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Cu和Sb元素添加对Sn-Bi共晶合金性能的影响
作者单位:

北京理工大学

中图分类号:

TG146.1+4

基金项目:

国家自然科学基金资助(3090021501912)


Effects of Cu and Sb Addition on Properties of Sn-Bi Eutectic Alloys
Author:
Affiliation:

Beijing institute of technology

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    摘要:

    向Sn-Bi共晶合金中同时添加Cu元素和Sb元素设计额定温度为142 ℃的易熔合金,并对合金的熔点、相组成、准静态拉伸性能、焊接接头力学性能进行了研究。结果表明Cu元素与Sb元素的添加使合金的熔点上升,但是合金的过冷度和熔化潜热下降。添加Cu和Sb元素后,在合金基体内形成了块状的SnSb相和长条状的Cu6Sn5、Cu3Sn相,这些第二相强化了合金的抗拉强度,但降低了合金的塑性。 (Sn58Bi)3Cu3Sb易熔合金强度为85.4 MPa,塑性为15.5%,熔点为141.8 ℃,其与覆铜板焊接接头的剪切强度较Sn-Bi共晶合金明显提高,可达到55.7 MPa。

    Abstract:

    In this paper, fusible alloy with rated temperature of 142℃ were designed by add Cu and Sb element into Sn-Bi eutectic alloy. Besides, the melting temperature, phase composition, quasi-static tensile properties and mechanical properties of solder joints were studied. The results show that the addition of Cu and Sb increases the melting point of the alloy, but the subcooling and latent heat of melting of the alloy decrease. After adding Cu and Sb elements, a bulk SnSb phase and long Cu6Sn5 and Cu3Sn phases were formed in the alloy matrix. These second phases strengthened the tensile strength of the alloy, but reduced the plasticity of the alloy. The strength of (Sn58Bi)3Cu3Sb fusible alloy is 85.4 MPa, the plasticity is 15.5%, and the melting point is 141.8 ℃. The shear strength of the welded joint with copper clad plate is significantly higher than that of Sn-Bi eutectic alloy, which can reach 55.7 MPa

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杨添淇,赵修臣,程荆卫,谭成文,于晓东,刘影夏. Cu和Sb元素添加对Sn-Bi共晶合金性能的影响[J].稀有金属材料与工程,2021,50(2):621~626.[Yang Tianqi, Zhao Xiuchen, Cheng Jingwei, Tan Chengwen, Yu Xiaodong, Liu Yingxia. Effects of Cu and Sb Addition on Properties of Sn-Bi Eutectic Alloys[J]. Rare Metal Materials and Engineering,2021,50(2):621~626.]
DOI:10.12442/j. issn.1002-185X.20200135

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  • 收稿日期:2020-02-29
  • 最后修改日期:2020-04-13
  • 录用日期:2020-04-17
  • 在线发布日期: 2021-03-09