何鹏,谢鑫成,陈嘉懿,张宇鹏,邹涛,萧金瑞,梁忠伟.强化改性研磨时间对12Cr17Mn6Ni5N钢表层特性及拉伸性能的影响[J].表面技术,2024,53(15):173-183, 233.
HE Peng,XIE Xincheng,CHEN Jiayi,ZHANG Yupeng,ZOU Tao,XIAO Jinrui,LIANG Zhongwei.#$NPEffect of Strengthening Grinding Time on Surface Layer Properties and Tensile Properties of 12Cr17Mn6Ni5N Steel[J].Surface Technology,2024,53(15):173-183, 233 |
| 强化改性研磨时间对12Cr17Mn6Ni5N钢表层特性及拉伸性能的影响 |
| #$NPEffect of Strengthening Grinding Time on Surface Layer Properties and Tensile Properties of 12Cr17Mn6Ni5N Steel |
| 投稿时间：2023-07-04 修订日期：2023-11-30 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.15.016 |
| 中文关键词: 强化改性研磨 12Cr17Mn6Ni5N 表层特性 拉伸性能 |
| 英文关键词:strengthening grinding 12Cr17Mn6Ni5N surface layer properties tensile properties |
| 基金项目:国家重点研发计划项目(2023YFB100140);国家自然科学基金(51975136);广东省自然科学基金(2023A1515011723);教育部产学研协同育人项目(230703950183536，220903950010408);广东省高校重点领域专项(2023ZDZX3016，2019KZDZX1009);广州高校产学研重点项目(202235139);广州大学校内科研项目(YJ2023034，YJ2021002) |
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| Author | Institution |
| HE Peng | School of Mechanical and Electrical Engineering,Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material, c.Guangdong Engineering Research Centre for Strengthen Grinding and Micro/Nano High-performance Machining, Guangzhou University, Guangzhou 510006, China |
| XIE Xincheng | School of Mechanical and Electrical Engineering,Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material, c.Guangdong Engineering Research Centre for Strengthen Grinding and Micro/Nano High-performance Machining, Guangzhou University, Guangzhou 510006, China |
| CHEN Jiayi | School of Mechanical and Electrical Engineering,Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material, c.Guangdong Engineering Research Centre for Strengthen Grinding and Micro/Nano High-performance Machining, Guangzhou University, Guangzhou 510006, China |
| ZHANG Yupeng | China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangzhou 510651, China |
| ZOU Tao | School of Mechanical and Electrical Engineering,Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material, c.Guangdong Engineering Research Centre for Strengthen Grinding and Micro/Nano High-performance Machining, Guangzhou University, Guangzhou 510006, China |
| XIAO Jinrui | School of Mechanical and Electrical Engineering,Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material, c.Guangdong Engineering Research Centre for Strengthen Grinding and Micro/Nano High-performance Machining, Guangzhou University, Guangzhou 510006, China |
| LIANG Zhongwei | School of Mechanical and Electrical Engineering,Guangzhou Key Laboratory for Strengthened Grinding and High Performance Machining of Metal Material, c.Guangdong Engineering Research Centre for Strengthen Grinding and Micro/Nano High-performance Machining, Guangzhou University, Guangzhou 510006, China |
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| 中文摘要: |
| 目的 提高12Cr17Mn6Ni5N钢焊缝的表层特性及拉伸性能。方法 采用单一变量法控制强化改性研磨加工时间，在12Cr17Mn6Ni5N钢表面进行强化改性研磨处理。进行了室温拉伸试验，绘制各样品的应力-应变曲线图，并通过扫描电镜拍摄距离表面30、100、170 μm深度附近的断口形貌，分析表层的断裂机理。进一步分析各样品的表面线粗糙度、表层三维形貌、表面微观形貌、强化层厚度、截面显微硬度和表面残余应力。结果 与母材相比加工时间从1 min增加至3 min，12Cr17Mn6Ni5N钢表面微观织构越多，拉伸方向和沿焊缝方向的表面粗糙度分别提高到Ra=1.81 μm、Ra=1.46 μm，三维形貌高度差先增加到34.82 μm后减少为31.75 μm，表层显微硬度最多提高了104.60%，残余应力提高到–1 221.3 MPa，强化层最厚为160 μm。在相同的载荷条件下，加工时间为3 min的样品的屈服强度和抗拉强度分别提高了15.89%和10.17%。在深度30 μm附近，加工时间为3 min的样品的断口形貌出现少量韧窝，其他样品都为脆性断裂，其中母材样品为全解离脆性断裂;深度100 μm附近，母材样品仍为脆性断裂，加工时间为1 min和2 min的样品都为混合断裂，加工时间为3 min的样品为韧性断裂且出现较深的大韧窝和深韧窝。结论 强化改性研磨可以有效改善12Cr17Mn6Ni5N钢焊缝的表层特性，获得高硬度、高残余应力和组织致密的厚强化层，进而提高屈服强度和抗拉强度。 |
| 英文摘要: |
