【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%时,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,合金的高温强度与抗氧化性显著降低.合金含铬量超过30%,无实际意义.更多还原

【Abstract】 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.更多还原