Structure and wear resistance of deposited alloys based on metastable chromium–carbon austenite

Abstract

The relationship of the phase composition and structure of two deposited alloys of the Fe–C–Cr system (150Kh8T2 and 600Kh28) with their wear resistance in the conditions of abrasive wear after quenching and subsequent tempering in a wide temperature range is investigated. The reduction of hardness and the increase in the temperature in heating in tempering of both alloys are caused by an increase in the amount of retained metastable austenite. The capacity of this type of austenite for deformation martensitic transformation results in an increase in the microhardness of the worn surface and wear resistance. Tempering after quenching reduces the hardness and wear resistance of both alloys.

Keywords::

• surfacing alloys
• abrasive wear
• quench and tempering temperature
• metastable retained austenite
• deformational-induced martensite
• deformation hardening