56results about How to "Improve cold working performance" patented technology

The invention relates to a method for producing ultralow-rigidity annealing-free cold forging steel. The ultralow-rigidity annealing-free cold forging steel comprises the following components in percentage by weight: 0.19%-0.22% of C, less than or equal to 0.08% of Si, 0.80%-1.00% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, more than or equal to 0.025% of Alt, 0.025%-0.050% of Ti, less than or equal to 0.035% of B and the balance of Fe and inevitable impurities. The production process comprises the following steps: smelting; continuously casting; heating; carrying out finish rolling; carrying out final rolling; slightly cooling; spinning into a ring; cooling a Stelmor roller way, wherein the heating temperature is 1090-1170 DEG C, the rolling starting temperature is 1000-1060 DEG C, the finish rolling temperature is 850-900 DEG C, the slight cooling temperature is 800-850 DEG C, the cooling speed of the Stelmor roller way is 0.10-0.40 m/s. The method disclosed by the invention can be used for reducing the usage amount of silicon and chromium, enhancing the plasticity of a product and reducing the rigidity of the steel.

The invention relates to a Ni-free super elastic Ti-based shape memory alloy and products thereof. Because of adding rare earths metal element Ce, the Ti-Zr-Nb-Fe-Al-Ce Ni-free super elastic Ti-based shape memory alloy has high erosion resistance and oxidation resistance as well as excellent welding performance, cold workability, phase-changing super elasticity, shape memory property and biocompatibility. The welding performance, the cold workability and the biocompatibility of the alloy are better than those of TiNi shape memory alloy, while the super elasticity and the shape memory property are equivalent to those of the TiNi shape memory alloy. The Ti-Zr-Nb-Fe-Al-Ce Ni-free super elastic Ti-based shape memory alloy not only can be used as biomaterial capable of being implanted in a human body for a long time, but also can be used as hyperelastic alloy manufacturing industrial products such as spectacle frame, bra support, golf club head, pipe joint, spring and drive element; moreover, the alloy has the advantages of easy processing, low cost and wide application range.

The invention relates to a corrosion-resisting ferroalloy material for a fastener and a preparation method thereof. The ferroalloy material comprises the following components in percentage by weight: 0.08-0.10% carbon, 15-15.5% manganese, 0.3-0.6% silicon, 14.5-15.0% of chromium, 0.03-0.05% of molybdenum, 0.5-1.0% of nickel, 0.03-0.05% of vanadium, 0.1-0.3% of titanium, 0.01-0.03% of zirconium, 0.01-0.03% of boron, 0.3-0.5% of copper, 0.15-0.25% of nitrogen, 0.001-0.002% of lanthanum, and the balance of iron. The ferroalloy produced by the technical scheme is a ferroalloy material with relatively high mechanical properties, wear resistance, tenacity and wear resistance.

The invention relates to Ti-Zr-Nb-Fe-Al-Ce super elastic alloy and products thereof. Because of adding appropriate amount of Fe, Al and Ce elements, the super elastic alloy has high erosion resistance and oxidation resistance as well as excellent welding performance, cold workability, phase-changing super elasticity, shape memory property and biocompatibility. The welding performance, the cold workability and the biocompatibility of the alloy are better than those of TiNi shape memory alloy, while the super elasticity and the shape memory property are equivalent to those of the TiNi shape memory alloy. The Ti-Zr-Nb-Fe-Al-Ce super elastic alloy not only can be used as biomaterial capable of being implanted in a human body for a long time, but also can be used as industrial products made from the alloy such as spectacle frame, bra support, golf club head, pipe joint, spring and drive element; moreover, the alloy has the advantages of easy processing, low cost and wide application range.

