Microstructure Evolution of CLAM/15 15Ti Dissimilar Steels TIG Welded Joint before and after Heat Treatment
In order to research the microstructural evolution and hardness characteristics of martensitic steel and stainless steel welded joints, CLAM/ 1515Ti dissimilar metal joints were welded by TIG welding. When we compared microstructure and hardness of the joint before and after heat treatment, the resu...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Harbin University of Science and Technology Publications
2019-12-01
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| Series: | Journal of Harbin University of Science and Technology |
| Subjects: | |
| Online Access: | https://hlgxb.hrbust.edu.cn/#/digest?ArticleID=1796 |
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| Summary: | In order to research the microstructural evolution and hardness characteristics of martensitic steel and stainless steel welded joints, CLAM/ 1515Ti dissimilar metal joints were welded by TIG welding. When we compared microstructure and hardness of the joint before and after heat treatment, the results showed that Welding metal is composed of lath martensite and a small amount ferrite, and the hardness distribution ranges from 407HV to 463HV. The heat affected zone of CLAM steel is composed of complete and incomplete quenching zone. The incompletely quenching zone is obviously soft compared to other zones. The heataffected zone of 1515Ti has the lowest hardness of the whole joint. After heat treatment, the high hardness area of joint decreased and the welding metal transformed into the tempered martensite while the precipitates increased and the hardness decreased by 20% |
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| ISSN: | 1007-2683 |