Kwishishini lentsimbi, sihlala siva malunga neengqikelelo zokuqengqeleka okushushu kunye nokuqengqeleka okubandayo, ngoko ke zithini?
Enyanisweni, iibhilidi zetsimbi eziveliswa kwisityalo se-steelmaking ziyimveliso ezigqityiweyo kuphela kwaye kufuneka zigqitywe kwi-rolling mill ukuze zibe yimveliso yensimbi efanelekileyo.Ukuqengqeleka okushushu kunye nokuqengqeleka okubandayo ziinkqubo ezimbini eziqhelekileyo zokuqengqeleka.
Ukuqengqeleka kwentsimbi kuqhutyelwa ikakhulu ngokushushumbisa, ngelixa ukubanda okubandayo kusetyenziselwa ikakhulu ukuvelisa amacandelo amancinci amancinci kunye namacwecwe amancinci.
Ezi zilandelayo ziimeko ezibandayo kunye nezishushu eziqengqelekayo zentsimbi:
Ucingo: kunye nobubanzi be-5.5-40 millimeters, ehlanganiswe kwiikhoyili, zonke zenziwe ngezinto ezishushu ezishushu.Emva komzobo obandayo, yeyezinto ezitsalwa ngokubanda.
Intsimbi ejikelezayo: Ukongeza kwizinto ezichanekileyo ezinobungakanani obukhanyayo, ngokuqhelekileyo ishushu-isolwe kwaye kukwakho nezixhobo ezibunjiweyo (ezinamanqaku okubumba kumphezulu).
Intsimbi ye-Strip: zombini i-hot-rolled and cold-rolled iyafumaneka, kunye ne-cold-rolled material iyancipha ngokubanzi.
Ipleyiti yentsimbi: Ipleyiti eqengqelekayo ebandayo ngokuqhelekileyo ibhityile, njengepleyiti yemoto;Zininzi iipleyiti ezishushu eziqengqelekayo eziphakathi nezityebileyo, ezinye ezinobungqingqwa obufana nobo bubandayo, kodwa inkangeleko yazo yahluke kakhulu.I-angle steel: zonke zishushu-ziqengqiwe.
Imibhobho yentsimbi: yomibini ediyiweyo, eshushu-isolwe, kwaye izotywe ngokubanda.
Intsimbi yomjelo kunye nentsimbi ye-H: i-hot-rolled
Imivalo yentsimbi: izinto ezishushu eziqengqelekayo.
I-Hot rolling and cold rolling zombini iinkqubo zokwenza iiplate zetsimbi okanye iiprofayili, ezinempembelelo enkulu kwi-microstructure kunye neempawu zensimbi.
Ukuqengqeleka kwentsimbi kusekelwe ikakhulu ekuqengqelekeni okushushu, ngelixa ukuqengqeleka okubandayo kudla ngokusetyenziswa kuphela ukuvelisa intsimbi echanekileyo efana nentsimbi yecandelo elincinci kunye namacwecwe amancinci.
Ubushushu bokupheliswa kokuqengqeleka okushushu buyi-800-900 ℃, kwaye ke bupholiswa ngokubanzi emoyeni, ngoko ke imeko yokuqengqeleka eshushu ilingana nonyango oluqhelekileyo.Uninzi lwentsimbi luqengqeleka kusetyenziswa indlela eshushu yokuqengqeleka.Insimbi ehanjiswa kwimeko eshushu, ngenxa yobushushu obuphezulu, yenza i-iron oxide phezu komhlaba, enomlinganiselo othile wokumelana nokubola kwaye inokugcinwa ngaphandle.Kodwa lo maleko we-iron oxide nawo wenza umphezulu wentsimbi eshushu-eqengqelekayo urhabaxa, kunye nokuguquguquka okukhulu kobukhulu.Ke ngoko, intsimbi efuna umphezulu ogudileyo, ubungakanani obuchanekileyo, kunye neempawu ezilungileyo zoomatshini kufuneka ziveliswe kusetyenziswa isiqingatha-esigqityiweyo okanye iimveliso ezigqityiweyo njengemathiriyeli ekrwada emva koko ziqengqiwe ngokubanda.
Izinto eziluncedo: Isantya sokubumba ngokukhawuleza, isivuno esiphezulu, kwaye akukho monakalo kwi-coating.Ingenziwa kwiifom ezahlukeneyo ze-cross-sectional ukuhlangabezana neemfuno zemiqathango yokusetyenziswa;Ukuqengqeleka okubandayo kunokubangela ukuguqulwa okukhulu kweplastiki yentsimbi, ngaloo ndlela kwandisa isivuno sayo.
Ukungalungi: 1. Nangona kungabikho ukunyanzeliswa kweplastiki ye-thermal ngexesha lenkqubo yokwenza, uxinzelelo oluseleyo lusekho kwicandelo, elichaphazela ngokungenakuphikiswa iimpawu ze-buckling jikelele kunye neendawo zentsimbi;
2. Isitayela sensimbi epholileyo epholileyo ngokuqhelekileyo icandelo elivulekileyo, elinciphisa ukuqina kwe-torsional yamahhala yecandelo.I-Torsion ithande ukwenzeka xa iphantsi kokugoba, kwaye ukugoba i-torsion buckling ithande ukwenzeka xa iphantsi koxinzelelo, okukhokelela ekusebenzeni kakubi kwe-torsional;
3. Intsimbi eyenziweyo epholileyo inodonga oluncinci oluncinci kwaye alukho ukuqina kwiikona zokudityaniswa kwepleyiti, okubangelwa amandla abuthathaka okumelana nemithwalo egxininisiweyo yendawo.
