In this paper, the failure of hot-work valve die is analysed with SEM, optical microscope and hardometer. The crack mechanism is explained and some methods are presented to prolong the die-durability.
本文运用电子扫描、金相分析、硬度测量等方法对气门阀热镦模的早裂进行了失效分析，探讨了模具的失效机理，提出了改善模具质量、提高模具使用寿命的途径。
The failure modes of the combination valve hot forging die in normal working condition are wear, collapse or cold hot fatigue crack.
气门锻模正常失效方式为磨损、压塌和冷热疲劳裂纹。
Abstract: Through hardness testing, metallographic microscope analysis, and other means, the origination of crack failure of the aluminum alloy die casting die was analyzed.
摘要：通过硬度测试、金相组织观察，研究分析了铝合金压铸模具发生早期龟裂失效的原因。
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