Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint
The surface of 1Cr5Mo heat-resistant steel welded joint was treated with CO<sub>2</sub> laser,the microstructure and grain size grades of welded joints before and after laser heat treatment (LHT) were analyzed with 4XC type optical microscope (OM),and the distribution of residual stress...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2017-01-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2017/V45/I1/65 |
| _version_ | 1797967080514912256 |
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| author | GUO Wei KONG De-jun WANG Wen-chang |
| author_facet | GUO Wei KONG De-jun WANG Wen-chang |
| author_sort | GUO Wei |
| collection | DOAJ |
| description | The surface of 1Cr5Mo heat-resistant steel welded joint was treated with CO<sub>2</sub> laser,the microstructure and grain size grades of welded joints before and after laser heat treatment (LHT) were analyzed with 4XC type optical microscope (OM),and the distribution of residual stress and retained austenite content in the surface of the welded joints were measured with X-ray diffraction (XRD) stress tester.The results show that the grains of 1Cr5Mo steel welded joints are refined by LHT,and the microstructure uniformity improves significantly,the grain levels of welded zone,fusion zone,overheated zone and normalized zone increase from level 9,level 9.8,level 8 and level 10.7 to level 10,level 10.2,level 8.5 and level 11 respectively,the mechanical weak areas reduce from overheated zone,welded zone and fusion zone to the overheated zone.The tensile residual stress in the welded joint surface is eliminated by LHT and a layer of compressive residual stress with thickness of about 0.28mm is formed.The residual austenite content in the welded joint surface increases after LHT,of which the distribution is more uniform and conducive to the improvement of mechanical properties. |
| first_indexed | 2024-04-11T02:25:31Z |
| format | Article |
| id | doaj.art-1c4bb065e7f6497ba9bee6cf039e1d13 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:25:31Z |
| publishDate | 2017-01-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-1c4bb065e7f6497ba9bee6cf039e1d132023-01-02T22:50:01ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812017-01-01451657110.11868/j.issn.1001-4381.2015.00023720170111Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded JointGUO Wei0KONG De-jun1WANG Wen-chang2School of Mechanical Engineering, Changzhou University, Changzhou 213164, Jiangsu, ChinaSchool of Mechanical Engineering, Changzhou University, Changzhou 213164, Jiangsu, ChinaSchool of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, ChinaThe surface of 1Cr5Mo heat-resistant steel welded joint was treated with CO<sub>2</sub> laser,the microstructure and grain size grades of welded joints before and after laser heat treatment (LHT) were analyzed with 4XC type optical microscope (OM),and the distribution of residual stress and retained austenite content in the surface of the welded joints were measured with X-ray diffraction (XRD) stress tester.The results show that the grains of 1Cr5Mo steel welded joints are refined by LHT,and the microstructure uniformity improves significantly,the grain levels of welded zone,fusion zone,overheated zone and normalized zone increase from level 9,level 9.8,level 8 and level 10.7 to level 10,level 10.2,level 8.5 and level 11 respectively,the mechanical weak areas reduce from overheated zone,welded zone and fusion zone to the overheated zone.The tensile residual stress in the welded joint surface is eliminated by LHT and a layer of compressive residual stress with thickness of about 0.28mm is formed.The residual austenite content in the welded joint surface increases after LHT,of which the distribution is more uniform and conducive to the improvement of mechanical properties.http://jme.biam.ac.cn/CN/Y2017/V45/I1/65laser heat treatment1Cr5Mo heat-resistant steelwelded jointmicrostructureresidual stress |
| spellingShingle | GUO Wei KONG De-jun WANG Wen-chang Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint Cailiao gongcheng laser heat treatment 1Cr5Mo heat-resistant steel welded joint microstructure residual stress |
| title | Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint |
| title_full | Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint |
| title_fullStr | Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint |
| title_full_unstemmed | Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint |
| title_short | Effect of Laser Heat Treatment on Microstructures of 1Cr5Mo Steel Welded Joint |
| title_sort | effect of laser heat treatment on microstructures of 1cr5mo steel welded joint |
| topic | laser heat treatment 1Cr5Mo heat-resistant steel welded joint microstructure residual stress |
| url | http://jme.biam.ac.cn/CN/Y2017/V45/I1/65 |
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