【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，但愈合区与基体组织形态不一致的状况并未改善更多还原

【Abstract】 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.更多还原