The surface treatment of a metal thing - Hard Technologies Proprietary Limited

Title:

The surface treatment of a metal thing

Document Type and Number:

Japanese Patent JP5951623

Kind Code:

B2

Abstract:

A process for forming an outer diffusion surface layer on a metal substrate or member includes in a first activation stage of an inert particulate refractory material and a metal based material including metals and metal halides. An inert gas and hydrogen halide gas is introduced into the inert particulate refractory material and the metal based material to activate an outer surface of the metal based material. The metal substrate is pretreated to form a diffusion zone extending inwardly from the outer surface of the metal substrate having nitrogen forming an inner diffusion zone and an outer compound or white layer of an iron nitride, an iron carbide or an iron carbonitride compound without an oxide layer. A subsequent diffusion stage treats the metal substrate in an inert gas, in the absence of hydrogen halide gas to form the diffusion surface layer on the metal substrate.

Inventors:

Fabianic, Daniel

Application Number:

JP2013539096A

Publication Date:

July 13, 2016

Filing Date:

November 17, 2011

Export Citation:

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