6Sn5、Cu3Sn相,這些第二相強(qiáng)化了合金的抗拉強(qiáng)度,但降低了合金的塑性。 (Sn58Bi)3Cu3Sb易熔合金強(qiáng)度為85.4 MPa,塑性為15.5%,熔點(diǎn)為141.8 ℃,其與覆銅板焊接接頭的剪切強(qiáng)度較Sn-Bi共晶合金明顯提高,可達(dá)到55.7 MPa。"/>

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Cu和Sb元素添加對Sn-Bi共晶合金性能的影響
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北京理工大學(xué)

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TG146.1+4

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國家自然科學(xué)基金資助(3090021501912)


Effects of Cu and Sb Addition on Properties of Sn-Bi Eutectic Alloys
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Beijing institute of technology

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    摘要:

    向Sn-Bi共晶合金中同時添加Cu元素和Sb元素設(shè)計(jì)額定溫度為142 ℃的易熔合金,并對合金的熔點(diǎn)、相組成、準(zhǔn)靜態(tài)拉伸性能、焊接接頭力學(xué)性能進(jìn)行了研究。結(jié)果表明Cu元素與Sb元素的添加使合金的熔點(diǎn)上升,但是合金的過冷度和熔化潛熱下降。添加Cu和Sb元素后,在合金基體內(nèi)形成了塊狀的SnSb相和長條狀的Cu6Sn5、Cu3Sn相,這些第二相強(qiáng)化了合金的抗拉強(qiáng)度,但降低了合金的塑性。 (Sn58Bi)3Cu3Sb易熔合金強(qiáng)度為85.4 MPa,塑性為15.5%,熔點(diǎn)為141.8 ℃,其與覆銅板焊接接頭的剪切強(qiáng)度較Sn-Bi共晶合金明顯提高,可達(dá)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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楊添淇,趙修臣,程荊衛(wèi),譚成文,于曉東,劉影夏. Cu和Sb元素添加對Sn-Bi共晶合金性能的影響[J].稀有金屬材料與工程,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
  • 錄用日期:2020-04-17
  • 在線發(fā)布日期: 2021-03-09
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