金属学报  1996, Vol. 32 Issue (7): 723-729

论文 本期目录 | 过刊浏览 |

20MnMo钢内裂纹修复现象的发现及其金属组织的变化

韩静涛;赵钢;曹起骧

北京科技大学;中国人民解放军1202工厂;清华大学

DISCOVERY OF INNER CRACK RECOVERY AND ITS STRUCTURE CHANGE IN 20MnMo STEEL

HAN Jingtao (University of Science and Technology Beijing; Beijing 100083);ZHAO Gang (The 1202 Factory of PLA; Beijing 100036); CAO Qixiang(Tsinghua University; Beijing 100084) (Manuscript received 1995-11-10; in revised form 1996-02-14)

韩静涛;赵钢;曹起骧. 20MnMo钢内裂纹修复现象的发现及其金属组织的变化[J]. 金属学报, 1996, 32(7): 723-729.
, , . DISCOVERY OF INNER CRACK RECOVERY AND ITS STRUCTURE CHANGE IN 20MnMo STEEL[J]. Acta Metall Sin, 1996, 32(7): 723-729.

摘要 参考文献 相关文章 Metrics 全文: PDF(638 KB)   摘要: 通过物理模拟研究，发现了２０ＭｎＭｏ钢内裂纹在高温下可修复的现象，并总结了其初步规律，认为这种修复过程主要是由原子的扩散迁移所造成．内裂纹的修复可分为空洞填充和晶粒长大两个阶段。填充物初期由细小晶粒所组成，存在Ｆｅ的成分偏析，与基体的分界面清晰．随后的晶粒长大与成分均匀化同时进行．一定的塑性变形，可使内裂纹及空洞等被很好的填充和压合．为保证内裂纹的完全修复，需一定的保温时间，使晶粒充分长大． 关键词 ： 内裂纹,  高温损伤,  裂纹修复,  塑性加工     Abstract：By physical modelling, the recovery phenomenon of inner crack in 20MnMo steel at high temperature was discovered, and its regular pattern was concluded.It was believed that the recovery process was mainly controlled by the diffusion and migration of metal atoms. The recovery process can be divided into two steps, void filling and grain growing. The filling materials consisted of many very fine grains with segregation of iron. There was a very clear boundary between the filling materials and matrix. The grain growing and composition homogenzing occurred simultaneously. Inner cracks and voids can be filled and taken away in a certain deformation. A certain holding time was necessary for grain growing and inner crack recovery entirely.Correspondent: HAN Jingtao, associate professor, Department of Metalworking, University of Scicnce and Technology Beijing, Beijing 100083 Key words： inner crack    damage at high temperature    crack recovery    metal forming 收稿日期: 1996-07-18      基金资助:国家自然科学基金 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 韩静涛 赵钢 曹起骧 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1996/V32/I7/723 1曹起骧,韩静涛,马庆贤,郑 涛,谢云灿,李福利．塑性工程学报,1994,1(1):142 ShapiroE,DieterGE．MetallTrans,1970,1:17113金宁．清华大学博士学位论文,1990 [1] 潘复生, 蒋斌. 镁合金塑性加工技术发展及应用[J]. 金属学报, 2021, 57(11): 1362-1379. [2] 窦坤, 卿家胜, 王雷, 张晓峰, 王宝, 刘青, 董洪标. 基于微观偏析模型的连铸方坯内裂纹敏感性研究[J]. 金属学报, 2014, 50(12): 1505-1512. [3] 韩志强; 蔡开科 . 连铸坯中微观偏析的模型研究[J]. 金属学报, 2000, 36(8): 869-873 . Viewed Full text Abstract Cited   Shared      Discussed