船用柴油机连杆的喷丸强化工艺及性能研究

张雷雷, 马玉亮, 张晓云, 杨平, 唐豪, 焦凯

doi:10.16577/j.issn.1001-1560.2022.0288

材料保护 >

2022 , Vol. 55 >Issue 10: 135 - 138

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0288

工艺探讨

船用柴油机连杆的喷丸强化工艺及性能研究

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(陕西柴油机重工有限公司，陕西兴平 713100)

张雷雷(1995-)，助理工程师，硕士，主要研究方向为金属热处理与表面处理，电话：18894007059，E-mail：1601931671@qq.com

收稿日期: 2022-04-20

修回日期: 2022-05-18

录用日期: 2022-06-13

网络出版日期: 2023-12-23

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Study on Shot Peening Technology and Performance of Connecting Rod for Marine Diesel Engine

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(Shaanxi Diesel Engine Heavy Industry Co.,Ltd.,Xingping 713100,China)

Received date: 2022-04-20

Revised date: 2022-05-18

Accepted date: 2022-06-13

Online published: 2023-12-23

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摘要

为通过优化喷丸工艺来提高连杆的生产效率，测试不同工艺下Almen试片的弧高值，绘制出了喷丸过程的饱和曲线，根据Almen10%理论确定了喷丸过程的最佳工艺；在最佳喷丸工艺下，测试了试样喷丸后的显微硬度、表面粗糙度和残余压应力。结果表明：喷丸后试样的硬度由原来的334 HV提高到408 HV，表面粗糙度由0.26 μm升高到2.68 μm，残余压应力从表面至心部逐渐减小，表面最高残余压应力为-554 MPa。在最佳工艺下，对连杆进行了喷丸处理，结果满足技术要求。

关键词： 喷丸; 饱和曲线; 应力; 连杆

本文引用格式

张雷雷, 马玉亮, 张晓云, 杨平, 唐豪, 焦凯 . 船用柴油机连杆的喷丸强化工艺及性能研究[J]. 材料保护, 2022 , 55(10) : 135 -138 . DOI: 10.16577/j.issn.1001-1560.2022.0288

Abstract

For improving the production efficiency of connecting rods by optimizing the shot peening process,the arc height values of Almen test pieces under different processes were tested,the saturation curves of the shot peening processes were drawn,and finally,the optimum shot peening process was determined according to the Almen 10% theory.The microhardness,surface roughness and residual compressive stress of the sample under the optimal peening process were investigated.Results showed that after shot peening,the hardness of the sample was improved from the original 334 HV to 408 HV,the surface roughness increased from 0.26 μm to 2.68 μm,the residual compressive stress gradually decreased from the surface to the core,and the highest residual compressive stress on the surface was-554 MPa.When shot peened under the optimal process conditions,the connecting rod could meet the technical requirements.

Key words： shot peening; saturation curve; stress; connecting rod

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