Characterization of Vacuum Heat Treated Stainless Plastic Mold Steels
(0) In this study, plastic mold steels have been vacuum heat treated by different quenching and tempering processes. Two martensitic stainless plastic mold steels, JIS SUS 420J2 and ASSAB STAVAX ESR, were used as the experimental materials. A series of vacuum heat treatment has been conducted at austenitizing temperature ranging from 1000 to 1050℃ and temper temperature ranging from 180 to 600℃ to obtain the tempered martensitic microstructure. The electrochemical tests were carried out in a 3.5wt％ NaCl aerated solution. The results show that the hardness of SUS420J2 and STAVAX ESR were reached to 54.1 and 52.5 HRC by austenitizing at 1020℃ for 25 minutes and then N2 gas quenching. From X-ray diffraction analysis, the phases of the treated specimens were consisted of martensite. The STAVAX ESR specimens show a lower current density than SUS 420J2, according to the STAVAX ESR having the better homogeneity than SUS 420J2 at the same vacuum heat treatment processes. According to polarization data, the corrosion current densities of specimen austenitized at 1050℃ were generally lower than those of the specimen austenitized at 1020 ℃; it is evident that higher austenitizing temperature can promote the redistribution of alloying elements which can improve the corrosion property.
plastic mold steel vacuum heat treatment gas quench polarization test
Chiu Liu-Ho Yeh Shu-Hung Li Chin-Hung Lo Wan-Chung Huang Chien-Lung
Dept.of Materials Engineering,Tatung University,Taipei,Taiwan Metal Industries Research & Development Centre,Kao-Hsiung,Taiwan
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
296-300
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）