张银霞,王文广,郜伟,于鑫,杨鑫.研磨工艺对18CrNiMo7-6钢表面粗糙度和残余应力的影响[J].表面技术,2020,49(1):343-348.
ZHANG Yin-xia,WANG Wen-guang,GAO Wei,YU Xin,YANG Xin.Effect of Lapping Process on Surface Roughness and Residual Stress of 18CrNiMo7-6 Steel[J].Surface Technology,2020,49(1):343-348 |
| 研磨工艺对18CrNiMo7-6钢表面粗糙度和残余应力的影响 |
| Effect of Lapping Process on Surface Roughness and Residual Stress of 18CrNiMo7-6 Steel |
| 投稿时间：2019-04-18 修订日期：2020-01-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.01.041 |
| 中文关键词: 研磨 18CrNiMo7-6钢 渗碳 表面粗糙度 残余应力 |
| 英文关键词:lapping 18CrNiMo7-6 steel carburizing surface roughness residual stress |
| 基金项目:国家自然科学基金重点项目（U1804254）；国家留学基金委项目（201907045070）；中国博士后科学基金项目（2015M580635） |
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| Author | Institution |
| ZHANG Yin-xia | Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou 450001, China |
| WANG Wen-guang | Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou 450001, China |
| GAO Wei | Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou 450001, China |
| YU Xin | Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou 450001, China |
| YANG Xin | Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou 450001, China |
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| 中文摘要: |
| 目的 探究研磨工艺参数对18CrNiMo7-6钢渗碳前后工件表面粗糙度和残余应力的影响规律，从而为降低研磨加工工件表面粗糙度，提高表面质量提供依据。方法 分别采用三维表面轮廓仪和X射线残余应力分析仪对工件研磨前后的表面粗糙度和残余应力进行检测，通过单因素试验研究研磨垫粒度、研磨压力、研磨速度及研磨时间等研磨工艺参数对工件表面粗糙度和残余应力的影响规律。结果 随着研磨垫粒度从400#到3000#，渗碳前后工件表面粗糙度值均减小，Ra可达15~17 nm。渗碳前后工件表面残余应力值均增大，渗碳前表面表现为残余压应力，渗碳后表面可由较大的残余压应力升至残余拉应力。当研磨垫粒度为400#时，渗碳前后工件残余应力分别为–506.54 MPa和–587.29 MPa。研磨垫粒度为800#时，随着研磨压力、研磨速度及研磨时间的增大，渗碳前后工件表面粗糙度值均减小，且表面残余压应力值增大。结论 相同研磨条件下，渗碳后工件的表面粗糙度普遍小于基体件，而渗碳件的表面残余应力普遍大于基体件。18CrNiMo7-6钢渗碳后，硬度、耐磨性得到极大提高，其研磨过程中塑性变形程度减弱是导致上述现象的重要原因。 |
| 英文摘要: |
| The paper aims to explore the influences of lapping parameters on the surface roughness and residual stress of the workpiece before and after carburizing of 18CrNiMo7-6 steel to provide a basis for reducing the surface roughness of the workpiece and improve the surface quality. The surface roughness and residual stress of the workpiece before and after lapping were detected by three-dimensional surface profiler and X-ray residual stress analyzer. The influential rules of lapping parameters such as particle size, lapping pressure, lapping speed and lapping time on the surface roughness and residual stress of the workpiece were studied by single factor test. With the particle size of the lapping pad increasing from 400# to 3000#, the surface roughness value of the workpiece before and after carburizing decreased, reaching Ra 15~17 nm. The surface residual stress value of the workpiece increased before and after carburizing. The residual pressure stress rose to the residual tensile stress after carburizing. When the particle size of the lapping pad was 400#, the residual stress of the workpiece before and after carburizing was –506.54 MPa and –587.29 MPa respectively. When the particle size of the lapping pad was 800#, with the increase of lapping pressure, lapping speed and lapping time, the surface roughness value of the workpiece before and after carburizing was reduced, and the surface residual compressive stress value increased. Under the same lapping conditions, the surface roughness value of the workpiece after carburizing is generally smaller than that of the substrate, and the residual stress value of the carburized surface is generally larger than that of the substrate surface. The hardness and wear resistance of 18CrNiMo7-6 steel after carburizing are greatly improved, and the weakening of plastic deformation during lapping is an important cause of the above phenomenon. |
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