Indlela yokuvelisa kunye nenkqubo ye-ribbed steel bar eshushu

Indlela yokuvelisa kunye nenkqubo ye-ribbed steel bar eshushu

Ubuchule bokungasemva:

Kwimakethi ye-rebar yangoku, i-hrb400e ibala ngaphezulu. Indlela yokuqinisa i-microalloy yindlela ephambili yokuvelisa i-hrb400e kwihlabathi. I-microalloy ikakhulu i-vanadium alloy okanye i-niobium alloy, edla izixhobo ezininzi ze-alloy minyaka yonke. Ngenxa yokunqongophala kwemithombo yezimbiwa equlethe i-vanadium kunye ne-niobium, ukunikezelwa kwezi zinto zokudibanisa kuqinile. Ngoko ke, ukuba umxholo we-alloy we-hrb400e yentsimbi yentsimbi ungancitshiswa, uya kuvelisa inzuzo enkulu yezoqoqosho nezentlalo.

Kubuchwephesha obukhoyo, umgca wokuvelisa owenziwe ngocingo oluphindwe kabini ngaphandle kokunciphisa kunye nokulinganisa ilitye lokusila ngokuqhelekileyo lithatha i-vanadium alloy yokuqiniswa ukuvelisa i-hrb400e, kwaye umthamo wepesenti ye-vanadium yi-0.035% ukuya kwi-0.045%.

I-patent yaseTshayina i-cn104357741a idiza uhlobo lwe-hrb400e yokuqina kwentsimbi yentsimbi yokumelana nenyikima kunye nendlela yokuvelisa. Ngendlela, imveliso egqityiweyo iveliswa ngokunciphisa kunye nokulinganisa i-rolling mill, enokuqinisekisa ukuba intsimbi yokugqiba iqengqeleka kwiqondo lokushisa eliphantsi le-730 ~ 760 ℃ ukufumana Iinkozo ezicolekileyo, le ndlela ayifanelekanga kwimigca yokuvelisa. ngaphandle kokunciphisa iisiling Mills. Patent yaseTshayina i-cn110184516a ichaza indlela yokulungiselela ucingo oluphezulu φ6mm~hrb400e isikrufu esijiyileyo. Ngoncedo lwamandla anamandla okuqengqeleka kwesixhobo, ukuqengqeleka kobushushu obuphantsi buqala ukusuka kubushushu bobushushu, kwaye imveliso ngaphandle kwe-microalloying iyenzeka. Ukungalungi kwale ndlela kukuba Iimfuno zamandla kunye nokusebenza kweemoto zezixhobo ezirhabaxa kunye neziphakathi ziphezulu kakhulu, ngakumbi kumgca wemveliso we-torsion rolling, okunciphisa ubomi bokulinga besixhobo kunye nokwandisa iindleko zokugcinwa kwesixhobo. izixhobo, kunye namandla isivuno ngocingo eliphezulu φ6mm~hrb400e coil eveliswe le ndlela yi surplus. Ubungakanani obungonelanga, kunzima ukuqinisekisa izinga lokufaneleka kwentsebenzo.

Imiba yophumezo lobuchwephesha:

Ukuveliswa kwangoku kujolise ekuboneleleni indlela yokuvelisa imivalo yentsimbi eshushu, ngokukodwa indlela yokuvelisa i-hot-rolled coiled coiled for high φ8~φ10mm~hrb400e, eyoyisa ukusilela okukhankanywe ngasentla kobugcisa bangaphambili kunye nokunciphisa imveliso. iindleko.

Iskimu sobugcisa soyilo lwangoku:

