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	NiCrMoV耐热钢汽轮机转子焊缝韧性薄弱区的成因
	李轶非 ; 蔡志鹏 ; 潘际銮 ; 刘霞 ; 王朋 ; 霍鑫 ; 沈红卫 ; LI Yifei ; CAI Zhipeng ; PAN Jiluan ; LIU Xia ; WANG Peng ; HUO Xin ; SHEN Hongwei
	2016-03-30 ; 2016-03-30
关键词	耐热钢 M-A组元 焊缝韧性 不完全相变区 ultrafiltration nanoparticles in-situ embedment anti-biofouling TG457.11
其他题名	Research on toughness weak points of joints of NiCrMoV refractory steel for manufacturing steam turbine rotor
中文摘要	采用热模拟的方法研究了30Cr2Ni4MoV汽轮机转子用钢多层多道焊焊缝韧性薄弱区的成因.采用光学显微镜、扫描电镜和透射电镜研究了层间局部富碳区域组织对韧性的影响规律.结果表明,焊缝层间局部富碳区域的M-A组元是造成层间韧性薄弱的主要原因之一.M-A组元对韧性的影响与M-A组元的分布、形态、尺寸等因素有关.热模拟二次峰值温度为680℃时,层间回火区M-A组元发生了部分分解;二次峰值温度为820℃时,层间不完全相变区原奥氏体晶界处M-A组元体积增大,晶内M-A组元呈平行的大颗粒链状分布,二次峰值温度为1 050℃时,原奥氏体晶界部分消失,晶内M-A组元部分呈弥散分布.; The toughness weak points of multi-layer and multi-pass weld of 30Cr2Ni4 MoV refractory steel steam turbine welded rotor were studied by means of simulated heat welded layers with the emphasis on the forming of the toughness weak points and its influence on the toughness. The methods of optical microscope analysis,scanning electron microscopy analysis and transmission electron microscope analysis were utilized. The experimental results show that there are many M-A constituents in the carbon-rich areas of welded layers,which is disadvantageous to the toughness. The influence of the M-A constituents on the weld toughness is closely related to the distribution,pattern and dimension. M-A constituents in the refined zone of welded layers decompose at second peak temperature of 680 ℃,large particle M-A constituents at prior austenite grain boundaries and bulk grain M-A constituents in prior austenite grains are found in the incomplete phase change zone of welded layers at second peak temperature of 820 ℃,and M-A constituents distribute uniformity at 1 050 ℃ with the disappear of prior austenite grain boundaries.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144478]
专题	清华大学
推荐引用方式 GB/T 7714	李轶非,蔡志鹏,潘际銮,等. NiCrMoV耐热钢汽轮机转子焊缝韧性薄弱区的成因[J],2016, 2016.
APA	李轶非.,蔡志鹏.,潘际銮.,刘霞.,王朋.,...&SHEN Hongwei.(2016).NiCrMoV耐热钢汽轮机转子焊缝韧性薄弱区的成因..
MLA	李轶非,et al."NiCrMoV耐热钢汽轮机转子焊缝韧性薄弱区的成因".(2016).

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