| 三大常用热作模具用钢及处理工艺 |
| 添加时间：2017/5/5 16:33:03 浏览次数： |
（1）锤锻模用钢 (1) steel for forging die 一般说来，锤锻模用钢有两个问题比较突出：一是工作时受冲击负荷作用，故对钢的力学性能要求较高，特别是对塑变抗力及韧性要求较高；二是锤锻模的截面尺寸较大（＜400mm），故对钢的淬透性要求较高，以保证整个模具组织和性能均匀。 Generally speaking, there are two problems of hammer forging die steel stand out: one is subjected to impact load at work, therefore, the mechanical properties of the steel demand is higher, especially for plastic deformation resistance and high toughness requirements; It is a large section size (< 400mm), so it is required to harden the steel, so as to ensure that the whole die structure and performance are even. 常用锤锻模用钢有5CrNiMo、5CrMnMo、5CrNiW、5CrNiTi及5CrMnMoSiV等，不同类型的锤锻模应选用不同的材料。对特大型或大型的锤锻模以5CrNiMo为好，也可采用5CrNiTi、5CrNiW或5CrMnMoSi等；对中小型的锤锻模通常选用5CrMnMo钢。 The hammer die is made of 5CrNiMo, 5CrMnMo, 5CrNiW, 5CrNiTi and 5CrMnMoSiV, etc. Different types of hammer should be used in different materials. Large and large hammer-forging models are good for 5CrNiMo, and can be used for 5CrNiTi, 5CrNiW, or 5CrMnMoSi. 5CrMnMo steel is usually used for hammer forging of small and medium size. （2）热挤压模用钢 (2) hot extrusion die steel 热挤压模的工作特点是加载速度较慢，因此，模腔受热温度较高，通常可达500-800℃。对这类钢的使用性能要求应以高的高温强度（即高的回火稳定性）和高的耐热疲劳性能为主，对淬透性的要求可适当放低。一般的热挤压模尺寸较小，常小于70-90mm，其中4CrW2Si既可做冷作模具钢，又可做热作模具钢。由于用途不同，可采用不同的热处理方法。作冷模时，采用较低的淬火温度（870-900℃）及低温或中温回火处理；作热模时，则采用较高的淬火温度（一般为950-1000℃）及高温回火处理。 The working characteristics of hot extrusion die is loading speed is slow, therefore, cavity heated temperature is higher, often up to 500-800 ℃. The use of this kind of steel high temperature strength of high performance requirements should be (i.e. high tempering stability) and high heat fatigue performance is given priority to, lower demand for hardenability can be appropriately. The general hot extrusion die is smaller, often less than 70-90mm, including 4CrW2Si, which can be used for cold making mold steel, but also can be made by hot metal. Different heat treatment methods can be used for different purposes. Make LengMo, adopting low quenching temperature (870-900 ℃) and low or medium temperature tempering treatment; Make hot die,, the use of the high quenching temperature (generally 950-1000 ℃) and high temperature tempering treatment. |
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