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Cr12MoV 是最常用的冷作模具钢,但如采用直接加热到淬火温度,然后直接油淬的工艺,易使工件变形超差,或者早期失效。为避免以上缺点,可以采取分段加热和分级淬火的工艺,但这需要较完备的热处理设施,对于许多条件不具备、缺乏盐浴炉的小厂和车间是很困难的。我厂采用的简易分级淬火工艺,设备要求低,效果也较好,现介绍于下,以供热处理条件不齐备的工厂,尤其是乡镇企业参考应用。具体工艺步骤如下:(1)750～800℃预热:将工件用木炭
Cr12MoV is the most commonly used cold die steel, but if directly heated to quenching temperature, and then direct oil quenching process, easy to make the workpiece deformation tolerance, or early failure. To avoid these shortcomings, sub-heating and fractional quenching can be used. However, this requires a more complete heat treatment facility. For many conditions, small plants and workshops lacking salt bath furnaces are very difficult. I plant a simple classification of quenching process, equipment requirements are low, the effect is better, are introduced in the next, to heat treatment conditions are not fully equipped factories, especially for township enterprises reference applications. Specific process steps are as follows: (1) 750 ~ 800 ℃ Preheating: the workpiece with charcoal