论文部分内容阅读
目前,我国使用最广泛的高速钢是钨系W18Cr4V(以下简称18-4-1)钢和钨钼系W6Mo5Cr4V2(以下简称6-5-5-2)钢。这两种钢的传统淬火回火工艺的特点是,高温淬火后在二次硬化温度范围回火三次,以获得高硬度和热硬性,其工艺规范如表1所示。这种处理的主要缺点是,在某些场合韧性不足。为了改善刃具特别是冷作模具的强韧性,近
At present, China’s most widely used high-speed steel is tungsten W18Cr4V (hereinafter referred to as 18-4-1) steel and tungsten and molybdenum W6Mo5Cr4V2 (hereinafter referred to as 6-5-5-2) steel. Conventional quenching and tempering processes for both steels are characterized by tempering three times in the secondary hardening temperature range after high temperature quenching to obtain high hardness and thermosetting properties as shown in Table 1 below. The main disadvantage of this treatment is that in some cases the lack of toughness. In order to improve the toughness of cutting tools, especially cold-working tools,