CAJ | 학술논문

4004铝合金具有良好的可焊性。然而，由于其Si含量较高，在凝固过程中会形成粗大的Si相而降低该合金的塑性，从而降低箔材的成品率。为了提高该合金的塑性和成品率，采用RE?Ba?Sb对4004铝合金进行复合变质处理。作为对比，对该合金亦采用不同含量稀土进行变质处理。对于单一稀土变质处理，当稀土加入量为0.2%时，材料的组织和性能达到最佳，此时材料的的抗拉强度为194 MPa，伸长率为5%。对于RE?Ba?Sb复合变质处理，变质剂的最佳加入量采用正交设计的方法而进行优化。结果表明，RE的加入量影响最大，其次是Ba的加入量，Sb的加入量影响最小。三种元素的最佳加入量分别为RE 0.01%，Ba 0.3%，Sb 0.05%，此时材料的抗拉强度为224 MPa，伸长率为6%。且复合变质中RE的加入量约为单一RE变质加入量的1/20。
4004려합금구유량호적가한성。연이，유우기Si함량교고，재응고과정중회형성조대적Si상이강저해합금적소성，종이강저박재적성품솔。위료제고해합금적소성화성품솔，채용RE?Ba?Sb대4004려합금진행복합변질처리。작위대비，대해합금역채용불동함량희토진행변질처리。대우단일희토변질처리，당희토가입량위0.2%시，재료적조직화성능체도최가，차시재료적적항랍강도위194 MPa，신장솔위5%。대우RE?Ba?Sb복합변질처리，변질제적최가가입량채용정교설계적방법이진행우화。결과표명，RE적가입량영향최대，기차시Ba적가입량，Sb적가입량영향최소。삼충원소적최가가입량분별위RE 0.01%，Ba 0.3%，Sb 0.05%，차시재료적항랍강도위224 MPa，신장솔위6%。차복합변질중RE적가입량약위단일RE변질가입량적1/20。
As a brazing foil, 4004 Al alloy has good welding performance. However, the high Si content decreases the plasticity of the alloy. In order to improve the plasticity of 4004 Al alloy and subsequently improve the productivity of 4004 Al foil, 4004 Al alloy was modified by RE?Ba?Sb. As a comparison, the 4004 Al alloy was also modified by RE with different addition. The tensile properties of the alloy reach the best when the addition of RE was 0.2%, in which the tensile strength and elongation were 194 MPa and 5%, respectively. For RE?Ba?Sb modification, the addition of three elements was optimized by orthogonal analysis. The results showed that the greatest impact parameter of RE?Ba?Sb modification was RE addition, followed by addition of Ba and Sb. The optimum addition amounts of RE, Ba and Sb obtained by orthogonal analyses were 0.01%, 0.3%, and 0.05%, respectively. The tensile strength and the elongation of 4004 Al alloy modified by the optimal modification process were 224 MPa and 6%, respectively. The amount of RE addition in RE?Ba?Sb modification is lower than that in RE modification.