The Effect of Carbon Content in Filling Alloys on η Phase Formation in the Interface Zone of YG30 and Weld Bead

被引：1

作者：

Zhao, Xiujuan ^{[1
]}

Chen, Chunhuan ^{[1
]}

Sun, Yuan ^{[1
]}

Yang, Dexin ^{[1
]}

Tagashira, Kohsuke ^{[2
]}

机构：

[1] Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China

[2] Muroran Inst Technol, Murroran 0508585, Japan

来源：

MANUFACTURING PROCESS TECHNOLOGY, PTS 1-5 | 2011年 / 189-193卷

关键词：

eta Phases; Tungsten-Inert-Gas Arc Welding; Cemented Carbide YG30;

D O I：

10.4028/www.scientific.net/AMR.189-193.3309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The cemented carbide YG30 and steel 1045 were welded with Co-Fe-C filling alloys with different carbon contents by the tungsten-inert-gas (TIG) arc welding. eta phase formation at the welding joints was investigated through scanning electronic microscopy (SEM). The results show that the average composition of eta phase is W-25, Fe-22, Co-19, C-24 (mass, %), which is a kind of carbide enriched by Fe, W, and Co. The amount of eta phase formed near the interface of YG30 and weld bead is related to the C content in the filling alloy. Namely the amount of eta phase decreases with the increasing of the C content in the filling metal. When the C content reaches to 0.8 wt%, no eta phase forms. The reason of which is that the added C reduces and/or restrains the resolving of the WC that locates at the interface, so that inhibit the W and C to form eta phase with Fe and Co. The existence of large-size eta phase near the interface is mainly attributed to the aggregation of small size eta phase with the unsolved WC due to the stir of liquid metal, and then growing up.

引用

页码：3309 / +

页数：2