Indlela yokuvelisa i-hot-rolled ribbed steel bar, ukucaciswa kwentonga yentsimbi ye-ribbed φ8 ~ φ10mm, kunye nenkqubo yezobuchwepheshe ibandakanya ukufudumeza - i-billeting - i-rough rolling - medium rolling - cooling - pre-finishing - cooling - finishing - cooling - ukujikeleza - Itafile ye-roller epholileyo yomoya-ingqokelela yekhoyili-ukupholisa okucothayo; ipesenti yokwakheka kweekhemikhali ubukhulu bentsimbi yi-c=0.20%~0.25%, si=0.40%~0.50%, mn=1.40%~1.60%, p≤0.045%, s ≤0.045%, v=0.015% ~0.020%, ezinye ziyi-Fe kunye nezinto ezingenakuthintelwa zokungcola; Amanyathelo enkqubo engundoqo abandakanya: iqondo lobushushu eziko yi 1070 ~ 1130 ℃, iqondo prefinishing rolling yi 970 ~ 1000 ℃, kwaye iqondo lokugqiba rolling yi 840 ~ 1000 ℃. 880℃; iqondo lokushisa 845 ~ 875 ℃; iqondo lobushushu bokugqibela lingaphantsi kobushushu bokubuyisela kwakhona kwindawo ye-austenite; ukupholisa ngokukhawuleza nge-fan kwitafile ye-roller epholileyo emoyeni, umthamo womoya ngu-100%; Ubushushu bekhava yi-640 ~ 660 ℃, iqondo lokushisa lobushushu bokugcina ubushushu liyi-600 ~ 620 ℃, kwaye ixesha kwi-inshurensi yokugcina ubushushu yi-45 ~ 55s.

Umgaqo-siseko wokuqanjwa: kwiqondo lokushisa le-840-880 ℃, i-grains ye-austenite yandiswa yi-rolling deformation, kodwa i-recrystallization ayenzeki. Nangona kunjalo, iibhendi zedeformation ziveliswa kwiinkozo ze-austenite, kwaye iziphelo zeebhendi ze-deformation zihlala zikwimida eziziinkozo, kwaye kukwakho namabhanti oguquko kwiinkozo njengemida ecacileyo yeenkozo ukwahlula iinkozo ze-austenite ezinde. Ngexesha lenguqu ukusuka kwi-austenite ukuya kwi-ferrite, yomibini imida emide ye-austenite yokutya kunye nomda obonakalayo wokuguqula umda wengqolowa usebenza njengeendawo ze-nucleation ze-ferrite, ezikhokelela ekucokiseni i-ferrite emva kwenguqu. Ukushisa okuphantsi kweqondo lokushisa kwi-mill yokugqiba kunciphisa umthwalo ojikelezayo we-roughing kunye ne-intermediate rolling mill kunye ne-pre-finishing mills kunye nokwandisa ubomi benkonzo yezixhobo.

Imiphumo emihle yokuveliswa kwayo yile ndlela ilandelayo: ngokongeza inani elincinci le-v yokuqinisa i-microalloy, amandla okuvelisa aphuculwe, i-v kunye ne-c form carbides, ehlanjululwa ngexesha lokupholisa emva kokuqengqeleka, kwaye idlala indima yokuqinisa imvula. . Intonga yocingo olushushu oluyi-invention lunamandla angama-600-700mpa, amandla okuvelisa i-420-500mpa, amandla omlinganiselo wesivuno malunga ne-450mpa, kunye ne-agt> 10%, eqinisekisa umda owaneleyo. Amandla esivuno azinzile, kwaye izinga lokufaneleka kwentsebenzo lingaphezulu kwama-99%. Ukuveliswa kobuchule kusombulula ingxaki yokuba i-twist rolling mill kunzima ukwenza i-low-temperature rolling, inciphisa iindleko kwisiseko sokuqinisekisa ukuba umthamo wemveliso awuncitshiswa, kwaye izisa iinzuzo eziphezulu zoqoqosho.

Iindlela ezineenkcukacha

Umxholo woyilo lwangoku uchazwe ngakumbi apha ngezantsi ngokubambisana ne-embodiments.

Indlela yokuvelisa yeqela locingo oluphezulu φ8mm~φ10mmhrb400e iinkumba ezihlanganisiweyo. Inkqubo yokuqengqeleka yile: iqondo lobushushu eliphumayo: 1080 ~ 1120 ℃, ukungena pre-ukugqiba rolling 1030 ~ 1060 ℃, ukungena ukugqiba ubushushu rolling: 850 ~ 870 ℃, iqondo lobushushu elijikelezayo: 850 ~ 870 ℃, fan umoya umthamo 100%, ingena inshorensi cover. iqondo lobushushu 640 ~ 660℃, 600 ~ 620℃ ngaphandle kwesigqubuthelo sokugcina ubushushu, ixesha kwisigqubuthelo sokugcina ubushushu yi 45~55s, kwaye iphola ngokwemvelo. Ukubunjwa kweekhemikhali zentonga yocingo lokubonakaliswa kwezinto ezikhoyo ngoku kuboniswe kwiThebhile 1, kunye neempawu zomatshini zentonga yocingo lokubonakaliswa kwezinto ezikhoyo ziboniswe kwiThebhile 2.

