The effect of microstructure on hardness and toughness of low carbon welded steel using inert gas welding

被引：52

作者：

Gharibshahiyan, Ehsan ^{[1
]}

Raouf, Abbas Honarbakhsh ^{[2
]}

Parvin, Nader ^{[3
]}

Rahimian, Mehdi ^{[4
]}

机构：

[1] Oghab Afshan Ind & Mfg Co, R&D Dept, Semnan, Iran

[2] Semnan Univ, Fac Engn, Dept Mat, Semnan, Iran

[3] AUT, Fac Min & Mat Engn, Tehran, Iran

[4] Islamic Azad Univ, Semnan Branch, Fac Engn, Semnan, Iran

来源：

MATERIALS & DESIGN | 2011年 / 32卷 / 04期

关键词：

Welding; Microstructure; Brittle fracture; PARAMETERS;

D O I：

10.1016/j.matdes.2010.11.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The heat affected zone (HAZ), has a great influence on the properties of welded joints since it can alter the microstructure and residual stresses. In this paper, the effect of welding parameters and heat input on the HAZ and grain growth has been investigated. The role of grain size on hardness and toughness of low carbon steel has also been studied. It was observed that, at high heat input, coarse grains appear in the HAZ which results in lower hardness values in this zone. For example raising the voltage from 20 to 30 V decreased the grain size number from 12.4 to 9.8 and hardness decreased from 160 to 148 HBN. High heat input and low cooling rates produced fine austenite grains, resulting in the formation of fine grained polygonal ferrites at ambient temperature. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2042 / 2048

页数：7

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