退火温度对挤压态Zn-2Al钎料组织和性能的影响
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摘要
利用光学显微镜、扫描电子显微镜、X射线衍射、拉伸试验机、显微硬度计等试验方法和设备研究了退火温度对挤压态Zn-2Al钎料组织和性能的影响。结果表明:退火保温时间40 min条件下,横截面组织经100℃退火组织晶粒变得均匀细小,175℃时相较100℃组织无明显变化; 250℃时,出现细小的等轴晶,部分晶粒出现异常长大; 325℃时,晶粒长大,出现等轴晶;纵截面组织随着退火温度的升高,变形条带组织逐渐变宽,250℃时消失,条带组织逐渐变得均匀弥散。钎料的显微硬度与抗拉强度变化趋势类似,随着退火温度的升高先增大后减小再增大最后继续减小,经100℃退火后组织晶粒最为细小均匀;抗拉强度与显微硬度最高,分别为53. 5 MPa和43. 7 HV0. 025,综合力学性能最佳。
Effects of annealing temperature on microstructure and properties of extruded Zn-2 Al solder were investigated by OM,SEM,XRD,tensile test machine and microhardness tester. The results show that under the condition of annealing time 40 min,in the cross section microstructure the grains become even and finer when annealed at 100 ℃,and there is no further obvious change in the microstructure when annealed at 175 ℃. There are fine equiaxed grains except for some grains grow abnormally when annealed at 250 ℃. The grains grow up and become equiaxed when annealed at 325 ℃. With the increase of annealing temperature,the banded structure in vertical section becomes wider and wider,and disappears when annealed at 250 ℃,the microstructure gradually becomes uniform and dispersive. The microhardness and tensile strength of the brazing alloy have similar trend,they increase first and then decrease with the increase of annealing temperature.When annealed at 100 ℃,the microstructure is the most uniform and the grains are the finest,the tensile strength and microhardness are the highest,respectively 53. 5 MPa and 43. 7 HV0. 025,and the comprehensive mechanical properties are the best.
Effects of annealing temperature on microstructure and properties of extruded Zn-2 Al solder were investigated by OM,SEM,XRD,tensile test machine and microhardness tester. The results show that under the condition of annealing time 40 min,in the cross section microstructure the grains become even and finer when annealed at 100 ℃,and there is no further obvious change in the microstructure when annealed at 175 ℃. There are fine equiaxed grains except for some grains grow abnormally when annealed at 250 ℃. The grains grow up and become equiaxed when annealed at 325 ℃. With the increase of annealing temperature,the banded structure in vertical section becomes wider and wider,and disappears when annealed at 250 ℃,the microstructure gradually becomes uniform and dispersive. The microhardness and tensile strength of the brazing alloy have similar trend,they increase first and then decrease with the increase of annealing temperature.When annealed at 100 ℃,the microstructure is the most uniform and the grains are the finest,the tensile strength and microhardness are the highest,respectively 53. 5 MPa and 43. 7 HV0. 025,and the comprehensive mechanical properties are the best.
引文
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[13]刘明星,聂金凤,赵永好.热处理对累积叠轧制备Al/Mg/Al复合板材微观组织演变及力学性能的影响[J].热加工工艺,2018,47(2):154-157.Liu Mingxing,Nie Jinfeng,Zhao Yonghao. Effect of Heat Treatment on Microstructure Evolution and Mechanical Properties of Al/Mg/Al Compound Board Prepared by ARB Process[J]. Hot Working Technology,2018,47(2):154-157.
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[15]李晓迪,张冠星,孙华为,等.退火温度对轧制态钎料BAg30Cu Zn Sn组织和性能的影响[J].金属热处理,2018,43(11):155-159.Li Xiaodi,Zhang Guangxing,Sun Huawei,et al. Effect of annealing temperature on microstructure and properties of rolled BAg30CuZnSn filler metal[J]. Heat Treatment of Metals,2018,43(11):155-159.
[2]赵快乐. Zn基新型高温无铅软钎料研究[D].洛阳:河南科技大学,2012.Zhao Kuaile. Study of a novel zn based high temperature Pb-free solder[D]. Luoyang:Henan University of Science and Technology,2012.
[3] Dai Wei,Xue Songbai,Lou Jiyuan,et al. Torch brazing 3003aluminum alloy with Zn-Al filler metal[J]. Transactions of Nonferrous Metals Society of China,2012,22(1):30-35.
