• CN:11-2187/TH
  • ISSN:0577-6686

›› 2013, Vol. 49 ›› Issue (18): 46-51.

• 论文 • 上一篇    下一篇

机械蓄能式高速压制设备的温高速压制试验研究

邵明;关航健;肖志瑜   

  1. 华南理工大学机械与汽车工程学院
  • 发布日期:2013-09-20

Experimental Study on Warm Powder High Velocity Compaction Conducted with Mechanical Energy Stored Type High Velocity Compaction Machine

SHAO Ming;GUAN Hangjian;XIAO Zhiyu   

  1. School of Automotive and Mechanical Engineering, South China University of Technology
  • Published:2013-09-20

摘要: 高速压制技术和温压技术是现代粉末冶金技术的两项重要技术革新。高速压制技术利用重锤高速打击粉末并将机械能瞬间注入粉体,具有流程短、致密度高的优点;温压成形技术将粉末和模具加热至一定温度可有效提高粉末的压制性能。温高速压制成形技术有机结合这两种新技术,在高速压制成形技术中引入粉末和模具加热环节,融合两种技术特有的粉末致密机理,有望进一步提高压坯密度水平。运用自行研制的机械蓄能式粉末高速压制成形试验机作为试验装置对水雾化铁粉进行机械蓄能式温高速压制正交试验,验证机械蓄能式高速压制的可行性,对温高速压制的成形规律进行研究,重点分析压制速度、粉末温度和冲击锤质量因素对压坯密度的影响。实践证明,机械蓄能式粉末高速压制成形试验机可以满足高速压制工艺要求,温高速压制试样的最大压坯密度可达到7.84 g cm3,理论相对密度达到99.7%,接近全致密。研究表明,温高速压制影响压坯密度的最重要因素是压制速度,其次为粉末加热温度和冲击锤质量。

关键词: 粉末冶金, 高速压制, 正交试验

Abstract: High velocity compaction(HVC) and warm compaction(WC) are both new powder metallurgy technologies. HVC densifies powder by high speed hammering, has advantages of low cost, short flow process and high density. WC heats the powder and model to some extent helps enhance the powder compact property. Warm high velocity compaction(WHVC) is a technology which merges both HVC and WC advantages, introducing the powder and mold heating into HVC procedure, hopefully further increase the compact density. By using mechanical energy stored type HVC machine, WHVC orthogonal experiment of water atomized pure iron powder is carried on. The feasibility of mechanical energy stored type HVC is testified. WHVC forming Laws specifically the compact velocity, powder temperature and hammer weight affection on green density is studied. Practices prove that the mechanical energy stored type HVC machine can fulfill the HVC procedure. Max green density of WHVC compacts can reach 7.84 g cm3, relative density reaches 99.7%, which is close to full density. The research reveals that the compact velocity plays the most important role on affecting green density in WHVC, after that is the powder temperature and hammer weight.

Key words: High velocity compaction, Orthogonal test, Powder metallurgy

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