热等静压温度对雾化合金粉制备的9Cr-ODS钢组织和性能的影响  

The Effects of Hot Isostatic Pressing Temperature on Microstructures and Properties of 9Cr-ODS Steels Produced by Atomization Alloy Powder

作　　者：谢锐 吕铮 徐长伟[1] 刘春明 XIE Rui;LYU Zheng;XU Changwei;LIU Chunming(School of Material Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),School of Material Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]沈阳建筑大学材料科学与工程学院,沈阳110168 [2]东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,沈阳110819

出　　处：《材料导报》2021年第8期169-178,共10页Materials Reports

基　　金：国家自然科学基金/青年科学基金(51601031);辽宁省自然科学基金面上项目(2017540306)。

摘　　要：本实验以雾化合金粉制备的9Cr-ODS钢为研究对象,首先利用激光粒度仪、XRD、SEM、EDS等实验手段研究氧化物弥散强化钢雾化合金粉的球磨工艺,再利用EBSD、HAADF、SAXS等实验方法研究热等静压温度对雾化合金粉制备的9Cr-ODS钢的微观结构和力学性能的影响。实验结果表明雾化合金粉经过8 h球磨可以符合制备ODS钢的各项要求。900℃、1100℃、1200℃热等静压成型的9Cr-ODS钢的晶粒尺寸分别为0.36μm、0.94μm和1.66μm。小角度X射线散射结果表明,在900℃、1100℃和1200℃HIP成型的样品中,富Y、Ti、O析出相的分布密度最高值分别为3.94×10^(22)/m^(3)、1.03×10^(22)/m^(3)和8.66×1021/m^(3)。雾化合金粉制备的9Cr-ODS钢中的富Al、Ti、Cr氧化物相的分布密度随着热等静压温度的升高而降低。在雾化合金粉制备的ODS钢样品中均发现了富Y、Ti、O纳米析出相,且成型温度越高,富Y、Ti、O纳米析出相的分布密度越低。900℃热等静压成型样品的力学性能较为优异,成型温度升高,样品的力学性能逐渐下降。In this paper 9 Cr-ODS steels produced by atomization alloy powders were studied.The milling technology of atomization alloy powders were studied firstly by laser particle size analyzer,XRD,SEM,EDS and so on.The EBSD,TEM,HAADF and SAXS were applied to study the effect of hot isostatic pressing temperatures on the microstructure and mechanical properties of 9 Cr-ODS steels.The experiment data show that the alloy powder can meet the requirements of preparing ODS steels after 8 h ball milling.The grain sizes of atomization alloy powders 9 Cr-ODS steels hot isostatic pressing at 900℃,1100℃and 1200℃are 0.36μm,0.94μm and 1.66μm,respectively.The small angle X-ray scattering results show that the distribution densities of Y,Ti,O enrich nano-precipitates in the 9 Cr-ODS steels produced by atomization alloy powders are 3.94×1022/m^(3),1.03×10^(22)/m^(3) and 8.66×10^(21)/m^(3).The distribution densities of Al,Ti,Cr oxides decrease as hot isostatic pressing temperatures rise.The Y,Ti,O enrich nano-precipitates are found in the 9 Cr-ODS steels produced by atomization alloy powders.As the hot isostatic pressing temperatures rise,the distribution densities Y,Ti,O enrich nano-precipitates decreased.The sample of 9 Cr-ODS steel hot isostatic pressing at 900℃display excellent mechanical properties.The mechanical properties decrease as hot isostatic pressing temperature rise.

关 键 词：雾化合金粉 氧化物弥散强化钢 球磨 热等静压温度 

分 类 号：TB31[一般工业技术—材料科学与工程]