Imbali yemiqulu

Roll ezahlukeneyo kunye nenkqubo yokuvelisa kunye nenkqubela phambili yetekhnoloji ye-metallurgical kunye nokuvela kwezixhobo zentsimbi kunye nophuhliso oluqhubekayo.Embindini wenkulungwane ye-18, iBritani yaba nobuchule kubugcisa bokuvelisa imiqulu yentsimbi epholileyo yokuqengqeleka iipleyiti zentsimbi, yaye kwisiqingatha sesibini senkulungwane ye-19, inkqubela yobuchwephesha bokwenza intsimbi yaseYurophu yafuna ukuqengqeleka kweetoni ezinkulu zeetoni. kwaye ukomelela kwentsimbi engwevu okanye imiqulu yentsimbi epholileyo ayikwazanga ukuhlangabezana neemfuno.Umxholo wekhabhoni we-0.4% ukuya kwi-0.6% yentsimbi yentsimbi eqhelekileyo yazalwa ngokufanelekileyo.Ukuvela kwezixhobo ezinzima zokubumba ukuze kuphuculwe ngakumbi ukuqina kwemiqulu eyenziwe yale ngqungquthela.ukusetyenziswa kwezinto ezixutywayo kunye nokuqaliswa kwonyango lobushushu ekuqaleni kwenkulungwane yama-20 kuphucule kakhulu ukuxhathisa ukunxiba kunye nokuqina kwentsimbi kunye nemiqulu eshushu yentsimbi kunye nemiqulu ebandayo.Ukongezwa kwe-molybdenum ukuphosa i-iron rolls kwiphepha elishushu eliqengqelekayo kunye ne-strip liphucule umgangatho wezinto eziqengqelekayo.Ukugalelwa okudibeneyo ngendlela yokugungxulwa kuphucula kakhulu amandla angundoqo we-cast rolls.

Ukuqengqeleka kwinani elikhulu lezinto zokudibanisa kusemva kweMfazwe yesibini yeHlabathi, esisisiphumo sezixhobo zokuqengqeleka ukuya kwinqanaba elikhulu, eliqhubekayo, elinesantya esiphezulu, uphuhliso oluzenzekelayo, kunye namandla ezinto eziqengqelekayo, ukuxhathisa deformation ukunyusa ukusebenza roll. iimfuno.Ngeli xesha, i-semi-steel rolls kunye ne-ductile iron rolls yavela, kunye nomguboimiqulu ye-tungsten carbidezaphuhliswa ngempumelelo emva kweminyaka yoo-1960.Itekhnoloji yokuphosa i-centrifugal kunye nethekhnoloji yonyango lobushushu obuhlukeneyo bemiqulu yakhuthazwa ngokubanzi eJapan naseYurophu ekuqaleni kweminyaka yoo-1970, eyaphucula kakhulu ukusebenza kwayo yonke imiqulu yemiqulu.Imiqulu yentsimbi edityanisiweyo ephezulu yechromium nayo isetyenziswe ngempumelelo kumatshini wokusila oshushu.Kwangelo xesha linye, eJapan kwasetyenziswa intsimbi emhlophe kunye nesemi-steel rolls.I-80s yaseYurophu kunye nokuqaliswa kweentsimbi eziphezulu ze-chromium kunye ne-ultra-deep hardened layer of cold rolls kunye ne-alloy cast iron rolls ekhethekileyo kumacandelo amancinci kunye nokugqiba intonga.Ukuphuhliswa kweteknoloji yentsimbi yangoku kuye kwakhokelela ekuphuhlisweni kwemiqulu ephezulu yokusebenza.Ukusetyenziswa kwe-centrifugal casting kunye neendlela ezintsha ezidibeneyo ezifana ne-continuous casting composite method (indlela ye-CPC), indlela ye-jet deposition (indlela ye-Osprey), indlela ye-electroslag welding kunye ne-isostatic eshushu yokucinezela indlela yokuvelisa i-core of good toughness of forged steel or ductile iron, umaleko wangaphandle woluhlu lwesinyithi olunesantya esiphezulu semiqulu edityanisiweyo kunye nemiqulu yesinyithi yeceramic isetyenzisiwe eYurophu, eJapan, isizukulwana esitsha seprofayili, intonga yocingo, amatye okusila.

I-China yaqala ukuvelisa i-casting rolls kwiibhetshi ukusuka kwi-1930s, kodwa kwakukho iintlobo ezimbalwa kakhulu.ingcali yokuqalatungsten carbide rollisityalo yasekwa Xingtai, Hebei ekupheleni 1950s.ngo 1958, Anshan Iron kunye Steel Inkampani wenza ulingo lokuqala ngamazwe kwaye wasebenzisa rolls intsimbi ductile enkulu 1050 primary rolling.ngeminyaka yoo-1960, imiqulu ebandayo kunye nemiqulu emikhulu yentsimbi eyenziweyo yenziwa ngempumelelo.ngasekupheleni kweminyaka yoo-1970, iTaiyuan Iron kunye neNkampani yeNsimbi kwaye ngasekupheleni kweminyaka yama-70, iTaiyuan Iron kunye neNkampani yeNsimbi kunye neBeijing Iron kunye neZiko loPhando leNsimbi ngokudibeneyo bavelisa iiroli zentsimbi ze-centrifugal ze-coil rolling mill kunye neyunithi yokuqengqeleka yentsimbi eshushu eqhubekayo, kunye Xingtai Metallurgical Machinery Roll Co. kunye nezinye iintlobo ezintsha.Ngeminyaka yoo-1990, imveliso yaseTshayina iye yahlangabezana neemfuno zasekhaya kwaye ngokuyinxenye yathunyelwa kumazwe angaphandle, kodwa iindidi kufuneka zandiswe kwaye umgangatho kufuneka uphuculwe.