Binding between Pack Cementation Siliconized Layer and Substrate of AISI-304 Steel Checked by Notch Breaking Test
Pack cementation siliconizing was conducted on the surface of AISI-304 austenitic stainless steel. A fine and close siliconized layer with the thickness over 50 μm was observed on the steels surface via diffusing at 1050℃ in the mixed siliconizing powder with 70 wt ％ Si content. In order to investigate the binding state between the siliconized layer and the austenite substrate, a pre-notched breaking test was applied. By means of the micro-hardness test, scanning electronic microscope (SEM) and the X-ray energy dispersive spectrum (EDS), the binding mechanism is discussed via the analysis of the relations between the fracture morphology and the microstructure of the siliconized layer. The result of notch breaking test revealed the binding between the siliconized layer and the austenite substrata is firm and strong, which can be attributed to the ductile frontier of the columnar grain microstructure of the siliconized layer, the Si concentration gradient in the layer, the transitional match of micro-hardness along the siliconized layer to the substrate, and finally, the nanometer microstructure at the frontier of the siliconized layer.
Pack cementation siliconizing Austenite stainless steel combination strengthen notch breaking test microstructure fracture analyses
LUO Xin-min WANG Jin-Ian CHEN Kang-min PAN Li
School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
382-386
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）