Reheat Embrittlement Behavior of CGHAZ in Welded Joint of 12Cr1MoV Steel

NIU Rui-feng; SHANG Liang; ZHU Yi-qiao; CAO Yi-shan; TAN Yong-ning

doi:10.11973/jxgccl201506016

Materials and Mechanical Engineering > 2015 > 39(6): 79-83. > DOI: 10.11973/jxgccl201506016

NIU Rui-feng, SHANG Liang, ZHU Yi-qiao, CAO Yi-shan, TAN Yong-ning. Reheat Embrittlement Behavior of CGHAZ in Welded Joint of 12Cr1MoV Steel[J]. Materials and Mechanical Engineering, 2015, 39(6): 79-83. DOI: 10.11973/jxgccl201506016

Citation:

PDF (4052 KB)

Reheat Embrittlement Behavior of CGHAZ in Welded Joint of 12Cr1MoV Steel

More Information

Received Date: March 19, 2015

Graphical Abstract

Abstract

Abstract

The reheat embrittlement behavior of the coarse grain heat affected zone (CGHAZ) in welded joint of 12Cr1MoVG steel was investigated by means of thermal simulation technique. The results show that the reheat temperature had remarkable effects on the microstructure and properties of CGHAZ. With the increase of reheat temperature, the martensite and bainite in the microstructure decomposed while the ferrite merged, the precipitated carbides increased, gathered and grew up, and the impact energy first decreased and then increased, but the hardness displayed an opposite trend. At the reheat temperature of 630 ℃, the impact energy of CGHAZ had the lowest value but the microhardness hit the largest value, and the reheat embrittlement occured. The reheat embrittlement can be ascribed to the orientational precipitation of intragranular carbides and the occurrence of large granular carbides in the grain boundaries of CGHAZ.
- 12Cr1MoVG steel,
- thermal simulation technique,
- CGHAZ,
- reheat embitterment

FullText(HTML)

References (17)

References

[1]	于启湛, 史春元. 耐热金属的焊接[M]. 北京: 机械工业出版社, 2009: 112-115.
[2]	陈忠兵, 赵彦芬, 赵建仓, 等. 厚壁12Cr1MoVG钢焊接接头裂纹分析及其控制[J]. 中国电机工程学报, 2012, 32(35): 137-143.
[3]	姚钦. HQ-80钢再热裂纹机理[J]. 焊接学报, 2004, 25(6): 77-81.
[4]	任晓, 王传标. 压力容器用低合金钢焊接接头再热裂纹的研究进展[J]. 机械工程材料, 2012, 36(5): 5-8.
[5]	代小号, 冯砚厅. 某电厂再热器出口联箱管接头连续开裂原因分析[J]. 热加工工艺, 2012, 41(12): 222-223.
[6]	姜运建, 冯砚厅, 郑相锋, 等. 300MW电站锅炉高温联箱裂纹原因分析[J]. 热加工工艺, 2012, 41(1): 168-169.
[7]	李立英, 王勇, 韩涛, 等. 焊后热处理对ASTM 4130钢焊接粗晶区韧性的影响[J]. 压力容器, 2011, 28(2): 16-21.
[8]	周志良, 刘书华. 焊后热处理对DQTHT80钢热影响区断裂韧性的影响[J]. 焊接学报, 1998, 19(1): 37-40.
[9]	白世武, 李午申, 邸新杰, 等. 07MnNiCrMoVDR钢焊接粗晶热影响区的韧化机理[J]. 焊接学报, 2008, 29(3): 25-28.
[10]	THOMSON R C, BHADESHIA H K D H. Carbide precipitation in 12Cr1MoV power plant steel[J]. Metallurgical and Materials Transactions: A, 1992, 23(4): 1171-1179.
[11]	AUZOUX Q, ALLAIS L, CAES C, et al. Effect of pre-strain on creep of three AISI 316 austenitic stainless steels in relation to reheat cracking of weld-affected zones[J]. Journal of Nuclear Materials, 2010, 400(2): 127-137.
[12]	杨峰, 于庆波. 12CrlMoV钢高温运行过程中组织和性能的研究[J]. 热加工工艺, 2009, 38(20): 28-30.
[13]	杜则裕. 焊接科学基础[M]. 北京: 机械工业出版社, 2012: 267-280.
[14]	MOON H K, LEE K B, KWON H. Influences of Co addition and austenitizing temperature on secondary hardening and impact fracture behavior in P/M high speed steels of W-Mo-Cr-V(-Co) system[J]. Materials Science and Engineering: A, 2008, 474(1/2): 328-334.
[15]	MENG Yi, SUGIYAMA S, YANAGIMOTO J. Effects of heat treatment on microstructure and mechanical properties of Cr-V-Mo steel processed by recrystallization and partial melting method[J]. Journal of Materials Processing Technology, 2014, 214(1): 87-96.
[16]	杨钢, 刘新权, 杨沐鑫, 等, 1Cr12Ni3Mo2VN( M152) 耐热钢的脆化机制[J]. 特钢技术, 2009, 15(4): 14-24.
[17]	胥永刚, 李宁, 蔡光军, 等. 铬、铌和钒对9Cr-1Mo钢焊缝回火组织性能的影响[J]. 焊接学报, 2002, 23(5): 49-52.

Cited By

Get Citation

PDF

XML

Article views PDF downloads

Turn off MathJax

Article Contents

Abstract

References

Reheat Embrittlement Behavior of CGHAZ in Welded Joint of 12Cr1MoV Steel

Abstract

References

Catalog

Export File

Citation

Format

Content