39results about How to "Meet the forming requirements" patented technology

The invention discloses a method for superplastic forming of a TC11 titanium alloy ring with complex cross-section. The steps are as follows: heating the TC11 titanium alloy to 1030-1050°C, elongating in one direction, with a total deformation of 20%-40%, and air cooling ; Reheat to 950-980°C, repeatedly upsetting and elongating, the total deformation is 40%-65%, air cooling; then keep at 950°C for 1.5 hours, air-cooling; keep at 530°C for 6 hours, air-cooling; get fine crystal TC11 titanium alloy blank; reheated to forging temperature, through upsetting, punching, and flat height, to obtain the alloy ring blank; at a temperature of 880-900°C, rolling at a maximum feed speed of 2.0mm / s Forming to obtain TC11 titanium alloy complex section ring. The method enables the TC11 titanium alloy to be in a superplastic state during the forming process, thereby obtaining a TC11 titanium alloy complex cross-section annular part that meets requirements in performance and size. The ring is mainly used as a connecting ring, a bearing ring, etc., and is widely used in mechanical equipment in aviation, aerospace and other industrial fields.

The invention discloses a super-plasticity forming method for an LC4 aluminum alloy ring part with a complex section. The method comprises the steps that an LC4 aluminum alloy is heated to the temperature of 460+ / -10 DEG C, the temperature is kept for 2 hours, and water cooling is performed; the LC4 aluminum alloy is heated to the temperature of 380+ / -10 DEG C, the temperature is kept for 6 hours, and water cooling is performed; the alloy is heated to the temperature of 200+ / -10 DEG C, after forge deformation with deflection larger than or equal to 80%, the temperature is kept at 460+ / -10 DEG C for 30 minutes, water cooling is performed, and a crystal LC4 aluminum alloy blank is obtained; the LC4 aluminum alloy blank is rapidly rolled and formed at the maximum feed speed of 2.6 mm / s at the temperature of 480-510 DEG C, and the LC4 aluminum alloy ring part with the complex section is obtained. According to the method, the LC4 aluminum alloy can be in a super-plasticity state in the forming process, so that the LC4 aluminum alloy ring part with the complex section and both the performance and the size meeting requirements is obtained. The ring part is mainly taken as a connection ring, a bearing ring and the like to be widely applied to mechanized equipment in the industry areas such as aviation and aerospace.

The invention discloses a hot-rolled steel plate for 2000MPa grade hot stamping wheel spokes and a preparation method thereof, C: 0.37%-0.40%, Si: 0.01%-0.10%, Mn: 1.56%-1.80%, P: ≤0.010%, S: ≤0.004%, Al: 0.015%‑0.055%, Nb: 0.046‑0.060%, V: 0.041‑0.060%, Mo: 0.26‑0.35%, B: 0.0041‑0.006%, rare earth element La+Ce: 0.035% ‑0.050%, N≤0.003%, the balance is Fe and unavoidable impurities.

A high-elongation hot-rolled structure control steel with a tensile strength ≥ 800MPa, the composition and weight percentage of which are: C: 0.07-0.09%, Mn: 1.95-2.10%, Si: 0.70-0.80%, P≤0.008 %, S≤0.002%, Als: 0.02~0.04%; production method: RH vacuum furnace treatment after converter smelting; heating of cast slab; segmental rolling; segmental variable speed cooling: coiling; Under the premise of ensuring the tensile strength above 800MPa, the present invention makes the yield strength ≥ 500MPa, the elongation ≥ 25%, the strength-plastic product ≥ 20GPa%, and the yield-strength ratio < 0.65, which can meet the forming requirements of thick-gauge high-strength steel. Moreover, the alloying elements are simple, and precious alloys such as Nb, V, and Mo are not added, and the cost of the alloy can be reduced by at least 10%.

A high-elongation hot-rolled structure control steel with a tensile strength ≥ 1200MPa, the composition and weight percentage of which are: C: 0.19-0.21%, Mn: 1.60-1.80%, Si: 0.60-0.70%, P≤0.008 %, S≤0.002%, Als: 0.02%~0.04%; production method: RH vacuum furnace treatment after converter smelting; heating of billet; segmental rolling; segmental variable speed cooling: coiling; . Without adding Nb, V, Mo and other alloys, the invention can not only ensure the tensile strength above 1200MPa, but also make the elongation ≥ 15%, and the thickness of the steel plate is 7~12mm, so as to meet the forming requirements of thick gauge high strength steel. , and reduce the alloy cost by at least 10%.

