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根据高强度钢弹体热成形模具的服役条件和高温合金的设计原则,设计了以中碳、低Cr、Ni、高W、Mo和多元强化为合金化方向的铁基高温堆焊合金模具材料。运用X-射线衍射分析、金相组织观察和性能测试等手段,探讨了合金成分和热处理工艺对该合金组织及性能的影响。结果表明:该合金经固溶-时效处理获得以奥氏体为基体以及弥散分布的合金碳化物M6C和金属间化合物Laves相等强化相,具有良好的高温力学性能和抗氧化性能,工作温度达700～850℃。
According to the service conditions of high-strength steel projectile thermoforming mold and the design principle of high-temperature alloy, the iron-based high-temperature surfacing alloy mold material with medium carbon, low Cr, Ni, high W, Mo and multiple strengthening is designed . The effects of alloy composition and heat treatment process on microstructure and properties of the alloy were investigated by means of X-ray diffraction analysis, microstructure observation and property test. The results show that the alloy has the austenite matrix and the Laves equal strengthening phase of the intermetallic compound, which has austenite matrix and dispersed distribution. The alloy has good high temperature mechanical properties and oxidation resistance. The working temperature reaches 700 ~ 850 ℃.