Toz metalurjisi tekniği ile üretilen kobalt esaslı süperalaşımlarda element ilavelerinin mikroyapı ve mekanik özelliklere etkisi

Abstract

In this study, the effect of Fe and B elements on the microstructure and mechanical properties of Stellite 6 superalloy materials produced from elemental powders by powder metallurgy (P/M) technique was investigated. Powder mixtures contained different Fe and B content were prepared from high purity elemental powders. The prepared powder mixtures were shaped by P/M method and then sintered at various temperatures. The success of sintering operations was determined by density measurements. Microstructural characterization was carried out with X-ray diffraction analysis (XRD), scanning electron microscope (SEM) and energy dispersive spectrometry (EDS). Microhardness measurements were conducted for to characterize mechanical properties. Due to large particle size of the used Cr powder coarse carbides formed in the microstructure of Stellite 6 samples. Relative density values increased slightly with B addition. Relative density was increased dramatically by the addition of Fe element with B.

Keywords

• Stellite 6
• B addition
• Fe addition
• density
• microstructure
• hardness