The invention belongs to the technical field of forming and relates to a torsion beam preparation method which comprises the steps of pipe bending, performing, hydraulic forming and thermal treatment. The pipe is prepared from the following chemical components in parts by weight: 0.22-0.24% of C, 0.22-0.25% of Si, 1.22-1.25% of Mn, 0.005-0.008% of P, 0.001-0.002% of S, 0.030-0.049% of Al, 0.003-0.0045% of B, 0.06-0.08% of Ti, 0.05-0.10% of Cr, 0.15-0.2% of Mo, 0.15-0.2% of Ni, less than or equal to 0.05% of Cu, 0.1-0.2% of Co, and the balance of Fe. According to the invention, the pipe has good elongation in a forming state so as to meet a forming requirement; while after material forming is completed, the pipe has relatively high tensile strength through thermal treatment.

The invention discloses a continuous annealing method for 780MPa grade microalloyed dual-phase steel. The invention adopts a "U-shaped" control strategy for the heating temperature and soaking temperature, a "∩-type" control strategy for the slow cooling temperature, and a "∩" control strategy for the rapid cooling section. The segmental cooling strategy of rapid cooling Ⅰ and rapid cooling Ⅱ reduces the strength fluctuation of the product and improves the local forming performance of the product. The strength difference in the inner head of the obtained product roll does not exceed 40MPa, and the elongation after breaking is 16-23%. The hole expansion rate is not lower than 20%. The method of the invention is simple and effective, and conforms to the actual production line of a continuous annealing unit.

The invention discloses a hot-rolled steel plate for 1800MPa hot stamping wheel rims and a preparation method thereof, C: 0.33%-0.35%, Si: 0.01%-0.10%, Mn: 1.10%-1.45%, P: ≤0.010%, S: ≤0.004%, Al: 0.015%‑0.055%, Nb: 0.025‑0.040%, V: 0.02‑0.04%, Mo: 0.26‑0.35%, B: 0.002‑0.004%, rare earth element La+Ce: 0.020% ‑0.034%, N≤0.003%, the balance is Fe and unavoidable impurities.

The invention discloses a hot-rolled steel plate for 1800MPa hot stamping wheel spokes and a preparation method thereof, C: 0.34%-0.36%, Si: 0.01%-0.10%, Mn: 1.20%-1.55%, P: ≤0.010%, S: ≤0.004%, Al: 0.015%‑0.055%, Nb: 0.03‑0.045%, V: 0.031‑0.050%, Mo: 0.26‑0.35%, B: 0.002‑0.004%, rare earth element La+Ce: 0.020% ‑0.034%, N: ≤0.003%, the balance is Fe and unavoidable impurities.

The invention discloses a cylinder cover steel seal mark pressing tool. The cylinder cover steel seal mark pressing tool comprises a positioning support, a steel seal matrix supporting block, a plurality of steel seal matrixes, a pressing block and a steel seal matrix line spacing adjusting mechanism, wherein the bottom of the positioning support is fixed on the two sides of a steel seal mark partof a cylinder cover, the plurality of transversely-adjacent steel seal matrixes are fixed in the steel seal matrix supporting block side by side, the pressing block and the steel seal matrix supporting block are embedded into a notch of the positioning support, and the bottoms of the plurality of steel seal matrixes abut against the corresponding steel seal mark part to be pressed of the cylindercover; and the two sides of the lower part of the pressing block are supported in the positioning support through the steel seal matrix line spacing adjusting mechanism. The method comprises the following steps of 1) assembling the tool; and 2) sequentially pressing steel seal marks on the cylinder cover line by line. The tool is small and exquisite in structure, convenient to use and low in manufacturing cost. According to the method, the working efficiency and quality of steel seal mark pressing are greatly improved, the appearance quality of a marine diesel engine is improved, and the labor cost is reduced.