论文部分内容阅读
采用各种显微组织分析手段,对3Cr2W8V钢制的热成形冲头进行了失效分析。由于热冲头的工作频率高和温升高,使模具损坏严重。按损坏形式不同,可将失效冲头的工作部位分成三个区域:1区,以高温回火软化为主;2区,以热疲劳开裂为主;3区,以高温氧化为主。研究中还发现,在冲头工作部位的表面都出现一个3～4mm的软化层,其硬度为200～400HV。对此,从显微组织的角度予以分析研究。关于为何3Cr2W8V钢容易发生上述种类的失效损坏,以及对于各种失效因素可采用的对策,本文亦进行了分析、讨论。
A variety of microstructure analysis methods, the 3Cr2W8V steel hot forming punch failed analysis. Due to the hot punch high frequency and high temperature, the mold damage serious. According to different forms of damage, the working area of the failure punch can be divided into three areas: Zone 1, which is mainly tempered at high temperature; zone 2 is mainly thermal fatigue cracking; Zone 3 is dominated by high temperature oxidation. The study also found that in the punch work surface appears a 3 ~ 4mm softening layer, the hardness of 200 ~ 400HV. In this regard, from the perspective of microstructure analysis and research. As for why 3Cr2W8V steel prone to failure of the above types of failure, as well as a variety of failure factors can be adopted countermeasures, this article also analyzed and discussed.