I-Cold rolling ibhekisela kwindlela yokuguqa yokutshintsha imilo yentsimbi ngokuyicinezela ngoxinzelelo lwe-roller rolling kwiqondo lokushisa.Nangona inkqubo yokucubungula inokubangela ukuba ipleyiti yentsimbi ifudumale, isabizwa ngokuba yi-cold rolling.
Ngokukodwa, ukuqengqeleka okubandayo kusebenzisa iikhoyili zentsimbi ezishushu-eqengqelekayo njengezinto ezikrwada, zihlanjwa ngeasidi ukuze zisuse izikali ze-oxide, emva koko ziqhubeke noxinzelelo lokuvelisa iikhoyili eziqinileyo.Ngokubanzi, intsimbi eqengqelekayo ebandayo efana nentsimbi kunye neepleyiti zentsimbi ezinemibala kufuneka zifakwe i-anneality, ngoko ke iplastiki yazo kunye nobude nazo zilungile, kwaye zisetyenziswa kakhulu kumashishini afana neemoto, izixhobo zasekhaya kunye nehardware.
Umphezulu weshiti eliqengqelekayo linomgangatho othile wokuguda, kwaye livakala ligudile xa ulibamba, ikakhulu ngenxa yokuhlamba ngeasidi.Umphezulu ogudileyo wamacwecwe ashushu ngokuqhelekileyo awuhambelani neemfuno, ngoko ke iintambo zetsimbi ezishushu zifuna ukubanda.Obona bukhulu buncinci bemicu yentsimbi eshushu eqengqelekayo ngokuqhelekileyo yi-1.0mm, kwaye imicu yentsimbi epholileyo inokufikelela kwi-0.1mm.
Ukuqengqeleka okushushu kuqengqeleka ngaphezulu kwendawo yobushushu becrystallization, ngelixa ukuqengqeleka okubandayo kuqengqeleka ngaphantsi kweqondo lobushushu becrystallization.Utshintsho kwimilo yentsimbi ebangelwa ukuqengqeleka okubandayo kungokwakhe ukuguquguquka okubandayo okuqhubekayo, kwaye ukuqina komsebenzi obandayo okubangelwa yile nkqubo kwandisa amandla kunye nokuqina kwekhoyili eqinileyo, ngelixa ukuqina kunye nesalathiso seplastiki siyancipha.
Ukusetyenziswa kokugqibela, ukuqengqeleka okubandayo kuyawohloka ukusebenza kwesitampu kwaye iimveliso zilungele iindawo ezinokukhubazeka.
Izinto eziluncedo: Iyakwazi ukutshabalalisa isakhiwo sokuphosa i-ingots yensimbi, iphucule ubungakanani beenkozo zentsimbi, kwaye isuse iziphene kwi-microstructure, ngaloo ndlela yenza isakhiwo sentsimbi sibe lukhuni kwaye siphucule iimpawu zayo zomatshini.Olu phuculo lubonakaliswa ikakhulu kwicala lokuqengqeleka, ukwenzela ukuba intsimbi ayisekho isotropic kumlinganiselo othile;Amaqamza, iintanda, kunye nokukhululeka okwenziwa ngexesha lokugalelwa nako kunokudityaniswa phantsi kobushushu obuphezulu kunye noxinzelelo.
Ukungalungi: 1. Emva kokutshisa okutshisayo, i-non-metallic inclusions (ikakhulukazi i-sulfides kunye ne-oxides, kunye ne-silicates) ngaphakathi kwentsimbi igxininiswe kumaphepha amancinci, okubangela i-delamination.Ukumaleko kuyonakalisa kakhulu ukusebenza kwentsimbi ecaleni kobunzima, kwaye kukho ithuba lokukrazuka kwe-interlayer ngexesha le-weld shrinkage.Ubunzima bendawo obubangelwa yi-weld seam shrinkage kaninzi bufikelela amaxesha amaninzi kwi-isivuno point strain, enkulu kakhulu kunobunzima obubangelwa ngumthwalo;
2. Uxinzelelo olushiyekileyo olubangelwa kukupholisa okungalinganiyo.Ukuxinezeleka okushiyekileyo kubhekiselele kuxinzelelo oluzilinganisa ngaphakathi ngaphandle kwamandla angaphandle, kwaye lukhona kumacandelo ensimbi ashushu ashushu.Ngokuqhelekileyo, ubukhulu becandelo lentsimbi, lukhulu loxinzelelo olushiyekileyo.Nangona uxinzelelo olushiyekileyo luyi-self-equilibrium, lusenempembelelo ethile ekusebenzeni kwamacandelo ensimbi phantsi kwamandla angaphandle.Inokuba nemiphumo emibi kwi-deformation, ukuzinza, ukuxhathisa ukukhathala, kunye neminye imiba.
Ixesha lokuposa: Feb-22-2024