粉末高速压制技术的发展现状

粉末高速压制成形（HVC）技术在2001年由瑞典H6ganasAB公司提出，并在瑞典Hydropulsor公司生产的HVC设备上实现了速度≤10m·s^-1的压制成形。高速压制成形原理是通过应力波在粉体中的传播使粉末致密，该技术具有压制生坯密度高、密度分布均匀、产品综合性能优异的特点，可以通过连续多次压制实现小设备压制大零件等，所以备受青睐。多个国家的研究者开展了相应的研究工作，材料涉及铁、铜、钛及其合金、磁性材料、陶瓷材料等。高速压制的粉末致密化机理不同于传统压制，今后还有待进一步深入开展研究。

Development of Powder High Velocity Compaction Technology

High velocity compaction（HVC） technology was put forward by Hsganas AB company, Sweden in 2001 and carried out on HVC machine produced by Hydropulsor company, Sweden with the compaction velocity no greater than 10 m · s^-1. By the propagation of the stress wave through the powders, densification of the powders was realized. Due to the advantage of high and uniform density, excellent mechanical properties and capability of multiple impacts, this tech- nology attracted more attention. The researchers in the world carried out the investigation on various kinds of powders such as iron, copper, titanium and the alloys, magnetic and ceramic materials. The densification mechanism of HVC is waiting for further study.