CAJ | 학술논문

介绍了锻造裂纹的主要试验研究方法:高温拉伸、热镦粗、热扭转、热弯曲和应变诱导裂纹,并结合裂纹附近微观组织和热力学理论探讨了多种材料锻件裂纹形成的原因.得出锻件裂纹不仅取决于材料本身的内因,而且与力学性能、组织结构、制件尺寸等因素有关.阐述了目前锻造裂纹的预防原则、内裂修复原理以及应用情况.
개소료단조렬문적주요시험연구방법:고온랍신、열대조、열뉴전、열만곡화응변유도렬문,병결합렬문부근미관조직화열역학이론탐토료다충재료단건렬문형성적원인.득출단건렬문불부취결우재료본신적내인,이차여역학성능、조직결구、제건척촌등인소유관.천술료목전단조렬문적예방원칙、내렬수복원리이급응용정황.
The main experimental research methods of forging cracks, such as hot-tension test, hot-compression test, hot twisting, bending and strain induced crack opening test were presented. The causes of crack generation for differ-ent materials were discussed on the basis of microstructure near crack and thermodynamics theory. The results show that forging cracks are not only decided by inner reason of material but also related to mechanical property, microstruc-ture and product size. The preventive principle of forging cracks, internal cracks healing mechanism and usage situa-tion were clarified.