High malleable high wear-resisting cold process mould steel
A technology of cold work die steel and high wear resistance, applied in the field of cold work die steel, can solve the requirement of long service life that cannot meet the precision requirements of the die, the hardness, toughness and wear resistance are low, and no good mold is obtained. Co-ordination and other issues, to achieve the effect of a wide range of molds, excellent comprehensive performance, and reduced material costs
Inactive Publication Date: 2009-04-29
HEYE SPECIAL STEEL
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Problems solved by technology
After adopting such a technical scheme, its hardness reaches HRC58-62, and its impact toughness is greater than 30J. However, since the die steel does not contain W, the utilization of scrap steel resources in production is limited, the cost is high, and V, Nb , C have not been well matched, making its hardness, toughness and wear resistance slightly lower, and the overall performance is slightly worse, which is increasingly unable to meet the requirements of modern manufacturing for higher and higher mold precision and longer service life.
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[0018] Below in conjunction with specific embodiment the present invention is described in further detail:
[0019]
[0020] The smelting raw materials of steel in the embodiment are: high-speed steel, mold steel return material, industrial pure iron, ferro-tungsten, ferro-molybdenum, ferro-chrome, ferro-vanadium, ferro-niobium, etc., after 3 tons of intermediate frequency + electroslag remelting → steel ingot → fast forging , Forging machine deformation → square billet → rolling mill finished product → annealing → finishing → φ45mm round steel is the finished material.
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The present invention relates to one kind of high toughness and high wear resistance cold-work die steel, which includes C 0.95-1.15 wt%, Si 0.20-1.20 wt%, Cr 6.50-8.00 wt%, Mo 1.00-2.00 wt%, V 1.80-2.60 wt%, W 0.50-1.50 wt%, Nb 0.10-1.00 wt%, Mn 0.20-0.50 wt%, and Fe and impurity for the rest. The cold-work die steel has high wear resistance, high strength, high toughness, high hardness, high tempering stability and other features, and may be used in replacing M2 high speed die steel for lowering cost.
Description
technical field [0001] The invention relates to a cold working die steel, in particular to a high toughness and high wear resistance cold working die steel. Background technique [0002] Mold is an important means to increase productivity, reduce material consumption, reduce costs, improve product quality and market competitiveness. With the continuous development of industrial technology, molds are required to be used under harsher and higher-speed working conditions, and molds are required to have higher precision and longer service life. At present, the domestic mold steel has reached about 400,000 tons, but due to reasons such as variety and quality, the domestic mold steel cannot meet the requirements, and a large amount of imported foreign mold steel is about 80,000 tons per year. The production and use of new steel types and varieties are very small, accounting for only 2 to 3% of the annual production of die steel. [0003] There are many brands of high-strength an...
Claims
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IPC IPC(8): C22C38/26
Inventor 张占普吴立志马党参刘建华陈再枝
Owner HEYE SPECIAL STEEL
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