| 蒋烨倩,唐羽,强柯佳,沈阳,张柯.焊接功率对双相1500钢焊接接头组织和性能影响研究[J].有色金属材料与工程,2026,47(1):27-35. |
| 焊接功率对双相1500钢焊接接头组织和性能影响研究 |
| Study on the influence of welding power on microstructure and properties of dual-phase 1500 steel welded joints |
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| DOI：10.13258/j.cnki.nmme.20250417001 |
| 中文关键词: DP1500钢 激光焊接 微观组织 力学性能 |
| 英文关键词:DP1500 steel laser welding microstructure mechanical properties |
| 基金项目:国家自然科学基金资助项目（51971148） |
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| 摘要点击次数: 527 |
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| 中文摘要: |
| 使用 Nd∶YAG激光器对双相（ dual-phase, DP）1500钢进行激光焊接。利用金相显微镜（ optical microscope, OM）、扫描电子显微镜（ scanning electron microscope, SEM）、透射电子显微镜（ transmission electron microscope, TEM）、 洛氏硬度试验机、万能拉伸试验机，研究了不同焊接功率对 DP1500钢焊接接头微观组织及力学性能的影响。宏、微观组织表征结果表明，随着焊接功率的增加，熔宽从 1.39 mm增加到 2.39 mm，焊缝区粗大板条马氏体组织逐渐细化且取向趋于一致， 而热影响区出现晶粒粗化现象。力学性能测试结果显示，焊接接头的屈服强度和抗拉强度均随焊接功率增加呈先增加后降低的趋势。在 1.5～3.5 kW焊接功率范围内，当焊接功率为 2.0 kW时，焊接接头的抗拉强度和断裂伸长率达到最佳，分别为 1 310 MPa和 4.29%。 |
| 英文摘要: |
| A Nd∶YAG laser was used to laser weld dual-phase (DP) 1500 steel. The effects of different welding power on the microstructure and mechanical properties of DP1500 steel welded joints were investigated using an optical microscope (OM), a scanning electron microscope (SEM), a transmission electron microscope (TEM), a Rockwell hardness tester, and a universal tensile tester. The effects of different welding powers on the microstructure and mechanical properties of DP1500 steel welded joints were investigated. Through the macro-microstructure characterization, it was found that with the increase of welding power, the melt width increased from 1.39 mm to 2.39 mm, the martensite organization of the thick slats in the weld zone was gradually refined and the orientation distribution was more consistent, and the grain coarsening phenomenon appeared in the heat-affected zone. From the mechanical properties, with the increase of welding power, the yield strength and tensile strength of welded joints are increased and then decreased. In the welding power range of 1.5~3.5 kW, the tensile strength and elongation at break of the welded joints were the best when the welding power was 2 kW, which were 1 310 MPa and 4.29%, respectively. |
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