Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第21卷    第3期    总第144期    2011年3月

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文章编号:1004-0609(2011)03-0663-06
埋弧堆焊TiC颗粒增强复合涂层的组织与性能
刘均海1, 2, 黄继华1, 刘均波3, 宋桂香4

(1. 北京科技大学 材料科学与工程学院,北京100083; 2. 威海职业学院 机电工程系,威海264210;
3. 潍坊学院 机电工程系,潍坊261041; 4. 威海职业学院 职业技能实训中心,威海264210
)

摘 要:

 

关键字: 埋弧堆焊;TiC颗粒;涂层;原位合成

Microstructure and performance of
submerged-arc weld clad TiC particle reinforced composite coating
LIU Jun-hai1, 2, HUANG Ji-hua1, LIU Jun-bo3, SONG Gui-xiang4

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Department of Mechanical and Electronic Engineering, Weihai Vocational College, Weihai 264210, China;
3. Department of Mechanical and Electronic Engineering, Weifang University, Weifang 261041, China;
4. Department of Vocational Skills Training Center, Weihai Vocational College, Weihai 264210, China

Abstract:TiC particle reinforced Fe-based composite coatings were in situ synthesized on the surface of Q235 steel by submerged-arc welding(SAW) using mixture of TiFe, Cr, Ni, Fe and colloidal graphite powers, etc. Microstructures of the coatings were observed by scanning electron microscopy (SEM), the phases in the coatings were determined by X-ray diffractometery (XRD), and the wear resistance of the composite coatings was evaluated under dry sliding wear test conditions at room temperature. The results indicate that the fine TiC particles with diameter less than 2 μm are synthesized by using submerged-arc welding process and distributed in the matrix. The coating consists of TiC particles, martensite and austenite. The microhardness of the coating is 601HV0.2, which is 3 times larger than that of the base material. The wear mass loss of Q235 base material is 10 times more than that of the coating. Compared with the single-layer composite coating, the double composite coating shows better wear resistance due to the increase of austenite and TiC content and the decrease of martensite content.

 

Key words: submerged-arc welding; TiC; coating layer; in situ synthesis

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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