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1、........畢業(yè)課題課題名稱:連鑄坯質(zhì)量控制學(xué) 號姓 名專業(yè)班級指導(dǎo)教師2014年06月21日參考.資料........摘要連鑄坯質(zhì)量決定著最終產(chǎn)品的質(zhì)量。從廣義來說所謂連鑄坯質(zhì)量是得到合格產(chǎn)品所允許的連鑄坯缺陷的嚴重程度,連鑄坯存在的缺陷在允許范圍以內(nèi),叫合格產(chǎn)品。連鑄坯質(zhì)量是從以下幾個方面進行評價的:(1)連鑄坯的純凈度:指鋼中夾雜物的含量,形態(tài)和分布。(2)連鑄坯的表面質(zhì)量:主要是指連鑄坯表面是否存在裂紋、夾渣及皮下氣泡等缺陷。連鑄坯這些表面缺陷主要是鋼液在結(jié)晶器內(nèi)坯殼形成生長過程中產(chǎn)生的,與澆注溫度、拉坯速度、保護渣性能、浸入式水口的設(shè)計,結(jié)晶式的內(nèi)腔形狀、水縫均勻
2、情況,結(jié)晶器振動以及結(jié)晶器液面的穩(wěn)定因素有關(guān)。(3)連鑄坯的內(nèi)部質(zhì)量:是指連鑄坯是否具有正確的凝固結(jié)構(gòu),以及裂紋、偏析、疏松等缺陷程度。二冷區(qū)冷卻水的合理分配、支撐系統(tǒng)的嚴格對中是保證鑄坯質(zhì)量的關(guān)鍵。(4)連鑄坯的外觀形狀:是指連鑄坯的幾何尺寸是否符合規(guī)定的要求。與結(jié)晶器內(nèi)腔尺寸和表面狀態(tài)及冷卻的均勻程度有關(guān)。本文從以上四個方面對實際生產(chǎn)中連鑄坯的質(zhì)量控制采取的措施進行說明。關(guān)鍵詞:連鑄坯、質(zhì)量、控制參考.資料........AbstractCastingbilletqualitydeterminesthequalityofthefinalproduct.Fromthegenera
3、lizedcastingbilletqualityisforso-calledgetqualifiedproductsallowedbytheseverityofcastingbilletdefects,thedefectsofcontinuouscastingslabinallowingscope,callofqualifiedproducts.Castingbilletqualityfromthefollowingseveralaspectstoevaluate:(1)Isdramatically:referstothecontinuouscastingslabinsteeli
4、nclusioncontent,formanddistribution.(2)Thesurfaceofcontinuouscastingslabquality:mainlyreferstotheexistenceofcastingbilletsurfacecracks,slaginclusionandsubcutaneousbubbleetcdefects.Thesesurfacedefectscastingbilletismainlyinthecrystallizerliquidsteelsolidifiedshellproducesintheprocessofforminggr
5、owth,andpouringtemperature,throwingspeed,protectionofslag,intothedesign,crystallizationtypespouttheinnerchambershape,water,seamuniformmouldoscillationandmouldtheliquidsurfacestabilityfactors.(3)Theinternalqualityofcastingbillet:referstowhetherhasthecorrectcastingbilletsolidificationstructure,a
6、ndcrack,segregation,loosedefectssuchasdegree.Twocolddistrictcoolingwaterrationing,supportingsystemforthestrictistheguaranteeofbilletqualityinthekey.(4)Theappearanceofcontinuouscastingslabshape:referstothegeometricsizeofcastingbilletcompliancewithrequirements.Andthemouldcavitydimensionsandwithi
7、ntheuniformcoolingsurfacestateanddependon.Thisarticlefromtheabovefouraspectstoactualproductionof參考.資料........castingbilletqualitycontrolmeasurestakenforinstructions.Keywords:castingbillet,quality,control參考.資料........目錄摘要................