執(zhí)行器IC20-30Q3T芯科技，芯創(chuàng)新；03352508
用于試樣準備的淬火方法認為是可行的。在采用CMn(VNb)鋼驗證淬火方法可行后，冶煉了低、中、高Nb含量而Mn、SAl及N處于同一水平的三爐鋼。設計這三種成分鋼，目的是確定鑄坯在進入熱機軋前，在鑄坯不同位置（也就是鑄坯不同溫度處）及不同合金含量下Nb的析出行為。三種鋼依次連鑄，保證鑄造工藝參數(shù)相同。對每一種鋼，從鑄機底部及進軋機前的坯料上取樣。采用淬火試驗試樣準備方法來進行研究鋼的樣品準備。
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加入渣鐵的過程中，掉落的渣鐵將對鐵水包內(nèi)耐火材料形成嚴重的機械沖擊。六是可逆熱膨脹。耐火材料一般具有可逆熱膨脹特性，即熱脹冷縮。裝滿鐵水時，鐵水包襯高度方向可能產(chǎn)生約40mm的膨脹量，考慮鋼殼膨脹和磚縫的吸收，其膨脹量仍然可觀；而空包時，包襯溫度降低到800℃～600℃。如此反復冷熱，可能造成包壁和渣線磚的整體結(jié)構的破壞，導致包壁或渣線出現(xiàn)橫向裂縫，而裂縫處極易出現(xiàn)鉆鐵現(xiàn)象，從而可能對工作襯和襯造成損壞，嚴重時，將導致漏包事故的發(fā)生。
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