High Speed Steel with Iron Addition Materials Sintered by Spark Plasma Sintering

Marcin Madej,Dariusz Garbiec,Beata Leszczyńska-Madej

doi:10.3390/met10111549

Abstract

Attempts were made to describe the effect of the sintering temperature and pure iron powder addition on the properties of high speed steel based materials produced by the spark plasma sintering technique. After sintering, their density, hardness, flexural strength, and tribological properties were determined. The sintered materials were also subjected to microstructural analysis in order to determine the phenomena occurring at the particle contact boundaries during sintering. Based on the analysis of the obtained results, it was found that the mechanical properties and microstructure were mainly influenced by the sintering temperature. Using the temperature of 1000 °C allowed materials with a density close to the theoretical density to be obtained, characterized by a high hardness of about 360 HB and a low wear rate of about 1E-07 g/s.

Highlights

High speed steels (HSSs) are materials that have been known for years and are produced in two ways—traditionally and, since around 1965, by powder metallurgy (PM) technology [1,2]
The friction is similar in the areas of steel, but the elements that block the wear are carbides strongly fixed in the steel, especially the MC type
Materials on a matrix of M3/2 HSS with a 50% iron addition obtained by the spark plasma sintering (SPS) process at 900, from the matrix of the HSS

Summary

Introduction

High speed steels (HSSs) are materials that have been known for years and are produced in two ways—traditionally and, since around 1965, by powder metallurgy (PM) technology [1,2]. Some of the applications of tools and HSSs produced by PM are in conditions where the priority is good wear resistance, even at higher temperatures. Valve seat inserts, and oil pump components. In these applications, the material must exhibit resistance to oxidation, as well as high hot strength and hardness. Some authors present the possibility of using the addition of carbides (TiC, TaC, WC) to improve sinterability (due to the release of additional carbon) as well as improve the hardness and wear resistance of such materials [3,5,6,7]

Methods

Results

Conclusion