CAUSE ANALYSIS OF WELDED JOINT CRACKING FOR G102 STEEL HIGHTEMPERATURE TUBE

YU Song; YU Yong

doi:10.19666/j.rlfd.2005.02.018

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CAUSE ANALYSIS OF WELDED JOINT CRACKING FOR G102 STEEL HIGHTEMPERATURE TUBE

更新时间：2025-09-28

- CAUSE ANALYSIS OF WELDED JOINT CRACKING FOR G102 STEEL HIGHTEMPERATURE TUBE
- Thermal Power Generation Issue 2, Pages: 54-56(2005)
- 作者机构：
  
  1. 军粮城发电厂
  2. 军粮城发电厂,天津,300300
  3. ,天津,300300
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2005.02.018
  CLC： TG407
- Published：2005
- 稿件说明：
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YU Song, YU Yong. CAUSE ANALYSIS OF WELDED JOINT CRACKING FOR G102 STEEL HIGHTEMPERATURE TUBE[J]. Thermal power generation, 2005, (2): 54-56.
DOI：

YU Song, YU Yong. CAUSE ANALYSIS OF WELDED JOINT CRACKING FOR G102 STEEL HIGHTEMPERATURE TUBE[J]. Thermal power generation, 2005, (2): 54-56. DOI： 10.19666/j.rlfd.2005.02.018.

摘要

对12Cr2MoWVTiB(G102)焊接接头断裂部位进行力学性能、扩散氢浓度、金相及扫描电镜等分析

结果表明:在焊缝的热影响区存在淬硬的马氏体组织

HV值达 391~450

超过了 G102 基体组织硬度;焊后氢浓度超标

极易产生冷裂纹

从而造成焊接接头断裂失效。

Abstract

Analysis

such as mechanical property

diffuss hydrogen concentration

metallurgical

and scanning electronic microscope etc.

of cracked part for welded joint of 12Cr2MoWVBiT(G102) steel tube on hightemperature superheater has been carried out. Results shows that the quench hardening martensitic organism exists in heat effect zone of the welded joint

HV value reaching 391~450

being higher than hardness of G102 steel's basic structure

the hydogen concentration after welding exceeding standard

being easily to produce cold cracks

thereby cracking failure of the welded joint occurred.

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