碳及铬碳比对铁铬镍高温合金性能的影响  

Effects of Carbon and Cr/C Ratio on the Properties of Fe-Cr-Ni High-temperature Alloys

作　　者：王执福[1] 刘俊诚[1] 公志光[1] 孙本茂 潘正伟 

机构地区：[1]山东工业大学

出　　处：《铸造》1993年第11期5-7,共3页Foundry

摘　　要：研究了２７组铁铬镍合金试样在１２５０℃大气条件下的高温性能。结果表明，当铬碳比为６０－１００，碳为０．２５－０．４０％，随碳含量增加，合金的高温强度明显提高，抗氧化性与工艺性能无不良变化；当碳量大于０．５０％时，则偏聚于晶界上的碳化物过多，且形貌与分布状况恶化，合金的高强度与抗氧化性显著降低。合金含铬量超过３０％，无实际意义。The high-temperature properties of twenty-seven Fe-Cr-Ni high-tempera- ture alloys were tested at 1250℃ and in atmospheric condition. Results showed that, at Cr/C ratio of 60-100 and carbon levels of 0.25-0.40%, the high- temperature strength (σb) of this alloy considerably increased with raising carbon levels, while the oxidation resistance and technological properties had no detectable change. When carbon levels exceeded 0.5%, the high-temperature properties decreased markedly, while chromium at levels above 30% had no sense.

关 键 词：耐热合金 碳 铬碳比 抗氧化性 

分 类 号：TG132.33[一般工业技术—材料科学与工程]