镀锌钢压印接头热处理后拉剪强度及组织形态
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昆明理工大学机电学院

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TG162. 8

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Tensile鄄Shear Strength and Microstructure After Galvanize SteelClinched Joints Heat Treatment
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    摘要:

    通过搭建局部热处理试验装置,对镀锌钢压印接头部位进行火焰淬火处理。然后对试件进行力
    学性能测试,制备金相试样观察分析经过局部热处理后接头显微组织,并对比热处理前后组织的显微硬度。结
    果表明:火焰淬火使接头失效时颈部撕裂程度变大;拉剪强度提高16. 7%;经过火焰淬火处理接头部位材料组
    织呈现为板条状马氏体,该组织较未经过热处理的组织显微硬度提升了12. 1%。

    Abstract:

    In this paper, a thermal treatment apparatus was established to take local heat treatment on zinc鄄coa鄄
    ted clinched joints. Then mechanical test was conducted on the specimens under tensile鄄shear condition, and the met鄄
    allographic specimens were prepared to observe the metallographic structure of the clinched specimens with heat treat鄄
    ment. The micro鄄hardness of metallographic specimens with heat treatment and non鄄heat treatment were also meas鄄
    ured. The results exhibited that compared with the clinched specimens with non鄄heat treatment, local heat treatment
    largened the degree of joint neck tear and the static strength increased by 16. 7%. The material structure of the
    clinched joints has changed from ferrite and pearlite to lath martensite after thermal treatment. In comparison to un鄄
    heated treatment, the micro鄄hardness of the new microstructure is increased by 12. 1%.

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王医锋.镀锌钢压印接头热处理后拉剪强度及组织形态[J].宇航材料工艺,2015,45(5).

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  • 在线发布日期: 2016-11-28
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