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Hard superalloy layers

I. VIDA-SIMITI1,* , N. JUMATE1, R.D. KNOBLOCH1

Affiliation

  1. Technical University of Cluj - Napoca, Romania, 400641 Cluj Napoca, Bd. Muncii nr.103-105

Abstract

The vacuum coated green iron powder compacts with high-hardness layers of NiCrSiBC powders were prepared. Diffusioncoated layers have been obtained by compacting at atmospheric pressure. The microstructure, the hardness and microhardness of the coated layers in the diffusion zone and a diffusion model for carbon steel coated with NiCrSiBC superalloys are presented. The samples coated in a vacuum at the temperature of 1100°C (liquid phase sintering) have the lowest interface porosity and hardness between 700 – 1100 HV. The interdiffusion of nickel in iron substrate and iron in superalloy caused a good adhesion of the layer..

Keywords

Coated layers, Superalloy powder, Compacting at atmospheric pressure.

Submitted at: Oct. 12, 2008
Accepted at: Dec. 10, 2008

Citation

I. VIDA-SIMITI, N. JUMATE, R.D. KNOBLOCH, Hard superalloy layers, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3341-3345 (2008)