[4]李秀朋,龙伟民,沈元勋,等.烧结时间对自钎剂钎料显微组织和力学性能的影响[J].焊接学报,2014,35(7):59-62,116.Li Xinpeng,Long Weimin,Shen Yuanxun,et al. Effect of sintering time properties of self-fluxing on microstructure and mechanical filler metal[J]. Transactions of the China Welding Institution,2014,35(7):59-62,116
[5]吕登峰,龙伟民,张冠星,等.湿热环境对Zn-2Al钎料显微组织及力学性能的影响[J].焊接学报,2014,35(11):63-66,116.LüDengfeng, Long Weimin, Zhang Guanxing, et al. Effect of hygrothermal environment on microstructure and mechanical properties of Zn-2Al filler metal[J]. Transactions of the China Welding Institution,2014,35(11):63-66,116.
[6]鲍丽,龙伟民,张冠星,等.微量Ca元素对Ag CuZn钎料性能的影响[J].焊接学报,2012,33(12):57-60,115-116.Bao Li,Long Weimin,Zhang Guanxing,et al. Effect of trace calcium on performance of Ag CuZn alloy[J]. Transactions of the China Welding Institution,2012,33(12):57-60,115-116.
[7]陈文学,薛松柏,王慧,等. Sn-9Zn-x Al无铅钎料润湿性能[J].焊接学报,2008(8):37-40,44.Chen Wenxue,Xue Songbai,Wang Hui,et al. Wettability of lead-free solders of Sn-Zn-x Al[J]. Transactions of the China Welding Institution,2008(8):37-40,44.
[8]张冠星,龙伟民,潘建军,等.氧含量对银基粉状钎料润湿性及钎缝力学性能的影响[J].焊接学报,2014,35(3):81-84,117.Zhang Guanxing,Long Weimin,Pan Jianjun,et al. Effect of oxygen content on wettability and mechanical property of brazing seam for silver based powdered brazing filler metal[J]. Transactions of the China Welding Institution,2014,35(3):81-84,117.
[9]张德芬,谭盖,陈孝文,等. 2A12/7075异种铝合金搅拌摩擦焊接头的组织及性能[J].金属热处理,2017,42(2):49-53.Zhang Defen,Tan Gai,Chen Xiaowen, et al. Microstructure and properties of friction stir welding joint of dissimilar 2A12 and 7075aluminum alloy[J]. Heat Treatment of Metals,2017,42(2):49-53.
[10]王建,王杰芳,郭巧能,等. Al-Cu-Mg-Ag合金热处理工艺的研究进展[J].金属热处理,2015,40(3):163-168.Wang Jian,Wang Jiefang,Guo Qiaoneng,et al. Research progress of heat treatment process of Al-Cu-Mg-Ag alloys[J]. Heat Treatment of Metals,2015,40(3):163-168.
[11]王斌,朱加祥,周翠,等. 5052与6061异种铝合金搅拌摩擦焊接头的组织和力学性能[J].金属热处理,2015,40(1):55-59.Wang Bin,Zhu Jiaxiang,Zhou Cui,et al. Microstructure and mechanical properties of 5052-6061 dissimilar Al alloy welded joint by friction stir welding[J]. Heat Treatment of Metals,2015,40(1):55-59.
[12]潘健生,顾剑锋,王婧.我国热处理发展战略的探讨[J].金属热处理,2013,38(1):4-14.Pan Jiansheng,Gu Jianfeng,Wand Jing. Discussion of heat treatment development strategy in China[J]. Heat Treatment of Metals,2013,38(1):4-14.
[13]刘明星,聂金凤,赵永好.热处理对累积叠轧制备Al/Mg/Al复合板材微观组织演变及力学性能的影响[J].热加工工艺,2018,47(2):154-157.Liu Mingxing,Nie Jinfeng,Zhao Yonghao. Effect of Heat Treatment on Microstructure Evolution and Mechanical Properties of Al/Mg/Al Compound Board Prepared by ARB Process[J]. Hot Working Technology,2018,47(2):154-157.
[14]杜春平,王培吉.焊后热处理对Al-Zn-Mg合金焊接接头组织与性能的影响[J].中国有色金属学报,2017,27(12):2483-2492.Du Chunping,Wang Peiji. Effect of post-welding heat treatment on microstructure and properties of AI-Zn-Mg alloy welded joint[J]. The Chinese Journal of Nonferrous Metals,2017,27(12):2483-2492.
[15]李晓迪,张冠星,孙华为,等.退火温度对轧制态钎料BAg30Cu Zn Sn组织和性能的影响[J].金属热处理,2018,43(11):155-159.Li Xiaodi,Zhang Guangxing,Sun Huawei,et al. Effect of annealing temperature on microstructure and properties of rolled BAg30CuZnSn filler metal[J]. Heat Treatment of Metals,2018,43(11):155-159.