锻压技术

等温锻用模具材料ZGM2合金的组织性能研究

英文标题：Mechanical property and microscopic structure research on die material ZGM2 alloy for isothermal forging

作者：张会张昌明姚泽坤冯小明郭从盛

单位：陕西理工学院材料学院陕西理工学院机械工程学院西北工业大学材料学院陕西理工学院材料学院陕西理工学院材料学院陕西汉中723003 陕西汉中723003 陕西西安710073 陕西汉中723003 陕西汉中723003

分类号：TG136.1

出版年,卷(期):页码：2008,33(1):103-106

摘要：

对ZGM2铸造高温合金热处理前后的室温与高温拉伸性能、以及持久性能进行了实验研究,对金相组织进行了观察分析。结果表明,未经热处理的ZGM2合金,在室温~700℃瞬时拉伸强度变化不大;超过700℃后,强度随着温度提高而逐渐下降,塑性则随着温度的升高而下降,这与树枝晶组织结构中存在较多疏松导致高温塑性下降有关。在750℃、295 MPa应力下,持久寿命长达680 h;在800℃、245 MPa应力下,铸态ZGM2合金有较长的持久寿命。随着变形温度的提高,合金的枝晶有球化及枝干断开趋势,但高温性能,特别是塑性有所下降。所以,铸态ZGM2合金可作为800℃以下等温锻模具材料。

The room temperature and high temperature drawing performance of ZGM2 superalloys before and after heat treatment and the endurance were studied.The metallographic was analyzed.The research indicates that ZGM2 alloy before heat treatment has no big change for instantaneous tensile strength from the room temperature to 700℃,but when it is above 700℃, the strength falls down gradually with temperature increasing and its plasticity decreases straightly as the temperature increases because there is more rarefaction in fir-tree crystal.It has a long life up to 680h at 750℃/295MPa and its cast phase has a better creep rupture life at 800℃/245MPa.Fir-tree crystal has a tendency of spheroidization and the branch will be interrupted as the temperature increases.But its high temperature behavior,especially plasticity will fall.So ZGM2 alloy can be used for die material of isothermal forging below 800℃.

基金项目：

陕西理工学院科研计划基金资助项目(SLG0602)

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