73 results about "Annealing (metallurgy)" patented technology

The invention belongs to the technical field of metallurgy and particularly relates to a method for preparing a developed {100} texture non-oriented silicon steel thin belt based on thin belt continuous casting. The method is performed according to the following steps that firstly, molten steel is smelted according to the set components, and the components comprise, by weight percentage, 0.01-0.05% of C, 1.5-3.0% of Si, 0.2-0.3% of Mn, smaller than or equal to 0.005% of Al, 0.01-0.04% of V, 0.002-0.005% of S and the balance Fe and inevitable impurities; secondly, a cast belt is formed after the thin belt continuous casting process; thirdly, hot rolling is performed under the inert atmosphere condition; fourthly, scale is removed in a pickling manner, and then single-stage or two-stage cold rolling is performed; and sixthly, two-stage re-crystallization annealing is performed, an insulating coating is coated and dried, and high-performance non-oriented silicon steel is obtained. According to the method for preparing the developed {100} texture non-oriented silicon steel thin belt based on thin belt continuous casting, on the basis of partially utilizing the inherited effect of a {100} texture in an initial solidifying structure, the driving force is provided by means of a subsequent decarburization phase change, it is promoted that a developed {100} texture is formed in a finished product plate, and therefore the high-performance non-oriented silicon steel is obtained.

The invention belongs to the metallurgy field and relates to a production process of a steel wire rod, particularly the steel wire rod for an annealing-free solder wire and a production process of the steel wire rod, wherein the steel wire rod comprises elements in weight percentage as follows: 0.07-0.1% of C, 1.25-1.4% of Mn, 0.4-0.6% of Si, less than or equal to 0.02% of P, less than or equal to 0.02% of S, 0.2-0.55% of Mo, 0.5-1.0% of Ni, less than or equal to 0.2% of Cu, less than or equal to 0.2% of Ti and less than or equal to 0.1% of Al with the balance of Fe. The process comprises steps of detecting a blank, heating the steel blank, descaling by high-pressure water, roughly and intermediately rolling, pre-finishing rolling, cooling in a first section by water, finishing rolling bya unit, cooling in a second section by water, diameter reducing and sizing rolling, cooling in a third section by water, spinning, cooling by wind, finishing and delivering to a warehouse. The methodof the invention employs a rolling-controlled and cooling-controlled process to execute process control of the steel wire rod of the solder wire to obtain an F+P tissue appropriate to draw, and has advantages as follows: good comprehensive mechanical property is realized, a solder wire factory can avoid annealing and perform multi-pass drawing without wire breakage, the production efficiency is greatly increased and the production cost is reduced at the same time.

The invention relates to a manufacturing process of an automobile low-alloy high-strength steel cold-rolled sheet with high product of strength and elongation, and belongs to the technical field of metallurgy. The technical scheme of the invention is as follows: the manufacturing process comprises a smelting process, a hot rolling process and a cold rolling process, wherein in the cold rolling process, the annealing temperature control is as follows: the soaking temperature is 840-860 DEG C, the slow cooling temperature is 670-700 DEG C, the rapid cooling temperature is 410-430 DEG C, and the aging finish temperature is 350-370 DEG C; and according to strip steel of different thickness specifications, different annealing tape speed target values are planed: the tape speed of the strip steel of 0.8mm specification is 205m / min, the tape speed of the strip steel of 1.0mm specification is 165m / min, the tape speed of the strip steel of 1.2mm specification is 137m / min, the tape speed of the strip steel of 1.5mm specification is 110m / min, the tape speed of the strip steel of 1.8mm specification is 92m / min, the tape speed of the strip steel of 2.0mm specification is 82m / min, and the tape speed of the strip steel of 2.5mm specification is 66m / min. The manufacturing process of the automobile low-alloy high-strength steel cold-rolled sheet with the high product of strength and elongation disclosed by the invention has the beneficial effects that the low-alloy high-strength steel cold-rolled sheet with high product of strength and elongation is produced by modifying the chemical elements and optimizing the hot rolling and cold rolling processes so that the product of strength and elongation of the low-alloy high-strength steel cold-rolled sheet reach 15GPa%, and simultaneously the quality is stably controlled.

The invention discloses deformable low-expansion Mg-Zr alloy. The alloy has low linear expansion coefficient and good plastic machinability. By combining a powder metallurgy manner with a high-temperature annealing process, the novel low-expansion and deformable-machineable Mg-Zr alloy with compact tissues and uniform components can be synthesized. The content of Zr in a magnesium alloy matrix reaches up to 35wt%-45wt%, when the magnesium alloy matrix is heated / cooled in a temperature range of 0-300 DEG C, the linear expansion coefficient of the alloy is 12.6*10<6>%-14.8*10<6>%. Meanwhile, theroom-temperature mechanical property of the alloy material is good, the extension strength is 224.1MPa-248.5MPa, and the elongation rate is 13.0%-15.6%.