The invention relates to a method for producing a hot-rolled steel coil, which comprises the following steps of: 1) designing components, pretreating molten iron, smelting in a converter, switching nitrogen and argon, and tapping to obtain molten steel; 2) performing continuous casting on the molten steel to obtain a plate blank, wherein the content of the molten steel in a continuously cast intermediate ladle is controlled to be between 8 and 15t and the liquid level is controlled to be between 200 and 350mm when the intermediate ladle is not poured; and pouring is protected in the whole process, and the insertion depth of a long nozzle is between 300 and 400mm; 3) heating the plate blank; and 4) rolling and curling the heated plate blank. By the method, the content of C and Mn in the components of Q235q-D steel is reduced, the comprehensive performance of the Q235q-D steel is improved by appropriate rolling process and controlled cooling process, and a low-cost and high-performance Q235q-D hot-rolled steel coil is produced.

The invention relates to high-performance super-hard high-speed steel, which belongs to the field of metal materials. The high-speed steel contains w which accounts for 1.95-2.15% of total mass of the high-speed steel and Mo which accounts for 8.65-8.95% of total mass of the high-speed steel. The invention has the positive effect of improving cold and hot working properties of the high-speed steel.

The invention relates to a low-cost and high-performance SPA-H hot rolled steel coil and a preparation method thereof. The low-cost and high-performance SPA-H hot rolled steel coil comprises, by mass, 0.07%-0.095% of C, 0.25%-0.35% of Si, 0.38%-0.48% of Mn, 0.085%-0.105% of P, 0.007% of S or the less, 0.25%-0.35% of Cu, 0.08%-0.20% of Ni, 0.50%-0.60% of Cr, 0.015%-0.045% of Als and the balance Fe and inevitable impurities. The preparation method comprises the steps of composition design, hot metal pretreatment, converter smelting, ladle furnace treatment, continuous casting, hot continuous rolling, laminar cooling and reeling, and the SPA-H hot rolled steel coil is obtained. The SPA-H hot rolled steel coil has excellent plasticity and toughness, cold processing performance is improved, the problem of bending cracking of large deformation in the using process of the SPA-H steel coil is avoided, quality objections are reduced, and comprehensive performance of SPA-H steel is improved.

The invention relates to alloy powder of a core-spun yarn, and particularly relates to rare earth, niobium, vanadium, boron titanium-silicon nitride alloy powder of a core-spun yarn. The alloy powder is prepared from the following elements in mass percent: 1.0 to 2.5% of Al, 10 to 25% of N, 2.5 to 5.0% of Mn, 1.0 to 2.5% of Mg, 25 to 40% of Ti, 25 to 35% of Si, 0.5 to 1.0% of Nb, 0.5 to 1.0% of V, 0.5 to 1.0% of B, 1.0 to 2.0% of rare earth, less than or equal to 0.1% of P, less than or equal to 0.1% of S and the balance of Fe. The alloy powder is added to microalloyed steel by adopting a method of the core-spun yarn, so that the problem of low recovery rate can be solved, the consumption of ferrosilicon and ferromanganese can be reduced, and the development of titanium-silicon nitride and an alloy application of the core-spun yarn has obvious economic benefits.

The invention especially relates to a yellow opal glass material, and a preparation method and application thereof, belonging to the technical field of yellow opal glass. The yellow opal glass material comprises the following components by mass percentage: silicon dioxide, sodium oxide, potassium oxide, zinc oxide, boron oxide and calcium fluoride, with the balance being a coloring agent. The preparation method comprises the following steps: 1) melting: mixing the components and melting the mixed components into glass liquid; 2) clarification and molding: clarifying and homogenizing the glassliquid; and 3) annealing and color development: placing the homogenized glass liquid in a mold which is located at the front end of a mesh belt annealing traction furnace, subjecting the outer surfaceof the glass liquid to cooling and preliminary molding, then allowing the formed glass to enter an annealing furnace for continuous annealing under the traction of a rear-end mesh belt, and after annealing and cooling in the furnace, allowing the glass to enter a color developing and annealing furnace with precise temperature control for continuous annealing and color development. The preparationmethod of the invention realizes the continuity of production process, reduces the stress non-uniformity of the glass material, and is a stable preparation technology for the yellow opal glass material.