注射成形0Cr17Mn11Mo3N无镍高氮不锈钢的烧结  

Sintering of nickel-free high nitrogen 0Cr17Mn11Mo3N stainless steel prepared by powder injection molding

作　　者：崔大伟[1] 曲选辉[1] 郭萍[2] 李科[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]潍坊学院机电工程系,潍坊261061

出　　处：《北京科技大学学报》2008年第10期1112-1116,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.50634010);国家高技术研究发展计划资助项目(No.2006AA032502)

摘　　要：采用粉末注射成形技术制备了0Cr17Mn11Mo3N无镍高氮奥氏体不锈钢,研究了各烧结工艺参数(温度、时间、气氛)对其相对密度及氮含量的影响.结果表明:温度是最重要的烧结参数,提高温度可以显著增加烧结体的相对密度,但引起氮含量的下降,在1300℃以上烧结,烧结体相对密度可达99%以上;烧结时间所起作用不明显,烧结2 h足够使粉末致密化过程完成;气氛对0Cr17Mn11Mo3N不锈钢的烧结影响显著,在N2+H2混合气中烧结比在纯N2气中获得更高的相对密度及更低的氮含量.0Cr17Mn11Mo3N不锈钢的最佳烧结条件为:温度1300℃,时间2 h,气氛采用流动的高纯氮气,此时烧结体相对密度达到99.1%,氮质量分数为0.78%.A kind of nickel-free high nitrogen austenitic stainless steel （0Cr17Mn11Mo3N） was prepared by powder injection molding. The effects of sintering parameters such as temperature, time and atmosphere on the relative density and nitrogen content were investigated. The results show that sintering temperature is the most important sintering parameter, with the increase of which the relative density of sintered specimens increases remarkably, whereas the nitrogen content decreases, and above 1 300 E the relative density of sintered specimens is over 99 %. Sintering time has no obvious effect on the relative density and nitrogen content, and when the sintering temperature is high enough, the excellent densification of the powder can be achieved within 2 h. For the sintering of 0Cr17Mn11Mo3N stainless steel, sintering atmosphere has also a significant influence, and the higher relative density and lower nitrogen content can be obtained in N2 ＋ H2 atmosphere than in high purity N2 atmosphere. The optimal sintering conditions of 0Crl7MnllMo3N austenitic stainless steel are as follows： 1 300 ℃, 2 h, and flowing high pure nitrogen. Under the optimal conditions, the relative density of sintered specimens can reach 99.1% and the mass fraction of nitrogen is as high as 0.78%.

关 键 词：无镍高氮不锈钢 粉末注射成形 烧结 相对密度 氮含量 

分 类 号：TF124.39[冶金工程—粉末冶金] TG142.71[冶金工程—冶金物理化学]