Zn-Cu-Ti合金搅拌摩擦焊与激光焊接头组织与性能对比研究
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摘要
通过金相显微镜、扫描电镜和显微硬度测试等分析手段,研究了Zn-Cu-Ti合金搅拌摩擦焊接头与激光焊接头的组织和性能。结果表明,Zn-Cu-Ti合金搅拌摩擦焊接头主要分为母材区、热机影响区、焊核区,其显微组织分别为纤维组织、拉伸弯曲变形组织、细小的晶粒;接头各区域硬度分布为:母材区>热机影响区>焊核区;接头的抗拉强度153.8 MPa,延伸率为6.7%,发生偏向脆断的准解理断裂。激光焊接头主要分为母材区、熔合区、焊缝区,焊缝区中心位置上下表面有凹坑,其内部有多条排列规则且形状近似抛物线的熔合线,并存在较明显的夹杂;接头各区域硬度分布为:母材区<熔合区<焊缝区;接头的抗拉强度为110.3 MPa,延伸率仅为4.7%,发生脆性断裂。
The microstructure and properties of the joints of Zn-Cu-Ti alloy prepared by friction stir welding(FSW) and laser welding were investigated by means of OM, SEM and micro-hardness testing. The results showed that the FSW joint was mainly divided into parent material zone(PMZ), thermal-mechanically affected zone(TMAZ) and weld nugget zone(WNZ), being of fiber structure, tensile and bending deformation structure, as well as fine and dense grain structure, respectively. Moreover, the hardness distribution of each part of the joint was in the following order: PMZ>TMAZ>WNZ. In addition, the FSW joint had the tensile strength of 153.8 MPa and the elongation of 6.7%, and the quasi-cleavage fracture trending toward brittle was observed. While the laser welded joint was mainly divided into PMZ, fusion zone and weld zone. The weld zone had tiny dents on the upper and lower part of surfaces. There were many fusion lines in regular arrangement with shape similar to parabola, and some obvious inclusions in the weld zone. The hardness distribution of each part of the joint was in the following order: PMZ
The microstructure and properties of the joints of Zn-Cu-Ti alloy prepared by friction stir welding(FSW) and laser welding were investigated by means of OM, SEM and micro-hardness testing. The results showed that the FSW joint was mainly divided into parent material zone(PMZ), thermal-mechanically affected zone(TMAZ) and weld nugget zone(WNZ), being of fiber structure, tensile and bending deformation structure, as well as fine and dense grain structure, respectively. Moreover, the hardness distribution of each part of the joint was in the following order: PMZ>TMAZ>WNZ. In addition, the FSW joint had the tensile strength of 153.8 MPa and the elongation of 6.7%, and the quasi-cleavage fracture trending toward brittle was observed. While the laser welded joint was mainly divided into PMZ, fusion zone and weld zone. The weld zone had tiny dents on the upper and lower part of surfaces. There were many fusion lines in regular arrangement with shape similar to parabola, and some obvious inclusions in the weld zone. The hardness distribution of each part of the joint was in the following order: PMZ
引文
[1] 孙连超,田荣璋.锌及锌合金物理冶金学[M].长沙:中南工业大学出版社,1994.
[2] 冀盛亚,梁淑华,宋克兴,等.Zn-Cu-Ti合金研究现状及发展方向[J].热加工工艺,2016(12):5-8.
[3] 刘盛,袁武华,孙莉.热处理工艺对Al-7Si-0.35Mg-3.6Cu-0.15Ce合金显微组织和力学性能的影响[J].矿冶工程,2015,35(4):119-121.
[4] 张俊,宋练鹏,袁远.形变热处理对Cu-Co-Cr-Si合金组织和性能的影响[J].矿冶工程,2008,28(5):86-88.
[5] 田莉莉,常学斌,周英杰,等.5083铝合金搅拌摩擦焊接头的显微组织与力学性能[J].理化检验(物理分册),2013(4):225-228.
[6] 吴兴欢,赖春明,周家林,等.6061-T651铝合金搅拌摩擦焊接头的显微组织和力学性能[J].热加工工艺,2017(17):238-242.
[7] 张骁,王敏,张会杰,等.薄板铝铜搭接搅拌摩擦焊工艺[J].精密成形工程,2017,9(5):187-191.
[8] 高福洋,高奇,郁炎,等.镁合金搅拌摩擦焊接组织特征研究[J].材料开发与应用,2017,31(1):67-72.
[9] 续敏,李向荣,杨化林.5052铝合金激光焊接接头组织和性能研究[J].热加工工艺,2017(1):236-237.
[10] 彭小敏,孙玮,夏长清.BTi-62421s合金板钨极氩弧焊接头组织性能研究[J].矿冶工程,2013,33(5):119-123.
[11] 谢丽初,全亚杰.镁合金的激光加工现状与发展[J].矿冶工程,2012,32(6):120-124.
[12] 齐果,甄立玲,张立君,等.变形锌合金闪光对焊焊接工艺研究[J].兵器材料科学与工程,2010,33(6):78-80.
[13] 孙福洋,杨旭,郭清超,等.锌基合金激光焊焊接接头组织和性能的研究[J].热加工工艺,2016(23):190-192.
[2] 冀盛亚,梁淑华,宋克兴,等.Zn-Cu-Ti合金研究现状及发展方向[J].热加工工艺,2016(12):5-8.
[3] 刘盛,袁武华,孙莉.热处理工艺对Al-7Si-0.35Mg-3.6Cu-0.15Ce合金显微组织和力学性能的影响[J].矿冶工程,2015,35(4):119-121.
[4] 张俊,宋练鹏,袁远.形变热处理对Cu-Co-Cr-Si合金组织和性能的影响[J].矿冶工程,2008,28(5):86-88.
[5] 田莉莉,常学斌,周英杰,等.5083铝合金搅拌摩擦焊接头的显微组织与力学性能[J].理化检验(物理分册),2013(4):225-228.
[6] 吴兴欢,赖春明,周家林,等.6061-T651铝合金搅拌摩擦焊接头的显微组织和力学性能[J].热加工工艺,2017(17):238-242.
[7] 张骁,王敏,张会杰,等.薄板铝铜搭接搅拌摩擦焊工艺[J].精密成形工程,2017,9(5):187-191.
[8] 高福洋,高奇,郁炎,等.镁合金搅拌摩擦焊接组织特征研究[J].材料开发与应用,2017,31(1):67-72.
[9] 续敏,李向荣,杨化林.5052铝合金激光焊接接头组织和性能研究[J].热加工工艺,2017(1):236-237.
[10] 彭小敏,孙玮,夏长清.BTi-62421s合金板钨极氩弧焊接头组织性能研究[J].矿冶工程,2013,33(5):119-123.
[11] 谢丽初,全亚杰.镁合金的激光加工现状与发展[J].矿冶工程,2012,32(6):120-124.
[12] 齐果,甄立玲,张立君,等.变形锌合金闪光对焊焊接工艺研究[J].兵器材料科学与工程,2010,33(6):78-80.
[13] 孙福洋,杨旭,郭清超,等.锌基合金激光焊焊接接头组织和性能的研究[J].热加工工艺,2016(23):190-192.