价值工程
價值工程
개치공정
VALUE ENGINEERING
2015年
13期
47-48,49
,共3页
模具钢D2%探伤合格率%碳化物
模具鋼D2%探傷閤格率%碳化物
모구강D2%탐상합격솔%탄화물
die steel D2%flaw detection qualified rate%carbide
通过对探伤不合格的D2模具扁钢的金相、电镜观察发现，粗大的碳化物碎裂是探伤不合格的根本原因。分析了粗大碳化物以及其碎裂的原因，降低了浇注温度，改进了锻造加热及变形工艺，控制了开坯总时间，最终使模具钢的探伤合格率由72.6%提高到94.5%。
通過對探傷不閤格的D2模具扁鋼的金相、電鏡觀察髮現，粗大的碳化物碎裂是探傷不閤格的根本原因。分析瞭粗大碳化物以及其碎裂的原因，降低瞭澆註溫度，改進瞭鍛造加熱及變形工藝，控製瞭開坯總時間，最終使模具鋼的探傷閤格率由72.6%提高到94.5%。
통과대탐상불합격적D2모구편강적금상、전경관찰발현，조대적탄화물쇄렬시탐상불합격적근본원인。분석료조대탄화물이급기쇄렬적원인，강저료요주온도，개진료단조가열급변형공예，공제료개배총시간，최종사모구강적탐상합격솔유72.6%제고도94.5%。
Through the flaw detection of the metallographic, electron microscope observation of unqualified flat die steel D2, it is found that the fundamental reason of unqualified is the coarse carbide fragmentation. Analysis of coarse carbides and the cause of its fragmentation are taken out to reduce pouring temperature, improve forging heating and deformation process, and control total time of blooming, and the flaw detection qualified rate of the die steel increased from 72.6%to 94.5%.
