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標題Title: Effect of cryogenic treatment on tensile behavior
作者Authors: 曾信智,吳宗彥..等
上傳單位Department: 機械工程系
上傳時間Date: 2009-11-25
上傳者Author: 曾信智
審核單位Department: 機械工程系
審核老師Teacher: 曾信智
檔案類型Categories: 課堂報告In-class Report
關鍵詞Keyword: deep cryogenic treatment (DCT), shallow cryogenic treatment (SCT) and conventional heat treatment (CHT)
摘要Abstract: This paper deals with the influence of cryogenic treatment on the tensile behavior of case carburized steel 815M17.
The impetus for studying the tensile properties of gear steels is to ensure that steels used in gears have sufficient tensile strength to prevent failure when gears are subjected to tensile or fatigue loads,and to provide basic design information on the strength of 815M17 steel.
A comparative study on the effects of deep cryogenic treatment (DCT), shallow cryogenic treatment (SCT) and conventional heat treatment (CHT) was made by means of tension testing.
The present results confirm that the tensile behavior is marginally reduced after cryogenic treatment for 815M17 when compared with conventional heat treatment.
Scanning electron microscopic (SEM) analysis of the fracture surface indicates the presence of dimples and flat fracture regions are more common in SCT specimens than for CHT and DCT-processed material.

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