Microstructure and strength of TiAl/steel joint induction brazed with Ag-Cu-Ti filler metal

被引：5

作者：

Feng, JC ^{[1
]}

Li, YL ^{[1
]}

He, P ^{[1
]}

Liu, HJ ^{[1
]}

Yan, JC ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding Prod Technol, Harbin 150001, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2005年 / 21卷 / 02期

关键词：

induction brazing; microstructure; TiAl; intermetallics; Ag-Cu-Ti filler metal;

D O I：

10.1179/174328405X18548

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Intermetallic TiAl was induction brazed to steel in an induction furnace with Ag-Cu-Ti filler metal at 1143 K for 0.2-2.4 ks. Microstructural analysis indicates that Ti, AI, and C atoms in base metal diffuse to the interface and react strongly with the filler metal during brazing. The interface structure of the joint can be divided into three distinct zones: the reaction layer near TA, composed of Cu-Al-Ti compounds and Ag based solid solutions; the central zone of the interface, consisting of Ag based solid solutions in which Ag-Cu eutectic phases are dispersed; a TiC reaction layer adjacent to the steel. The relationship between brazing parameters and tensile strength of the joints is discussed, and the optimum induction brazing parameters obtained. When brazed at 1143 K for 0.9 ks, the tensile strength of the joint is 298 MPa.

引用

页码：255 / 258

页数：4

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