我厂生产M2～6的十字槽或一字槽螺钉。由于光冲模(图1)寿命低成了生产关键,我们先后采用60Si2、9SiCr、Cr12MoV、T10等材料来制造光冲模,寿命一般在几千到一万件左右,其损坏形式不是整体开裂就是打掉十字头。我们分析了模具的服役条件:我厂使用的是Z12-6型双击整模自动冷镦机,模具只承受小能量的多次冲击,因此只需要模具表面有较高的硬度和疲劳强度,而心部则只需要有一定的强度和良好的韧性、塑性。但上述材 I plant M2 ~ 6 cross slot or slotted screw. As the light die (Figure 1) has become the key to the low life expectancy, we have used 60Si2, 9SiCr, Cr12MoV, T10 and other materials to create light die, life expectancy is generally a few thousand to ten thousand or so, the damage is not the overall form of cracking is playing Cross the cross We analyzed the mold service conditions: Our factory is using Z12-6 double-click mold automatic cold heading machine, the mold withstands multiple shots of small energy, so only the mold surface has a higher hardness and fatigue strength, and The heart is only required to have a certain degree of strength and good toughness, plasticity. But the above material