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以Ti-Ni合金作为填加材料,采用氮氩混合等离子气对SiCp/Al基复合材料进行等离子弧原位焊接。结果表明,填加Ti-Ni合金进行等离子弧原位焊接,在焊缝组织中生成了新的增强颗粒TiN,TiC,A1N,Al3Ti和Al3Ni,未发现明显的针状相生成,有效的抑制了脆性相Al4G3并且接头组织致密,结合较好。Ni元素的添加,降低了SiC溶解程度,使得熔池中的结晶热显著提高,改善了熔池的流动性。同时在焊缝组织中形成了新的增强相AlNi,Al3Ni,从而有效地提高接头的力学性能。采用Ti-Ni合金进行等离子弧原位焊接,接头的抗拉强度为215.4MPa,达到母材强度的67.3%。 相似文献
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以Ti-Ni合金作为填加材料,采用氮氩混合等离子气对SiCp/Al基复合材料进行等离子弧原位焊接.结果表明,填加Ti-Ni合金进行等离子弧原位焊接,在焊缝组织中生成了新的增强颗粒TiN,TiC,AIN,Al3Ti和Al3Ni未发现明显的针状相生成,有效的抑制了脆性相Al4C3,并且接头组织致密,结合较好.Ni元素的添加,降低了SiC溶解程度,使得熔池中的结晶热显著提高,改善了熔池的流动性.同时在焊缝组织中形成了新的增强相AlNi,Al3Ni,从而有效地提高接头的力学性能.采用Ti-Ni合金进行等离子弧原位焊接,接头的抗拉强度为215.4MPa,达到母材强度的67.3%. 相似文献
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Ti-Al合金对SiCp/6061Al复合材料等离子弧焊焊缝组织的影响 总被引:1,自引:0,他引:1
以不同Ti含量的Ti-Al合金作为合金化填加材料,采用氮氩混合等离子气体对SiCp/6061Al复合材料进行等离子弧原位焊接,研究填加材料Ti-Al中Ti质量分数的变化对焊缝组织的影响.结果表明:在熔池凝固过程中,填加材料中Ti质量分数为10%时,可有效抑制有害针状相Al4C3的生成;随填加材料中Ti质量分数的降低,焊缝中未出现脆性相Al4C3,组织中颗粒相的形貌发生较大变化,Al3Ti相的形状由粗大块状变为细长针状,并且数量大为减少;焊缝中其余增强相的尺寸均变得较为细小. 相似文献
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The effect of Ti-Al on microstructures and mechanical properties of SiCp/Al MMC joints produced by plasma arc in-situ weld-alloying was investigated, in which argon-nitrogen mixture was used as plasma gases and Ti-Al alloy as filling composite. The results show that the formation of needle-like harmful phase Al4C3 is effectively prevented in the weld by in-situ weld-alloying/plasma arc welding with Ti-Al alloy sheet filler whose titanium content is more than 20%. The fluidity of molten pool is improved, and stable molten pool is gained for the addition of the Ti-A1 alloy. The mechanical properties of welded joint are effectively enhanced by the compact-grain structure and the new reinforced composites such as Al3Ti, TiN, AlN and TiC welded joint The test results of mechanical property show that the maximum tensile strength of welded joint gained by adding Ti-60Al alloy is up to 235 MPa. The factors influencing the tensile strength were also investigated. 相似文献
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Recalescence behaviour of rapid solidification in the deeply undercooled Ni-B hypereutectic alloy and formation mechanism of anomalous eutectic 总被引:1,自引:0,他引:1
以Ti--Al--Si合金作为合金化填充材料,
用氮氩混合等离子气体对SiCp/Al基复合材料进行等离子弧原位焊接,
研究了Ti-Al-Si对焊缝的组织和性能的影响. 结果表明: 填加Ti-75Al-5Si合金时,
熔池中Si和Ti的联合作用有效抑地制了针状脆生相Al4C3的生成,
形成了稳定的熔池, 得到了以TiN、AlN 、TiC和Ti5Si3等为二次增强相的焊缝.
焊缝的组织致密, 结合良好, 其最大拉伸强度为225 MPa 相似文献
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