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Experimental Approach for Selection of Tool Steel Using Heat Treatment Process with MTTF and MTBF


Author(s):

KIRAN S. PHAD , AMRUTVAHINI COLLEGE OF ENGINEERING, SANGAMNER; Prof. Kiran S. Phad, Amrutvahini College of Engineering,; Prof. Ravindra E. Gite , Amrutvahini College of Engineering,; Prof. Amol L. Khatode, Samarth College of Engineering, ; Prof. Dipak S. Bajaj , Amrutvahini College of Engineering,

Keywords:

Heat treatment; Rockwell hardness; Brinell hardness; Vickers hardness; MTTF (Mean Time to Failure) and MTBF (Mean Time between Failure)

Abstract:

Tools steels are generally used in forming process of operation under definite mechanical properties of the sheet metal. At the same time failure of tools steels take place because of many number causes or insufficient material selection criteria. Under this paper we have taken the five samples as punch materials i.e. EN-31, OHNS, D-2, EN-9 and D-3 to find out the different causes of punch failures. Main objective is to study the effect on the hardness of tool steel after heat treatment processes. Also MTBF and MTTF are reliability terms based on methods and procedures for lifecycle predictions for a product. These terms providing a numeric value based on a compilation of data to quantify a failure rate and the resulting time of expected performance. The numeric value can be expressed using any measure of time, but hours is the most common unit in practice. Fracture surface displays typical ductile fracture, and the outer and inner surface of the part punched off is full of little bowings around which there are many micro cracks caused by the stretch stress under biaxial strain/stress state. This survey also helps to find out the failure mode appraisal in inner lower control arm and punch with their preventive methods.


Other Details:

Manuscript Id :IJSTEV2I8009
Published in :Volume : 2, Issue : 8
Publication Date: 01/03/2016
Page(s): 8-16
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