王微,王春香,王刚

• 1:安徽机电职业技术学院机械工程系
• 2:安徽工程大学机械与汽车工程学院

摘要(Abstract)：

为改善YG8硬质合金与45钢的焊接性能,采用Cu_(39.37)Ti_(32.19)Zr_(19.38)Ni_(9.06)(at%)非晶态钎料对YG8硬质合金和45钢进行钎焊。通过XRD、SEM、万能试验机对钎料的微观结构以及钎焊接头形貌、析出相和力学性能进行分析。结果表明:在一定钎焊温度下,随钎焊时间的增加,接头强度逐渐减小,有明显的裂纹,且裂纹在YG8硬质合金一侧反应层中萌生并扩展。在钎焊温度900℃,钎焊时间10 min时获得的抗拉强度最高,约为250 MPa。焊接头强度与YG8硬质合金一侧形成的反应层厚度有关。通过计算得到了反应层厚度形成的激活能Q和反应层生长速度A_0。

关键词(KeyWords)： 钎焊;非晶钎料;结合强度;反应层厚度

Abstract:

Keywords:

基金项目(Foundation): 2014年安徽省质量工程项目(2014jxtd098);; 安徽省自然科学基金(1508085SQE210);; 安徽机电职业技术学院院级自然科学项目(2015yjzr04)

作者(Author): 王微,王春香,王刚

DOI: 10.13289/j.issn.1009-6264.2017.03.020

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