4J32 Invar合金的注射成形  

Powder Injection Molding of 4J32 Invar Alloy

作　　者：马书旺[1] 段伯华[1] 高鹏[1] 秦明礼[1] 曲选辉[1] 程彤[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《真空电子技术》2006年第4期55-58,共4页Vacuum Electronics

摘　　要：以铁粉、镍粉和钴粉为原料，研究了4J32 Invar合金的注射成彤工艺。选择了一种适合4J32 Invar合金注射成形的粘结剂体系。在烧结温度为1350℃，烧结时间为120min，烧结气氛为H2时，烧结样品的致密度达到97．1％。在低于100℃的范围内，烧结样品的膨胀系数小于0．64×10^-6／K，完全符合低膨胀系数的合金的要求：在20～100℃范围内，其热膨胀系数α≤1.8 ×10^- 6/℃.Powder injection molding of 4J32 Invar alloy was studied using powders of Fe, Ni, Co as raw materials and a kind of wax-based polymer was selected as suitable binders for powder injection molding of 4J32 Invat alloy. The relative density reached 97.1% when the sintered temperature was at 1350 ℃, the sintered time was 120 minutes and hydrogen was selected as the sintered atmosphere. Below 100 ℃, the thermal expansion coefficient of the sintered part was smaller than 0.64 × 10^-6/K, which measures up the demands of Invar low expansion alloy （Invar alloy） totally： between 20-100℃ the thermal expansion coefficient α≤1.8 ×10^- 6/℃.

关 键 词：4J32 Invar合金 注射成形 热膨胀系数 

分 类 号：TG13[一般工业技术—材料科学与工程]