热塑性变形条件下钢内部裂纹愈合的实验研究  

EXPERIMENTAL STUDY ON INNER CRACK HEALING IN STEEL DURING HOT PLASTIC DEFORMING

作　　者：韦东滨[1] 韩静涛[1] 谢建新[1] 付晨光[1] 王连忠[1] 贺毓辛[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《金属学报》2000年第6期622-625,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金!59889101;国家自然科学基金!59771068

摘　　要：在HIGH－MULTI5000型热压机上对含有人工预置内部裂纹的20MnMo钢及20号钢试样进行了愈合实验，发现热塑性变形条件下，存在于预置内部裂纹区域的裂纹缝隙消失，裂纹完全愈合，愈合区内为铁素体，与无塑性变形、仅经过高温处理的试样内部裂纹形态进行对比，表明热塑性变形条件下愈合进程大大加快。The test that tries to heal inner crack in 20MnMo steel and 20 steel was carried out by using HIGH-MULTI 5000 hot-press equipment. Under the hot plastic deforming, the inner crack can be healed completely and ferrite has been discovered in the healing area. Contrasting to the results of high temperature healing treatment without plastic deforming, the healing process with hot plastic deforming is developed rapidly. Structural inhomogeneity between healing area and matrix can not be improved.

关 键 词：钢 内部裂纹 裂纹愈合 热塑性变形 

分 类 号：TG142.15[一般工业技术—材料科学与工程]