金属粉末注射成形技术是一种高效的近净成形技术,适用于生产小型的、具有复杂形状的零部件.本文综述了金属粉末注射成形技术的发展历程；概述了金属粉末注射成形原理,包括粉末和粘结剂的选择、混炼,注射成形及后续的脱脂、烧结；并介绍了金属粉末微注射成形技术的技术特点、注射工艺和微注射成形的应用；分析了金属粉末注射成形技术的局限性；展望了金属粉末注射成形技术的发展趋势,认为预制复合粉末有助于解决混炼和注射造成的成分不均匀,减小烧结过程由于收缩不均匀导致的制件变形,且应开发新的粘结剂和脱脂工艺以减少脱脂后其在材料中的残留和碳化,开发少粘结剂注射成形工艺.
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