长期时效对高钨镍基高温合金碳化物演变的影响  

Effect of Long-term Thermal Exposure on Carbides Evolution in High Tungsten Ni-based Superalloy

作　　者：穆岩 王树森 仉凤江 王振江[2] 荀淑玲 陈茂凯 侯桂臣[2] Mu Yan;Wang Shusen;Zhang Fengjiang;Wang Zhenjiang;Xun Shuling;Chen Maokai;Hou Guichen(Anshan Military Representative Office of Shenyang Military Representative Bureau,Naval Equipment Department of the Chinese People’s Liberation Army;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences)

机构地区：[1]中国人民解放军海军装备部驻沈阳地区军事代表局驻鞍山地区军事代表室,辽宁鞍山114000 [2]中国科学院金属研究所师昌绪先进材料创新中心,沈阳110000

出　　处：《特种铸造及有色合金》2021年第9期1148-1152,共5页Special Casting & Nonferrous Alloys

基　　金：辽宁省自然科学基金资助项目(2019-MS-336)。

摘　　要：采用SEM、TEM和EPMA等分析方法对高钨镍基高温合金在1000℃长期时效期间的碳化物演变行为进行了研究。结果表明,随着长期时效进行,合金中初生的MC型碳化物可分解为M_(6)C型碳化物,且数量随时效时间延长而增加。当时效时间为500 h时,颗粒状M_(6)C型碳化物转变为块状,并在时效1000 h后逐渐转变为短棒状。时效1500 h后,合金中的M_(6)C型碳化物主要呈针状。The carbide evolution behavior of a high tungsten nickel-based superalloy during long-term aging at 1000℃was investigated by several analysis methods such as SEM,TEM and EPMA.The results indicate that primary MC carbides of the alloy are decomposed into M_(6)C carbides,of which the amount is increased as the prolongation of thermal exposure time.When exposed for 500 h,the morphology of M_(6)C carbides is converted from granular to blocky,and gradually transformed into rod-like after thermal exposure for 1000 h.The morphology of M_(6)C carbides of the alloy is dominated by the needle-like after thermal exposure for 1500 h.

关 键 词：长期时效 高钨镍基高温合金 碳化物演变 

分 类 号：TG132.3[一般工业技术—材料科学与工程] TG156[金属学及工艺—合金]