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7CrSiMnMoV钢是84年由首钢与第二汽车厂共同研制成功的新型冷作模具钢。该钢淬透性好,热处理变形小,在硬度相同的条件下抗弯、抗压及冲击韧性高于CrWMn及Cr12MoV钢,但耐磨性较后者低。大量研究工作表明,钢的强韧性和耐磨性与钢中碳化物的形态、大小、分布以及钢中奥氏体晶粒度和马氏体的形态密切相关。本试验研究了予先热处
7CrSiMnMoV steel is 84 years by Shougang and the second automobile plant jointly developed a new type of cold work die steel. The hardenability of the steel, heat treatment deformation is small, the same hardness under the conditions of bending, compression and impact toughness higher than the CrWMn and Cr12MoV steel, but the lower wear resistance. A large number of studies have shown that the toughness and wear resistance of steel is closely related to the shape, size and distribution of carbides in steel and the grain size of austenite and the morphology of martensite in steel. This experiment studied the pre-heat place