摘要
研究了固溶处理过程中不同冷却速率对IN738LC合金组织及性能的影响。研究结果表明,γ＇相尺寸随固溶处理后的冷却速率提高而减小,γ＇相形貌也随着冷却速率的提高而更加规则,从而使拉伸强度和持久性能随冷却速率的提高而增加,而伸长率呈降低趋势。从1120℃以30-40℃/min的冷却速率冷却到850℃,再空冷到室温的热处理制度,能够使IN738LC合金具有最佳强度和塑性匹配。
Effect of cooling rates during solution treatment on microstructure and mechanical properties of IN738 LC superalloy were investigated.The results show that the size of γ＇ phase decreased with cooling rates during the solution treatment.The morphologies of γ＇phase become more regular with the increase of cooling rates.The tensile strength and the endurance performance increase with cooling rates,while the tensile elongation decrease.When rates at 30 - 40 ℃ / min from 1120 ℃ to 850 ℃ during solution treatment,the sample can obtain preferable mechanical properties.
出处
《金属热处理》
CAS
CSCD
北大核心
2015年第11期153-156,共4页
Heat Treatment of Metals
关键词
γ'相
固溶处理
冷却速率
显微组织
持久性能
抗拉强度
γ＇ phase
solution treatment
cooling rate
microstructure
endurance property
tensile strength
