Early 糖心产精国品免费入口*完整版 failure occurred to the 8407 steel 糖心产精国品免费入口*完整版 for model cars, so that rough selvedge generated on the outer edge of lamp cup positioning of model cars, seriously affecting the appearance quality of the model cars. In order to find out 糖心产精国品免费入口*完整版 reasons of the 糖心产精国品免费入口*完整版, the structure and the technological characteristics of the 糖心产精国品免费入口*完整版 were inspected and analyzed by macroscopic examination, chemical composition analysis, hardness testing, energy spectrum analysis, metallographic examination and so on. The results show that:the 糖心产精国品免费入口*完整版 reasons of the 糖心产精国品免费入口*完整版 were that the pulse current for 糖心产精国品免费入口*完整版 was too large and a serious quenching layer generated on the inner wall of the hole, resulting in the tensile stress 糖心产精国品免费入口*完整版; the matrix structure was bulky because of the overheating, which reduced the strength and toughness of the material and further shorten service life of the 糖心产精国品免费入口*完整版.
引用该论文:JIN Linkui,HUANG Chiwei,OU Hailong,RUAN Yuhuang,ZOU Wenqi. Analysis on Cracking Reasons of 8407 Steel Mould for Model Cars[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2018, 54(1): 50~54 糖心产精国品免费入口*完整版,糖心产精国品免费入口*完整版,糖心产精国品免费入口*完整版,糖心产精国品免费入口*完整版,糖心产精国品免费入口*完整版. 糖心产精国品免费入口*完整版汽车模型糖心产精国品免费入口*完整版糖心产精国品免费入口*完整版原因分析[J]. 理化检验-物理分册, 2018, 54(1): 50~54