Flowability of steel and tool steel powders: A comparison between testing methods

Spark Plasma Co-Sintering of Mechanically Milled Tool Steel and High Speed Steel Powders

Hot work tool steel (AISI H13) and high speed steel (AISI M3:2) powders were successfully co-sintered to produce hybrid tool steels that have properties and microstructures that can be modulated for specific applications. To promote co-sintering, which is made difficult by the various densification kinetics of the two steels, the particle sizes and structures were refined by mechanical milling ...

Edm of Tool Steel

Comparison of different flowability tests for powders for inhalation

A series of placebo powders for inhalation was characterized regarding bulk density and powder flowability using different techniques. The powders were of the ordered mixture type and were prepared by mixing a pharmaceutical carrier grade of lactose with different fractions of intermediate sized and fine (i.e., micronized) lactose. A modified Hausner Ratio was obtained by measurement of the pou...

Application of Wavelet Methods to Magnetic Testing of Steel Ropes

The paper refers to problems related to processing of non-stationary signals. The signals originated from non-destructive testing of steel ropes using a magnetic method, where non-stationary features are related to presence in the signal of an impulse component. This component can be a symptom of a failure and its proper identification is necessary while estimation of a rope's wear and tear. Cl...

Ultrasonic Testing of Steel Castings

Calibration and Reference Blocks ................................................................. 7 Longitudinal Wave Probes ............................................................................. 7 Transverse Wave Probes ............................................................................. 10 Measurement of Steel Thickness ...........................................................