CAJ | 학술논문

通过对失效的H13钢穿心杆进行化学成分、宏观形貌和显微组织检测，分析其发生变形和颈缩的原因。结果表明，穿心杆失效并不是真空淬火、氮-碳共渗等热处理工艺控制不当，直接原因是非金属硫化物夹杂超标，带状偏析严重及在偏析带内存在较多的链状分布碳化物液析引起的。
통과대실효적H13강천심간진행화학성분、굉관형모화현미조직검측，분석기발생변형화경축적원인。결과표명，천심간실효병불시진공쉬화、담-탄공삼등열처리공예공제불당，직접원인시비금속류화물협잡초표，대상편석엄중급재편석대내존재교다적련상분포탄화물액석인기적。
The causes of deformation and necking of invalid H13 hollow rod were analyzed by testing the chemical composition, macro morphology and microscopic structure. The re-sult shows that the invalidation of the rod is not because of the improper control of heat treatment process such as vacuum hardening and nitrocarburizing; the direct cause is the excess of non-metal sulphide inclusion, serious banded segregation and more chain distribu-tion of carbide liquation existing in the segregation band.