一种风机转子用FV520(B)不锈钢碱性焊条的研制

中国机械工程 ›› 2011, Vol. 22 ›› Issue (22): 2749-2753.

一种风机转子用FV520(B)不锈钢碱性焊条的研制

张敏1;李岩1，2;李继红1;吕金波1

1.西安理工大学,西安,710048

2.西安陕鼓动力股份有限公司，西安，710075

出版日期:2011-11-25 发布日期:2011-12-12
基金资助:
陕西省教育厅自然科学基金资助项目(00K904)；西安市科技计划资助项目(CXY09024)
Shanxi Provincial Natural Science Foundation of Ministry of Education of China（No. 00K904）;
Science and Technology program of Xi’an ( No. CXY09024)

Development of One Kind of FV520(B) Stainless Steel Matching with Alkalinity Welding Electrode Used on Fan Impeller 

Zhang Min1;Li Yan1,2;Li Jihong1;Lü Jinbo1

1.Xi'an University of Technology,Xi'an,710048

2.Xi'an Shaangu Power Co., Ltd.,Xi'an,710075

Online:2011-11-25 Published:2011-12-12
Supported by:

Shanxi Provincial Natural Science Foundation of Ministry of Education of China（No. 00K904）;
Science and Technology program of Xi’an ( No. CXY09024)

摘要/Abstract

摘要：

根据风机叶轮焊接接头强韧性对高性能焊条的要求,结合焊材设计的组织匹配原则,通过金相分析、力学性能测试、断口观察等方法，研制了一种力学性能和工艺性能都较为优异的焊条。结果表明,所研制焊条熔敷金属的合金系为Cr-Ni-Nb-Cu-Ti,其力学性能优于FV520(B)专用焊条;Mo、Nb、Ti、Cr等合金元素的富铬碳化物和合金碳化物Mo2C3、NbCrN、Ti(C,N)提高了熔敷金属的强韧性;焊缝区和HAZ的组织均为回火索氏体(SH)+板条马氏体（M）+残余奥氏体（A′）+二次析出相;1#、2#、4#焊条的断裂机理为准解理断裂，而3#焊条的断裂机理为韧窝加解理的复合型断裂。

关键词:

沉淀硬化, 焊条, 马氏体, 力学性能

Abstract:

According to the mechanical property requirements of fan impeller welded joints to high-performance welding electrode and combination with principles of welding material designed to microstructure matching, a kind of welding electrode with good mechanical and processing properties was developed by using metallurgical analysis, mechanical property testing and fracture observation.The results show that the deposited metal of developed welding electrode with the alloy system Cr-Ni-Nb-Cu-Ti and mechanical properties of welding electrode developed is superior to the special welding electrode of

FV520(B) stainless steel. Mechanical properties of deposited metal were improved by carbides

rich of chromium and alloying.The carbides are Mo2C3,NbCrN and Ti(C,N) which

are composed by alloy element of Mo,Nb,Ti,Cr and so all.The welding zone and HAZ microstructure of FV520(B) stainless steel is composed of tempered sorbite, lath martensite,

residual austenite and quadratic precipitated phase. However, the fracture mechanism of No.1,No.2 and No.4 welding electrode is quasi-cleavage crack and the No.3 is complex fracture consisting of dimple and cleavage fracture. 

Key words: precipitation hardening, welding electrode, martensite, mechanical property

中图分类号:

TG422

张敏1, 李岩1, 2, 李继红1, 吕金波1.

一种风机转子用FV520(B)不锈钢碱性焊条的研制

[J]. 中国机械工程, 2011, 22(22): 2749-2753.

ZHANG Min-1, LI Yan-1, 2, LI Ji-Gong-1, LV Jin-Bei-1.

Development of One Kind of FV520(B) Stainless Steel Matching with Alkalinity Welding Electrode Used on Fan Impeller 

[J]. China Mechanical Engineering, 2011, 22(22): 2749-2753.

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http://www.cmemo.org.cn/CN/Y2011/V22/I22/2749

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