水磨泥合金粉的凝胶注模成形工艺研究
Study on gelcasting process of alloy powder made of grinding mud
车晓舟1
作者信息
- 1. 华南理工大学阳江研究院,广 东阳江 529599
- 折叠
摘要
将刀具生产过程中产生的水磨泥钢粉分离、净化,通过添加适量合金元素配成水磨泥合金粉.采用甲基丙烯酸羟乙酯作单体、三缩四乙二醇双丙稀酸酯作交联剂,用凝胶注模成形方法将水磨泥合金粉成形,经脱模、干燥和1 400 ℃、2h烧结后得到烧结坯,烧结坯组织由珠光体、碳化物和微孔洞组成.烧结坯经1 050 ℃淬火、180 ℃回火热处理,硬度为50HRC.经浓度5％氯化钠水溶液3 h盐雾测试,热处理后的烧结坯的腐蚀程度远低于未热处理的烧结坯,表明水磨泥合金粉烧结坯经淬火、低温回火后具有良好的耐蚀性能.
Abstract
The steel powder was separated from grinding mud produced in Knife and scissors industry.A new al-loy powder was prepared by adding appropriate amount of elements to the purified grinding mud steel powder.Gel-casting process using the hydroxyethyl methacrylate as organic monomer and the tetraethylene glycol dipropylen-ate as crosslinker was investigate respectively.Sintered body with good surface condition was obtained after de-moulding,drying and sintering the green body at 1 400 ℃ for 2 h.The microstructure of the sintered body is com-posed of pearlite,carbide and micropore.The as-sintered specimen was then quenched at 1 050 ℃ and tempered at 180 ℃,respectively.Hardness of the sample after heatreatment is 50HRC.After 3 h salt spray test with 5％sodi-um chloride aqueous solution,the corrosion degree of the as-heattreated sintered body is much lower than that of sintered bodys without heat treatment.It shows that sintered alloys made of grinding mud alloy have good corrosion resistance after quenching and low temperature tempering.
关键词
凝胶注模成形/水磨泥/不锈钢/烧结/耐蚀性能Key words
gelcasting/grinding mud/stainless steel/sintering/corrosion resistance引用本文复制引用
基金项目
2020年广东省科技专项资助项目(SDZX2020013)
出版年
2024
NETL
NSTL
万方数据