理化检验-物理分册
理化檢驗-物理分冊
이화검험-물리분책
Physical Testing and Chemical Analysis Part A:Physical Testing
2015年
11期
810-813
,共4页
Q345R钢板%气割%卷筒%过烧%增碳%淬火开裂
Q345R鋼闆%氣割%捲筒%過燒%增碳%淬火開裂
Q345R강판%기할%권통%과소%증탄%쉬화개렬
Q345R steel plate%gas cutting%coiling%over burning%carburizing%quenching crack
某化工机械厂一块厚95 mm 的 Q345R 钢板在卷筒生产过程中发生断裂，采用宏观检验、化学成分分析、力学性能测试及金相检验方法对 Q345R 钢板断裂的原因进行了分析。结果表明：Q345R钢板在卷筒前，端面气割倒焊接坡口的表层毛刺未清除，残留了过烧、增碳、淬火开裂层，在卷筒外力的作用下裂纹迅速扩展，导致 Q345R钢板的断裂。
某化工機械廠一塊厚95 mm 的 Q345R 鋼闆在捲筒生產過程中髮生斷裂，採用宏觀檢驗、化學成分分析、力學性能測試及金相檢驗方法對 Q345R 鋼闆斷裂的原因進行瞭分析。結果錶明：Q345R鋼闆在捲筒前，耑麵氣割倒銲接坡口的錶層毛刺未清除，殘留瞭過燒、增碳、淬火開裂層，在捲筒外力的作用下裂紋迅速擴展，導緻 Q345R鋼闆的斷裂。
모화공궤계엄일괴후95 mm 적 Q345R 강판재권통생산과정중발생단렬，채용굉관검험、화학성분분석、역학성능측시급금상검험방법대 Q345R 강판단렬적원인진행료분석。결과표명：Q345R강판재권통전，단면기할도한접파구적표층모자미청제，잔류료과소、증탄、쉬화개렬층，재권통외력적작용하렬문신속확전，도치 Q345R강판적단렬。
One piece of Q345R steel plate (thickness 95 mm)fractured during coiling process in one chemical machinery plant.The fracture reason was analyzed through macroscopic inspection,chemical compositions analysis, mechanical properties test and metallographic inspection.The results show that burrs on surface layer produced in the process of gas cutting groove were not clear away before coiling,and over burning,carburizing and quenching cracking layer were remained.The crack expanded quickly under the action of external force in coiling process,and eventually led to the fracture of the Q345R steel plate.
