中南大学学报（自然科学版）2017，Vol.48Issue(4)：903-909,7.DOI:10.11817/j.issn.1672-7207.2017.04.008
表面喷丸工艺对Super304H奥氏体耐热钢组织与性能的影响
Effect of surface shot peening on microstructure and properties of Super304H austenitic heat-resistant steels
摘要
Abstract
Severe plastic deformation layer was synthesized on the surface of Super304H stainless steel by surface shot peening. The microstructures and properties of plastic deformation layer were characterized by using scanning electron microscopy (SEM), metallurgical microscope, X-ray diffraction (XRD) and microhardness tester. The grain refining behavior and microhardness distribution were analyzed and discussed. The results show that the grain of surface layer of Super304H stainless steel is refined with high density of dislocations or stacking faults by plastic deformation after shot peening and at the same time, strain induced martensite phase transition is produced. With the increasing of shot peening time, the grain size decreases and the volume fractions of strain induced martensite increases. Surface hardness is improved significantly and is more than twice the untreated specimen.关键词
Super304H/表面喷丸处理/剧烈塑性变形层/硬度Key words
Super304H/surface shot peening/severe plastic deformation layer/hardness分类
矿业与冶金引用本文复制引用
王锐坤,郑志军,高岩..表面喷丸工艺对Super304H奥氏体耐热钢组织与性能的影响[J].中南大学学报（自然科学版）,2017,48(4):903-909,7.基金项目
国家自然科学基金资助项目(51471072)(Project(51471072) supported by the National Natural Science Foundation of China) （51471072）
