N, less than or equal to 0.030% of P, less than or equal to 0.020% of S and the balance of inescapable impurities and Fe. The invention provides atmospheric corrosion-resistant structural steel and a productionmethod thereof. Through continuous casting of molten steel, the central quality of a casting blank is improved, central cracks and central shrinkage cavity are avoided, the quality of the high strength and high atmospheric corrosion resistant structural steel blank is improved, a casting blank qualification rate is greatly improved and good atmospheric corrosion resistance and high strength of the atmospheric corrosion-resistant structural steel are obtained.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Atmospheric-corrosion-resistant molten steel, chromium-vanadium-titanium-containing atmospheric-corrosion-resistant steel and production method of atmospheric-corrosion-resistant steel

The invention relates to the steel making field, and particularly provides atmospheric-corrosion-resistant molten steel. Based on the total weight of the molten steel, the molten steel comprises 0.01-0.09% of C, 0.15-0.35% of Si, 0.30-0.60% of Mn, 0.30-0.40% of Cu, 0.20-0.30% of Ni, 3.5-5.0% of Cr, 0.16-0.20% of V, 0.005-0.030% of Ti, 0.021-0.030% of N, less than or equal to 0.030% of P and less than or equal to 0.020% of S. The invention also provides atmospheric-corrosion-resistant steel and a production method thereof. When the molten steel is adopted for continuous casting, the center quality of casting blanks can be improved, center cracks and center line shrinkage are prevented, accordingly, the quality of the high strength and high atmospheric corrosion resistance steel casting blanks can be improved, and the qualification rate of the casting blanks can be improved to a great extent; and the finally obtained atmospheric-corrosion-resistant steel has good atmospheric corrosion resistance and higher strength performance.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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