金属学报  1985, Vol. 21 Issue (2): 53-142

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碳在GH99镍基高温合金中的行为及其对持久性能的影响

杨枬森;魏育环;于万众;董殿生

冶金工业部钢铁研究总院;冶金工业部钢铁研究总院;抚顺钢厂;抚顺钢厂

THE BEHAVIOUR OF CARBON IN A Ni-BASE SUPERALLOY GH99 AND ITS INFLUENCE ON STRESS-RUPTURE PROPERTIES

YANG Nansen;WEI Yuhuan Central Iron and Steel Research Institute;Ministry of Metallugical Industry;Beijing;YU Wanzhong;DONG Diansheng Fushun Steel Works

杨枬森;魏育环;于万众;董殿生. 碳在GH99镍基高温合金中的行为及其对持久性能的影响[J]. 金属学报, 1985, 21(2): 53-142.
, , , . THE BEHAVIOUR OF CARBON IN A Ni-BASE SUPERALLOY GH99 AND ITS INFLUENCE ON STRESS-RUPTURE PROPERTIES[J]. Acta Metall Sin, 1985, 21(2): 53-142.

摘要 参考文献 相关文章 Metrics 全文: PDF(2355 KB)   摘要: 在GH_99镍基合金中,无论加入多少碳,固溶在基体中碳的数量均相等(约为0.019wt-%),其余的碳则形成一次碳化物.合金在持久试验过程中,沿着与外力垂直的一次碳化物相界面产生裂口.出现这种裂口的一次碳化物的临界直径为0.80±0.05μm.合金中碳含量愈高,等于和大于这个临界尺寸的一次碳化物的数量就愈多,持久寿命降低的程度也就愈严重.合金的碳含量不超过0.05wt-%时,可显著地减少达到临界尺寸的一次碳化物数量.此外,与外力平行的晶界(纵向晶界)上的M_23C_6碳化物,朝着与外力垂直的晶界(横向晶界)上迁移,致使横向晶界上的M_23C_6数量增多且趋向连成一片.这必然弱化了晶界,损害持久性能. Abstract：The carbon,whether more or less,held in solution in matrix of the Ni-basesuperalloy GH99 is almost equal to about 0.019.wt-% and an excess is formedas primary carbide.The cracks in the specimen is initiated along the primary car-bide-matrix interfaces perpendicular to the direction of stress applied during thestress rupture testing.A critical size of the primary carbide for crack initiationis found to be 0.80±0.05 μm.The more the carbon contained in the alloy,themore the primary carbide no less the critical size is,and the more severely itsstress rupture life lowers.However,the amount of primary carbide up to thiscritical size may be remarkably reduced by limiting the carbon addition below0.05 wt-%.It was also resulted that the carbide,M_(23)C_6,along the longitudinalgrain boundaries parallel to the stress applied migrate toward the transverse grainboundaries normal to the stress applied,and the M_(23)C_6 along transverse grainboundaries may be coagulated and linked together.Thus,it would weaken the grainboundary strength and injure the stress rupture property of the alloy.The rate ofits coagulation seems to related to the carbon contained in the alloy,the morethe carbon content,the faster the rate is. 收稿日期: 1985-02-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 杨枬森 魏育环 于万众 董殿生 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1985/V21/I2/53 1 Holt,R.T.;Wallace,W.,Int.Met.Rev.,21(1976) ,1． 2 Kihara,S.;Newkirk,J.B.;Ohtomo,A.;Saiga,Y.,Metall.Trans.,11A(1980) ,1019． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed