中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
2期
339-345
,共7页
单晶高温合金%定向凝固%碳含量%碳化物形貌
單晶高溫閤金%定嚮凝固%碳含量%碳化物形貌
단정고온합금%정향응고%탄함량%탄화물형모
single crystal superalloy%directional solidification%carbon levels%carbide morphologies
在抽拉速率为50μm/s的条件下制备5种不同含碳量的单晶高温合金，研究碳对单晶高温合金中碳化物形貌的影响。研究发现，铸态组织中存在4种形貌的MC型碳化物，呈针状、球状、块状以及中文汉字状。随着碳含量的增加，碳化物的体积分数增大而共晶组织的体积显著减少。同时，碳化物的尺寸随着碳含量的增加亦呈增大趋势。
在抽拉速率為50μm/s的條件下製備5種不同含碳量的單晶高溫閤金，研究碳對單晶高溫閤金中碳化物形貌的影響。研究髮現，鑄態組織中存在4種形貌的MC型碳化物，呈針狀、毬狀、塊狀以及中文漢字狀。隨著碳含量的增加，碳化物的體積分數增大而共晶組織的體積顯著減少。同時，碳化物的呎吋隨著碳含量的增加亦呈增大趨勢。
재추랍속솔위50μm/s적조건하제비5충불동함탄량적단정고온합금，연구탄대단정고온합금중탄화물형모적영향。연구발현，주태조직중존재4충형모적MC형탄화물，정침상、구상、괴상이급중문한자상。수착탄함량적증가，탄화물적체적분수증대이공정조직적체적현저감소。동시，탄화물적척촌수착탄함량적증가역정증대추세。
Single crystal superalloys of AM3 with different carbon levels were prepared at withdraw rate of 50μm/s. The effect of carbon addition on the carbide morphology was investigated. It was found that there were four types of MC-type carbides, acicular, nodular, blocky, and Chinese script-type in the crystals. With an increase in carbon level, the volume fraction of carbide increased significantly while the volume fraction of eutectic decreased significantly. Furthermore, the size of carbide in high level carbon alloy became much larger.
