Ti-47Al-2Nb-2Cr-0.15B(mole fraction,%)alloy was vacuum brazed with amorphous and crystalline Ti.25Zr-12.5Cu-12.5Ni-3.0Co-2.0Mo(mass fraction,%)filler alloys,and the melting,spreading and gap filling behaviors of the a...Ti-47Al-2Nb-2Cr-0.15B(mole fraction,%)alloy was vacuum brazed with amorphous and crystalline Ti.25Zr-12.5Cu-12.5Ni-3.0Co-2.0Mo(mass fraction,%)filler alloys,and the melting,spreading and gap filling behaviors of the amorphous and crystalline filler alloys as well as the joints brazed with them were investigated in details.Results showed that the amorphous filler alloy possessed narrower melting temperature interval,lower liquidus temperature and melting active energy compared with the crystalline filler alloy,and it also exhibited better brazeability on the surface of the Ti.47Al.2Nb.2Cr.0.15B alloy.The TiAl joints brazed with crystalline and amorphous filler alloys were composed of two interfacial reaction layers and a central brazed layer.Under the same conditions,the tensile strength of the joint brazed with the amorphous filler alloy was always higher than that with the crystalline filler alloy.The maxmium tensile strength of the joint brazed at 1273 K with the amorphous filler alloy reached 254 MPa.展开更多
为了满足在990~1010℃温度下钎焊不锈钢的需要,研究了一种Ni-Mn-Si-Cu-B-Ce钎料。对钎料的熔化特性和润湿性、接头组织以及钎焊搭接接头的剪切强度进行了研究。结果表明微量元素B、Ce元素可使BNi66Mn Si Cu钎料的熔化温度显著降低,从而...为了满足在990~1010℃温度下钎焊不锈钢的需要,研究了一种Ni-Mn-Si-Cu-B-Ce钎料。对钎料的熔化特性和润湿性、接头组织以及钎焊搭接接头的剪切强度进行了研究。结果表明微量元素B、Ce元素可使BNi66Mn Si Cu钎料的熔化温度显著降低,从而满足在990~1010℃温度下钎焊不锈钢,加入微量元素B、Ce元素后使钎料对1Cr18Ni9Ti不锈钢的润湿性影响较小,但钎料的剪切强度提高约1.3倍,利用Ni-Mn-Si-Cu-B-Ce钎料在钎焊1Cr18Ni9Ti不锈钢后,发生了互扩散效应,钎料与母材之间形成了牢固的扩散层;在Ni-Mn-Si-Cu-B-Ce钎料显微组织中,主要存在Ni基固溶体（溶解有微量的Cu）以及Cu_9Si、Mn Si、Mn_6Ni_16Si_7等化合物相。展开更多
基金Foundation item:Project(51865012)supported by the National Natural Science Foundation of ChinaProject(2016005)supported by the Open Foundation of National Engineering Research Center of Near-net-shape Forming for Metallic Materials,China+2 种基金Project(GJJ170372)supported by the Science Foundation of Educational Department of Jiangxi Province,ChinaProject(JCKY2016603C003)supported by the GF Basic Research Project,ChinaProject(JPPT125GH038)supported by the Research Project of Special Furnishment and Part,China
文摘Ti-47Al-2Nb-2Cr-0.15B(mole fraction,%)alloy was vacuum brazed with amorphous and crystalline Ti.25Zr-12.5Cu-12.5Ni-3.0Co-2.0Mo(mass fraction,%)filler alloys,and the melting,spreading and gap filling behaviors of the amorphous and crystalline filler alloys as well as the joints brazed with them were investigated in details.Results showed that the amorphous filler alloy possessed narrower melting temperature interval,lower liquidus temperature and melting active energy compared with the crystalline filler alloy,and it also exhibited better brazeability on the surface of the Ti.47Al.2Nb.2Cr.0.15B alloy.The TiAl joints brazed with crystalline and amorphous filler alloys were composed of two interfacial reaction layers and a central brazed layer.Under the same conditions,the tensile strength of the joint brazed with the amorphous filler alloy was always higher than that with the crystalline filler alloy.The maxmium tensile strength of the joint brazed at 1273 K with the amorphous filler alloy reached 254 MPa.
文摘为了满足在990~1010℃温度下钎焊不锈钢的需要,研究了一种Ni-Mn-Si-Cu-B-Ce钎料。对钎料的熔化特性和润湿性、接头组织以及钎焊搭接接头的剪切强度进行了研究。结果表明微量元素B、Ce元素可使BNi66Mn Si Cu钎料的熔化温度显著降低,从而满足在990~1010℃温度下钎焊不锈钢,加入微量元素B、Ce元素后使钎料对1Cr18Ni9Ti不锈钢的润湿性影响较小,但钎料的剪切强度提高约1.3倍,利用Ni-Mn-Si-Cu-B-Ce钎料在钎焊1Cr18Ni9Ti不锈钢后,发生了互扩散效应,钎料与母材之间形成了牢固的扩散层;在Ni-Mn-Si-Cu-B-Ce钎料显微组织中,主要存在Ni基固溶体（溶解有微量的Cu）以及Cu_9Si、Mn Si、Mn_6Ni_16Si_7等化合物相。
