Mo钢、Nb-Mo钢变形后弛豫及时效过程中的析出行为  

Precipitation Behavior of Mo and Nb-Mo Steels During Relaxation and Ageing After Deformation

作　　者：苑少强[1] 武会宾[2] 梁国俐[1] 王春[1] 

机构地区：[1]唐山学院科研处,河北唐山063000 [2]高效轧制国家工程研究中心,北京100083

出　　处：《金属热处理》2007年第10期29-31,共3页Heat Treatment of Metals

基　　金：国家"863"研究发展计划(2003AA001020);2007年唐山市科学技术研究与发展计划(06110101A-4)

摘　　要：利用热模拟技术、硬度测量及透射电镜分析了Mo钢和Nb-Mo钢在经历热变形弛豫后525℃时效时的硬度变化及析出过程,结果表明,含0.31 wt%Mo的钢在高温变形后的弛豫过程中没有析出,但在随后的时效过程有沉淀析出;而Nb-Mo钢不但发生应变诱导析出,而且在随后的时效仍有沉淀析出,硬度变化有起伏。通过能谱分析发现,析出物为含Nb、Mo的碳氮化合物。The hardness variation and precipitation behavior of the Mo steel and Nb-Mo steel during aging at 525 ℃ after relaxation in hot deformation were studied by using the thermo-simulation test,hardness measurement and TEM. The results show that no precipitation occurs during relaxation after deformation in Mo steel with content of 0.31 wt% Mo,but deposition appears in ageing. While for the Nb-Mo steel, the strain-induced precipitation incurs and deposits appear in ageing, which results in the variation of hardness. The analysis of energy spectrum demonstrates that the precipitates are carbonitrides containing Nb and Mo.

关 键 词：Nb-Mo钢 弛豫 析出 硬度峰 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG142.4[金属学及工艺—金属学]