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對于黃銅板開(kai)(kai)(kai)裂可分(fen)為(wei)表(biao)(biao)面(mian)(mian)或(huo)邊部開(kai)(kai)(kai)裂和中(zhong)心開(kai)(kai)(kai)裂。錠坯(pi)(pi)表(biao)(biao)面(mian)(mian)缺陷(xian)(xian)和內部缺陷(xian)(xian)均可導致(zhi)熱(re)軋(ya)(ya)(ya)(ya)(ya)過(guo)(guo)(guo)程中(zhong)材料局部強度(du)(du)偏低或(huo)缺陷(xian)(xian)延展,引(yin)(yin)起熱(re)軋(ya)(ya)(ya)(ya)(ya)開(kai)(kai)(kai)裂。所以加熱(re)溫度(du)(du)過(guo)(guo)(guo)高或(huo)保溫時間過(guo)(guo)(guo)長,導致(zhi)錠坯(pi)(pi)局部過(guo)(guo)(guo)燒或(huo)過(guo)(guo)(guo)熱(re)熱(re)軋(ya)(ya)(ya)(ya)(ya)工藝。開(kai)(kai)(kai)軋(ya)(ya)(ya)(ya)(ya)溫度(du)(du)較(jiao)高,軋(ya)(ya)(ya)(ya)(ya)件(jian)(jian)變(bian)(bian)(bian)形區部分(fen)為(wei)黏著區,外(wai)摩(mo)擦(ca)系數(shu)較(jiao)大(da),引(yin)(yin)起軋(ya)(ya)(ya)(ya)(ya)件(jian)(jian)不均勻(yun)變(bian)(bian)(bian)形,而軋(ya)(ya)(ya)(ya)(ya)件(jian)(jian)表(biao)(biao)面(mian)(mian)因拉應力過(guo)(guo)(guo)大(da)產生表(biao)(biao)面(mian)(mian)開(kai)(kai)(kai)裂,合理安(an)排道次(ci)壓下量首(shou)道次(ci)壓下量不易過(guo)(guo)(guo)大(da);前幾道次(ci)采用低速軋(ya)(ya)(ya)(ya)(ya)制。采用擦(ca)輥、潤滑等先進措施減(jian)小(xiao)接觸面(mian)(mian)摩(mo)擦(ca)系數(shu),保證(zheng)錠坯(pi)(pi)內外(wai)變(bian)(bian)(bian)形均勻(yun)。而軋(ya)(ya)(ya)(ya)(ya)件(jian)(jian)中(zhong)心層產生沿錠坯(pi)(pi)中(zhong)心面(mian)(mian)張嘴(zui)開(kai)(kai)(kai)裂。
阻止控制措施:錠坯接觸面無冷隔、夾渣、劃痕等一些缺欠,錠坯內壁無縮孔、不結實、劃痕等一些缺欠。在銅質板不規則存在偶爾突起、流爪、冷隔等,可正確人為修剪,但不容許存在淬硬層≥3mm、長深比≥6、寬深比≥4的修復系統坑。以上就是璟銅銅業小編為大家整理的超薄H65黃銅板裂(lie)開的原因分析及(ji)防止措施,如想了解(jie)更多相關資訊,大家可及(ji)時關注洛陽璟(jing)銅(tong)銅(tong)業(ye)有(you)限(xian)公司官網或撥(bo)打咨(zi)詢電話:0379-64896296!
以上內容來自洛陽璟銅銅業有限公司官網://nangguai.cn
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