摘要
采用冷气动力超音速微粒高能轰击技术对16MnR低合金钢表面进行处理,利用扫描电镜、透射电镜和X衍射方法对基体表面的微观形貌和结构进行分析。试验结果表明:试样经过超音速微粒轰击处理后可以使表层晶粒细化至纳米量级,平均晶粒的尺寸为14.2nm;处理后表层主要产生压应力;处理后表层的显微硬度增加。
A nanocrystalline surface layer was fabricated on the 16MnB low alloy steel by using the supersonic perticles bombarding（SSPB） technology. Mioromorhology and structure were analyzed by means of SEM, TEM and XBD. The experimental results show that the initial coarse- grained structure on the top surface is refined into ultrafine grain after the SSPB treatment for a short period time. The mean grain on the surface layer is about 14.2 nm. The surface layer presents compression stress and the microhardness of the surface layer increases after the treatment.
出处
《焊接》
北大核心
2006年第2期43-46,共4页
Welding & Joining
关键词
超音速微粒轰击
表面纳米化
应力状态
supersonic fine particles bombarding（SSPB）,surface nanocrystallization（SBC）,stress state
