Ulf Engström

Chromium may give pre-alloys the cost edge

Pre-alloyed PM powders are a possible route to materials with the high performance levels needed to impress customers and win the breaks into new markets and new applications. Using modern chrome pre-alloys may satisfy the ever-important requirement to contain costs…

Material Properties of Heat Treated Double Pressed/Sintered P/M Steels in Comparison to Warm Compacted/Sinter Hardened Materials

Warm Compaction of Densmix powders provides means to produce P/M parts with densities in the range of 7.1 to 7.4 g/cc. As most properties are improved by increased density, the warm compaction method offers possibilities to increase the competitiveness of P/M compared to other manufacturing techniques. In this paper a comparison of material properties obtained by two different manufacturing routes is presented. Heat treated properties of some P/M steels after double pressing/sintering are compared with properties obtained with sinterhardening of warm compacted Densmix powders.

Integrating views can bring real production gains

Maintaining competitive edge over other manufacturing techniques is vital to the future of PM. It must continue to offer solutions that combine high demands on both mechanical properties and close tolerances of sintered components in a robust, reliable and productively cost-effective way. A group of engineers brought thinking from different disciplines to bear…

Chrome is good in high strength PM applications

Sky high prices for PM steel alloy ingredients mean that new candidates have to be considered in the continuing quest for cost effective high strength products…

High Performance Planetary Gears for Heavy Duty Automotive Transmissions

Planetary gears in heavy truck gearboxes are normally manufactured by forging a blank, turning, hobbing, shaving and heat-treatment followed by grinding. Due to the size of the gear the net shape capability of PM methods can be cost effective alternatively to conventional manufacturing. Warm compaction and surface densification are two PM methods to reach high density and thereby high strength and fatigue properties. Typical characteristics for PM gears manufactured by these methods are outlined.

Low alloy powders may point way to cost-effective high performance

With automotive customers demanding more performance at lower cost, metal powder makers have a real interest in optimising product performance…