卞宏友,邸腾达,王世杰,曲伸,王伟,杨光.热处理对激光沉积DZ125合金组织与摩擦磨损性能的影响[J].稀有金属材料与工程,2020,49(8):2839~2844.[Bian Hongyou,Di Tengda,Wang Shijie,Qu Shen,Wang Wei,Yang Guang.Effect of Heat Treatment on Microstructure and Friction and Wear Properties of Laser Deposition DZ125 Alloy[J].Rare Metal Materials and Engineering,2020,49(8):2839~2844.]
热处理对激光沉积DZ125合金组织与摩擦磨损性能的影响
投稿时间:2019-08-05  修订日期:2019-08-13
中文关键词:  DZ125高温合金  热处理  激光沉积  显微组织  摩擦磨损
基金项目:辽宁省自然科学基金(20170540690)国家重点研发计划资助(2017YFB1104002)
中文摘要:
      研究了不同热处理制度对激光沉积DZ125高温合金显微组织、硬度及摩擦磨损性能的影响规律。结果表明:沉积区枝晶形貌为外沿生长的柱状枝晶,平均一次枝晶间距约为10.8μm,经单级时效(870 ℃/20h,AC)和双级时效(1100 ℃/4h,AC to 870 ℃/20h,AC)热处理后,试样的枝晶形貌与沉积态差别不大,γ"相均发生粗化现象,且双级时效热处理后的γ"相粗化程度更高、尺寸分布更为均匀;双级时效热处理制度下,不同低温时效温度γ"相的平均尺寸和含量不同,其中 1100 ℃/4h,AC to 870 ℃/20h,AC制度下,γ"相的平均尺寸和含量最大;经单级时效和双级时效热处理后,碳化物中Ti元素含量均呈下降趋势;双级时效热处理后,析出两种形貌不规则的MC碳化物,分别为富含Cr、Co元素的M23C6型碳化物和富含W、Mo元素的M6C型碳化物;单级时效和双级时效热处理试样的磨损机理均为磨粒磨损,双级时效热处理试样的显微硬度及耐磨性能均优于单级时效。
Effect of Heat Treatment on Microstructure and Friction and Wear Properties of Laser Deposition DZ125 Alloy
英文关键词:DZ125 superalloy  heat treatment  laser deposition  microstructure  friction and wear
英文摘要:
      The effects of different heat treatment regimes on the microstructure, hardness and friction and wear properties of laser deposited DZ125 superalloys were investigated. The results show that the dendritic morphology of the depositional area is columnar dendrite growing on the outer edge, and the average primary dendrite spacing is about 7.8μm. After single-stage aging (870 °C/20h, AC) and two-stage aging (1100 °C/4h, AC to 870 °C/20h, AC), the dendritic morphology and sedimentary state of the sample are not much different, γ" The coarsening phenomenon occurs in each phase, and the γ" phase coarsening degree and the size distribution are more uniform after the two-stage aging heat treatment; Under the two-stage aging heat treatment system, the average size and content of different aging temperature γ" phases are different, including 1100 °C/4h, AC to 870 °C/20h, and the average size and content of γ" phase are the largest under AC system; After single-stage aging and two-stage aging heat treatment, the content of Ti in the carbides showed a downward trend; After two-stage aging heat treatment, two kinds of irregularly shaped MC carbides are precipitated, which are M23C6 type carbides rich in Cr and Co elements and M6C type carbides rich in W and Mo elements; The wear mechanism of the unipolar aging and the two-stage aging heat treatment specimens is abrasive wear. The microhardness and wear resistance of the two-stage aging heat treatment samples are better than the single-stage aging.
作者单位E-mail
卞宏友 沈阳航空航天大学航空制造工艺数字化国防重点学科实验室 bianhongyou@sau.edu.cn 
邸腾达 沈阳航空航天大学航空制造工艺数字化国防重点学科实验室  
王世杰 沈阳工业大学机械工程学院  
曲伸 中国航发沈阳黎明航空发动机有限责任公司焊接技术室  
王伟 沈阳航空航天大学航空制造工艺数字化国防重点学科实验室  
杨光 沈阳航空航天大学航空制造工艺数字化国防重点学科实验室  
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