热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2010年
4期
162-163,166
,共3页
搬手头%淬火裂纹%弧形裂纹%尖角效应%应力集中
搬手頭%淬火裂紋%弧形裂紋%尖角效應%應力集中
반수두%쉬화렬문%호형렬문%첨각효응%응력집중
move-on-hand%hardening crack%arc-shaped crack%acute angle effect%stress concentration
通过宏观检验、微观检验、显微硬度测定及化学成分分析等方法,对45钢搬手头产生裂纹的原因进行分析.结果表明,搬手头内六方处的裂纹,是尖角效应引起应力集中而产生的应力集中裂纹;垂直于轴线的裂纹是因为淬火快速冷却时.厚壁处未淬透以及截面尺寸突变产生的弧形裂纹.
通過宏觀檢驗、微觀檢驗、顯微硬度測定及化學成分分析等方法,對45鋼搬手頭產生裂紋的原因進行分析.結果錶明,搬手頭內六方處的裂紋,是尖角效應引起應力集中而產生的應力集中裂紋;垂直于軸線的裂紋是因為淬火快速冷卻時.厚壁處未淬透以及截麵呎吋突變產生的弧形裂紋.
통과굉관검험、미관검험、현미경도측정급화학성분분석등방법,대45강반수두산생렬문적원인진행분석.결과표명,반수두내륙방처적렬문,시첨각효응인기응력집중이산생적응력집중렬문;수직우축선적렬문시인위쉬화쾌속냉각시.후벽처미쉬투이급절면척촌돌변산생적호형렬문.
Through macroscopic methods, microscopic examination, micro hardness measurement and chemical composition analysis, the reason of quenched crack of 45 steel move-on-hand was analyzed. The results show that the crack of the department within the six-party of the move-on-hand is caused by stress concentration on the acute angle effect. Crack perpendicular to the axis is caused on too rapid quench cooling, non-hardenability of the thick-walled department, as well as mutation of cross-section size. This is a typical arc-shaped crack.