| To improve the surface properties and tensile properties of 12Cr17Mn6Ni5N steel welds, the single variable method was used to control the processing time of strengthening grinding, and the surface of 12Cr17Mn6Ni5N steel was subject to strengthening grinding at processing times of 1 min, 2 min, and 3 min, respectively. Under the same loading conditions, tensile experiments were carried out on an electronic universal mechanical testing machine at a room temperature of 24-26 ℃. The stress-strain curves of each sample were plotted, and the fracture morphology near the depths of 30 μm, 100 μm, and 170 μm from the surface was photographed by scanning electron microscopy. In the first step, the roughness of each sample was measured in the tensile direction and along the weld seam direction with a roughness profiler, followed by the micro- morphology of the surface with a scanning electron microscope and the 3D morphology of the surface with a three-dimensional measurement microscope. The micro-hardness of each sample was measured with a micro-hardness tester for the micro-micro- hardness of each sample in different depths and the residual stress was measured with a residual stress tester. Secondly, the hardness of each sample was measured with a microhardness tester, the residual stress on the surface was measured with a residual stress tester, and then the surface organization of each sample was measured with an optical metallographic microscope. After the room temperature tensile test, the fracture morphology of the tensile samples was photographed with a scanning electron microscope. Compared with the base material, when the processing time increased from 1 min to 3 min, the more the surface microstructure of 12Cr17Mn6Ni5N steel, the surface roughness in the direction of tensile and along the weld increased to Ra=1.81 μm, Ra=1.46 μm. The height difference of the three-dimensional morphology increased to 34.82 μm and then decreased to 31.75 μm, and the microhardness of the surface layer was increased by up to 104.60 percent. The residual stress was increased to −1 221.3 MPa, and the maximum thickness of the reinforced layer was 160 μm. Under the same loading conditions, the yield strength and tensile strength of the samples with a processing time of 3 min were increased by 15.89% and 10.17%, respectively. Near the depth of 30 μm, the fracture morphology of the sample with a processing time of 3 min showed a small number of tough nests. The other samples were brittle fractures, in which the parent sample was fully dissociated brittle fracture; Near the depth of 100 μm, the parent sample was still brittle fracture. The samples with processing time of 1 min and 2 min were mixed fracture. And the sample with processing time of 3 min was ductile fracture and showed deeper large tough nests and deep tough nests. In conclusion, strengthening grinding process can effectively improve the laser welded 12Cr17Mn6Ni5N steel surface characteristics. With the increase of processing time, the more the laser welded 12Cr17Mn6Ni5N surface microstructure, the higher the surface roughness. The three-dimensional morphology height difference first increased and then decreased. The higher the hardness and residual stress, the thicker the organization of the dense reinforced layer. Strengthening grinding method effectively improves the tensile strength and yield strength of the laser welded 12Cr17Mn6Ni5N steel. And the longer the processing time within a certain range, the more obvious the enhancement effect, but the elongation decreased. |
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