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铅基快堆用CLRASS奥氏体不锈钢热变形组织的均匀性
Alternative TitleUniformity of hot deformed microstructure of CLRASS austenitic stainless steel for lead-cooled fast reactor
易昊钰1; 梁田2; 陆成旭2; 王旻2; 马颖澈2
2020
Source Publication材料热处理学报
ISSN1009-6264
Volume41.0Issue:005Pages:95-101
Abstract采用光学显微镜、扫描电镜和透射电镜等研究了热变形方式、合金成分等对CLRASS不锈钢锻造变形组织均匀性的影响。结果表明:条带组织主要由带状分布的亚微米尺寸二次TiC颗粒和链状分布的一次TiC组成,其形成主要与Ti元素的易凝固偏析特性、铸锭一次TiC析出受到抑制和锻锭热变形过程中二次TiC的不均匀析出有关。锻前均匀化热处理和墩粗拔长处理能够通过施加高温和引入位错减轻合金铸锭中的Ti元素偏析,调整二次TiC析出均匀性,从而抑制条带组织形成。此外,减小铸锭高径比和降低合金Ti/C比也能通过提高合金变形效率和减少TiC析出从而降低条带组织的形成倾向。
Other AbstractThe effects of thermal deformation and alloy composition on microstructure uniformity of forged CLRASS stainless steel were studied by means of optical microscope,scanning electron microscopy and transmission electron microscopy.The results show that the band-like microstructure is mainly composed of sub-micron secondary TiC particles with banding distribution and primary TiC with chainlike distribution,and the main reasons for the formation of band-like structure are the segregation feature of Ti element,the suppression of TiC precipitation in the cast ingot,and the inhomogeneous precipitation behavior of secondary TiC in the forged ingot.The homogenization heat treatment before forging and the drawing-down and drawing-out forging processes can reduce the segregation of Ti elements in the alloy ingots,adjust the precipitation uniformity of secondary TiC,and thus inhibit the formation of band-like structure.In addition,reducing the ratio of ingot height to diameter and the Ti/C ratio of the alloy can also reduce the formation tendency of band-like microstructure.
Keyword奥氏体不锈钢 热变形 Ti元素偏析 TiC碳化物 二次析出
Indexed ByCSCD
Language中文
CSCD IDCSCD:6719946
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/152185
Collection中国科学院金属研究所
Affiliation1.中广核研究院有限公司
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
易昊钰,梁田,陆成旭,等. 铅基快堆用CLRASS奥氏体不锈钢热变形组织的均匀性[J]. 材料热处理学报,2020,41.0(005):95-101.
APA 易昊钰,梁田,陆成旭,王旻,&马颖澈.(2020).铅基快堆用CLRASS奥氏体不锈钢热变形组织的均匀性.材料热处理学报,41.0(005),95-101.
MLA 易昊钰,et al."铅基快堆用CLRASS奥氏体不锈钢热变形组织的均匀性".材料热处理学报 41.0.005(2020):95-101.
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