摘要
研究了不同热处理工艺对TC6合金显微组织及力学性能的影响。结果显示:增加冷速,组织中初生α相体积百分数、尺寸及片状次生α相厚度均减小,强度增大;油冷、水冷试样的塑性均不及空冷试样的塑性;提高时效温度,初生α相有所长大,次生α相片域减少,厚度增大,强度降低,塑性增加;延长时效保温时间,次生α相厚度有所增大,呈短片状甚至球状,但强度及塑性变化不大;三重热处理后片状次生α相厚度较单级固溶有所增大,试样伸长率提高,但强度下降达100MPa。
The TC6 alloy microstructure and tensile properties were investigated by different heat treatments.The results reveal that with the cooling rate increasing,the content of primary α phase,size and thickness of secondary α-phase sheets decrease,the intensity increases,while the plasticity of air cooling is better than that of oil and water cooling.Aging temperature increase makes the primary α phase grow up,and the secondary α phase field reduces,while the thickness increases,meanwhile intensity decreases and plasticity increases.Aging time increase makes the thickness of the secondary α phase larger and even globalization,but there is little change in strength and plasticity.After triple heat treatment,the thickness of the secondary α-phase sheets are larger than that of single-stage solid solution,and the samples＇ elongation is improved,while intensity is decreased by 100 MPa.
出处
《锻压技术》
CAS
CSCD
北大核心
2011年第6期125-128,共4页
Forging & Stamping Technology
关键词
钛合金
TC6
热处理
显微组织
拉伸性能
titanium alloy
TC6
heat treatment
microstructure
tensile property
