Microstructure and Fracture Morphology in the Welding Zone of T91 Heat-resisting Steel Used in Power Station

材料科学技术（英）, 2002, 18(5): 427-430.

^1, , ^2, , ^3, , ^4,

1.National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China;Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

2.Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

3.Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

4.Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

基金项目: the Foundation of National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, China

Microstructure and Fracture Morphology in the Welding Zone of T91 Heat-resisting Steel Used in Power Station

Keywords： T91 heat-resistant steel

Microstructure performance in the welding zone of T91 heat-resistant steel under the condition of TIG welding wasresearched by means of metallography, X-ray diffraction and scanning electron microscope (SEM). Experimentalresults indicated that microstructure of T91 weld metal was austenite + a little amount of δ ferrite when using TGS-9cb filler wire. Substructure inside the austenite grain was crypto-crystal lath martensite, on which some Cr23C6blocky carbides were distributed. The maximum hardness (HRC44) in the welding zone is near the fusion zone. Thereexisted no obvious softening zone in the heat-affected zone (HAZ). For T91 steel tube of φ63 mmx5 mm, whenincreasing welding heat input (E) from 4.8 kJ/cm to 12.5 kJ/cm, fracture morphology in the fusion zone and theHAZ changed from dimple fracture into quasi-cleavage fracture (QC). Controlling the welding heat input of about9.8 kJ/cm is suitable in the welding of T91 heat-resistant steel.

参考文献

[1]	Yunqing HUANG;Boli CHEN .[J].中国焊接,1995,4(02):31.
[2]	Dazhan GUO;Fenlan LI;Ruihua ZHU .[J].西安交通大学学报,1998,32(02):66.
[3]	Tongfen WANG .[J].Welding(in Chinese),1995,1(01):8.
[4]	J Brozda;M Zeman .[J].Welding Research Abroad,1995,9(12):33.
[5]	J Brozda;M Zeman .[J].Welding Research Abroad,1996,10(05):58.
[6]	Xin LONG;Yonggang XU;Guangjun CAI .[J].Transactions of the China Welding Institution(in Chinese),2000,21(01):53.
[7]	H Isaki;O Kabayashi;R Yoichikume .[J].Transactions of Japan Welding Society,1988,19(02):63.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Microstructure and Fracture Morphology in the Welding Zone of T91 Heat-resisting Steel Used in Power Station

参考文献