Formation of Multiple Phase Microstructure and Wear Investigation on Treated AISI 904L SS by Low Temperature Ion Nitriding Process

Ram Subbiah,S Ravi Sekhar,B Tanya,A Anitha Lakshmi,N Sateesh,S.K Singh,S Tummala,S Singh,P Bobba,S Kosaraju

doi:10.1051/e3sconf/202018401001

Abstract

In industries, components have to operate under extreme prerequisites such as high load, speed, temperature and at a chemical environment. The materials are selected by commercial availability, cost and by considering by their properties like strength, hardness etc. AISI 904L is a high alloy stainless steel with low carbon content material having poor hardness on the surface and negative wear properties. Many of the engineering failures are due to fatigue, corrosion and poor wear resistance which are initiated in its surface. This causes cracks in the surface which reduces the life of the material. Also the surfaces of the materials are caused by severe thermal, chemical and shock loads. Chosen for this work, AISI 904L materials were subjected to plasma or ion - nitriding process and were treated to 3 different timing parameters like 24 hrs, 48 hrs and 72 hrs respectively, maintaining constant temperature of 650oC. Among the availability of other nitriding process like gas and liquid nitriding, plasma nitriding gives good dimensional stability, uniform treatment, less distortion, uniform case depth irrespective towards size and shape of the specimen. For analyzing the wear properties, a pin on disc machine is utilized making the pin to get weared on disc against a load of 100N at a speed of 1000 rpm. Finally the metallographic studies were done by Scanning Electron Microscopic analysis.

Highlights

To make successful use of the stainless steels, in wear resistant applications, it's necessary to understand the properties, their capabilities regarding corrosion resistance, the supply of product forms and surface finishes stainless steels are getting used for both corrosion and the heat resisting applications[13]
Stainless steels are known for resistance to corrosion and marking, low maintenance, relative in expense. and familiar luster make it a perfect base material for a number of economic applications
AISI 904L material containing composition of 0.02% C, 2% Mn. 1% Si, 0.04% P, 19% Cr, 0.03% S, 23% Ni, 3% Mb, Remaining Fe were utilized in the investigations, the composition is shown in Table 1were prepared in circular shaped rods and discs

Summary

Introduction

To make successful use of the AISI 904L stainless steel in wear resistant applications and for excessive temperature applications, its mechanical properties needs to be improved, with stabilityindimensions. AISI 904L Stainless steels have resistance to corrosion and staining, low maintenance, relative less expensive and familiar luster make it an ideal base material for a host of business functions [9,10]. Though these stainless steels characterize a low share of the complete amount of metal produced, they have a technological and financial significance because they are the key materials for chemical, petroleum, manner and strength industries. The excessive levels of chromium make a contribution to the first-rate wear behavior in austenitic stainless steel, making it suitable for use in submarines and nuclear power plant [13,14,15]

Material Preparation

Process Performed

Scanning Electron Microscope Results

Conclusion