一种含Re叶片钢的热处理工艺和组织性能研究  

Study on heat treatment process,microstructure and properties for Re-containing steel for blade

作　　者：彭建强[1,2] 闫红博[3] 孙福民[2] 宗影影[1] 单德彬[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001 [2]哈尔滨汽轮机厂有限责任公司,哈尔滨150046 [3]黑龙江科技大学管理学院,哈尔滨150022

出　　处：《材料科学与工艺》2013年第4期44-49,共6页Materials Science and Technology

摘　　要：为了掌握含Re的高温叶片用钢11crloc02W2MoReVNbNB的最佳热处理工艺和组织性能，对钢进行了热处理工艺试验和组织性能分析。采用Gleeble3800型热／力模拟试验机测定了钢的相变点，采用IN-STRON-5582型电子拉力试验机、HVS-1000型维氏硬度计测定了钢的力学性能，采用Olympus—PMG3型光学显微镜、SUPRA55型扫描电镜、FEITecnaiG2F30型透射电镜分析了钢的组织性能。实验结果表明：钢在1100～1140oC内淬火、在660～700℃内回火时，淬火温度和回火温度对材料性能基本没有影响；与其他高温用12％Cr钢相比，11Cr10C02W2MOReVNbNB钢具有良好的韧性，室温V型冲击性能高达40J以上；钢的组织为回火索氏体，组织均匀、晶粒细小。钢的最佳热处理工艺为（1120±10）℃油冷＋（690±10）℃空冷，钢的主要强化相为M23C6，Re主要存在于基体中，起固溶强化作用。To grasp the optimum heat treatment process and structure properties of a Re-containing steel llCr10Co2W2MoReVNbNB used for ultra-super critical steam turbine blades at elevated temperature, heat treatment process tests and structure analysis are done for the steel. The critical points of the steel is determined using Gleeble3800 thermal-mechanical simulation testing system, and mechanical properties of the steel is determined using INSTRON -5582 electronic tensile testing system and HVS -1030 Vickers hardness tester, and structure properties are analyzed using Olympus - PMG3 optical microscopy, SUPRA55 scanning electronic microscopy, and FEI Tecnai G2 F30 transmission electronic microscopy. The test results show that the quenching and tempering temperature almost have no influence on the properties of the steel within the quenching temperature range of 1 100 - 1 140 ℃, and tempering tem- perature range of 660 - 700 ℃. Compared with the other steels used at elevated temperature, the steel llCrl0Co2W2MoReVNbNB possesses very good toughness, and its impact energy using V notch specimen is over 40 J at room temperature. The structure of the steel is tempered sorbide, and is uniform and of fine grains. The optimum heat treatment process is （1 120±10） ℃ oil quenching and （690 ±10）℃ air cooling, the main strengthening phase is M23C6, and the Re primarily exists in the matrix of the steel with the function of solution strengthening.

关 键 词：含Re叶片钢 汽轮机 热处理工艺 高温 组织 

分 类 号：TG306[金属学及工艺—金属压力加工]