Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)

2008 ◽  
Author(s):  
Keyword(s):  
Powder Metallurgy ◽  
Base Powder

Study on Warm Flow Compacted Tungsten-Based Alloy Powder for Cross-Shape Part

2007 ◽  
Vol 561-565 ◽  
pp. 921-924
Author(s):  
Zhi Yu Xiao ◽  
Jun Wang ◽  
Tungwai Leo Ngai ◽  
Ming Shao ◽  
Yuan Yuan Li
Keyword(s):  
Powder Metallurgy ◽  
Alloy Powder ◽  
Lateral Pressure ◽  
Lateral Flow ◽  
Axial Pressure ◽  
Powder Blend ◽  
Base Powder ◽  
Lateral Distance ◽  
Special Apparatus ◽  
Complex Powder

Warm flow compaction is a new, simple and economy process that can produce complex powder metallurgy parts. A special apparatus for measuring the lateral flow capability of the powder was designed and manufactured. It can be used to analyze the feasibility of forming complex cross-shaped parts. The preparation of the powder blend and effects of pressing speed, temperature and axial pressure on the lateral flow capability of a tungsten-base powder mix were investigated. Results showed that the lateral-pressure increased with increased pressing speed and increased applied axial-pressure. The lateral-pressure decreased as lateral-distance increased. Biggest lateral-pressure was obtained when the powder blend was pressed at around 96 °C, at which the binder start to melt. In this study cross-shaped powder metallurgy parts were successfully prepared by warm flow compaction.

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