变质处理对Al-0.4Mn合金导电性能的影响机制
Effect Mechanism of Modification Process on Electrical Conductivity of Al-0.4Mn Alloy
摘 要
采用硼和稀土元素钇、钐、铈对Al-0.4Mn合金进行变质处理,研究了变质处理对合金导电性能的影响机制。结果表明:单一元素变质时,适量硼或钇元素对Al-0.4Mn合金具有良好的变质效果,合金的最高电导率分别达26.13,25.32 MS·m-1,比未变质合金分别提高了6.80%和3.47%,铈和钐元素则会降低合金的电导率;质量分数0.3%硼+0.5%钇复合变质对合金电导率的提升效果更佳,其电导率为26.64 MS·m-1,比未变质合金提高了8.90%;当质量分数0.3%硼+0.5%钇复合变质时,因硼化作用析出的AlB2同时吸附锰和钇,促进掺杂型硼化物和Al-Mn-Y相的析出,部分钇形成的Al3Y对锰有一定的吸附作用,二者共同作用进一步降低锰在铝中的固溶量以及基体的晶格畸变程度,从而显著提高合金的导电性能。
电导率
变质处理
晶格畸变
Al-Mn alloy
electrical conductivity
modification
lattice distortion
Abstract
Al-0.4Mn alloy was modified by B and rare earth element Y, Sm and Ce. The influence mechanism of modified elements on the electrical conductivity of the alloy was studied. The results show that Al-0.4Mn alloy could be effectively modified by right content of B or Y element when the single element was added into the alloy, and the largest electrical conductivities of alloy were 26.13, 25.32 MS·m-1, improving by 6.80% and 3.47% that of unmodified alloy, respectively. Ce and Sm elements would reduce the electrical conductivity of the alloy. The composite modification of 0.3wt% B +0.5wt% Y had a better effect on improving the electrical conductivity of the alloy; the electrical conductivity was 26.64 MS·m-1, improving by 8.9% that of unmodified alloy. When the alloy was composite modified by 0.3wt% B +0.5wt% Y, the precipitated AlB2 by borylation adsorbed Mn and Y at the same time, promoting the precipitation of doped borides and Al-Mn-Y phase; part of the Al3Y formed by Y had a certain adsorption effect on Mn, which further reduced the solid solution amount of Mn in the aluminum and lattice distortion of the substrate, and significantly improved the electrical conductivity of the alloy.
中图分类号 TG146.2 DOI 10.11973/jxgccl202208014
所属栏目 材料性能及应用
基金项目 广东华昌集团有限公司委托开发项目(20200608)
收稿日期 2021/5/29
修改稿日期 2022/7/8
网络出版日期
作者单位点击查看
备注郭加林(1982-),男,安徽桐城人,工程师,硕士
引用该论文: GUO Jialin,LIU Jing,LUO Gan,DU Jun,ZHOU Mingjun. Effect Mechanism of Modification Process on Electrical Conductivity of Al-0.4Mn Alloy[J]. Materials for mechancial engineering, 2022, 46(8): 89～93
郭加林,刘静,罗干,杜军,周明君. 变质处理对Al-0.4Mn合金导电性能的影响机制[J]. 机械工程材料, 2022, 46(8): 89～93
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【9】王波,刘让贤,余洪伟,等.Al-5Ti-1B细化剂添加量对含铈铸造铝合金组织和拉伸性能的影响[J].机械工程材料,2020,44(5):21-27.WANG B,LIU R X,YU H W,et al.Effect of Al-5Ti-1B refiner addition amount on microstructure and tensile properties of cast aluminum alloy containing Ce[J].Materials for Mechanical Engineering,2020,44(5):21-27.
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