粉末冶金高速压制成形的压制方程

Compaction equation for high velocity compact shaping of powder metallurgy

瑞典Hydropulsor AB制造并出售其独创的液压冲击机后,解决了长期以来限制高速压制技术工业化应用的设备问题,使该技术得到极大的推动。文内介绍了高速压制的特点,如压制压力、压制速度、压坯密度分布,脱模压力等;对高速压制致密化机制进行了探讨,提出了“热软化剪切致密化机制”,据此给出了相应的压制方程lnφ=k1ΔHL/k2exp[k2(1-P/ΔHL)]+C。并利用实验数据进行了验证。结果表明,该方程具有满意的精度和广泛的适用性。

Hydropulsor AB. Sweden, has solved the facility problem that restrieted the industrial application of high velocity compaction（HVC） technique after it manafactured and sold its onique hydraulic intpactor, which will certainly speed up the development of the HVC technique greatly. Hereby the characteristics of the HVC technique is introduced which contain the compactiou pressure, compaction velocity, and density distribution of green compact and the ejection pressure as well. A thermal softening shear densification mechanism during powder metallurgy（P/M） high velocity compaction is proposed and dicussed, and a corresponding compaction equation： Inφ=k1△HL/k2 exp[kz（1-P/△HL）＋C, is derived, which is Supported and proved by the author＇s experimental rest, hsand the published data. The experimental rest, Its show that this equation has satisfying precision and comprehensivc applicability.