Ukwakhiwa kweekhemikhali (wt%) yentonga yocingo yomzekelo wetafile

Itheyibhile 2 Iipropati zobuchwephesha bomzekelo weentsimbi zocingo

Amandla esivuno socingo oluphezulu φ8mm~φ10mmhrb400e iinkumba ezijijekileyo eziveliswe yindlela yokuyilwa kuluhlu lwe-420 ~ 500mpa, i-agt ingaphezulu kwe-10%, umlinganiselo wesivuno samandla ungaphezulu kwe-1.35, kunye nesakhiwo se-metallographic ubukhulu becala ferrite. kunye nepearlite. , ukusebenza okuzinzileyo, ukomelela kwesivuno okwaneleyo kunye nomda we-agt, impumelelo yale nkqubo ibaluleke kakhulu ekunciphiseni iindleko zemveliso kunye nokunyusa ingeniso yemigca yemveliso eqengqelekayo yemigca emibini enezixhobo ezindala.

Iimpawu zobuGcisa:
1. Indlela yokuvelisa i-hot-rolled ribbed steel bar, inkcazo yentonga yocingo yi-φ8mm~φ10mm, kunye nenkqubo yezobuchwepheshe ibandakanya ukufudumeza - i-billeting - i-rough rolling - medium rolling - cooling - pre-finishing - cooling - finishing - cooling - spinning – umoya Itheyibhile ye-Cold roller-ukuqokelela i-coil-ukupholisa okucothayo, okubonakaliswe kuloo nto: ipesenti yokwakheka kweekhemikhali yobunzima bentsimbi c = 0.20% ~ 0.25%, si = 0.40% ~ 0.50%, mn = 1.40% ~ 1.60%, p≤ 0.045 %, s≤0.045%, v=0.015%~0.020%, ezinye zife kunye nezinto ezingenakuthintelwa zokungcola; amanyathelo enkqubo ephambili abandakanya: ukushisa okuthephayo ngu-1070 ~ 1130 ° C, ukushisa kwangaphambili kokugqiba yi-970 ~ 1000 ° C, kwaye ukugqiba ukugqiba kwenziwa. Ubushushu ngu 840~880℃; iqondo lobushushu lokujikeleza yi-845 ~ 875℃; iqondo lobushushu bokugqibela lingaphantsi kobushushu be-recrystallization yendawo ye-austenite; ipholiswe ngokukhawuleza yi-fan kwitafile ye-roller epholileyo emoyeni, kwaye umthamo womoya ngu-100%; itheyibhile ye-roller ifakwe ngokuvala i-insulation cover, ubushushu bokungena kwi-insulation cover yi-640 ~ 660 ℃, kunye nobushushu bokuphuma kwi-insulation cover yi-600 ~ 620 ℃, kwaye ixesha kwi-insulation cover yi-45 ~ 55s.

Isishwankathelo sobugcisa
Indlela yokuvelisa intsimbi yentsimbi eshushu eqengqelekayo, intsimbi yentsimbi eshushu-eqengqelekayo ingcaciso yentonga yi-Φ8mm~Φ10mm, ipesenti yokwakheka kweekhemikhali ipesenti yomxholo wentsimbi yiC = 0.20% ~ 0.25%, Si = 0.40% ~ 0.50% , Mn = 1.40% ~ 1.60%, P≤0.045%, S≤0.045%, V=0.015% ~ 0.020%, ezinye ziyi-Fe kunye nezinto ezingenakuthintelwa zokungcola; inkqubo yokuqengqeleka yile: ubushushu bomlilo bomlilo ngu-1070 ~ 1130 ℃, kwaye ukugqitywa kwangaphambili kuqhutywe. Ubushushu obuqengqelekayo yi-970 ~ 1000℃, ubushushu bokugqiba yi-840 ~ 880℃; iqondo lobushushu lokujikeleza yi-845 ~ 875℃; ubushushu bokugqibela obuqengqelekayo bungaphantsi kobushushu be-recrystallization bommandla we-austenite; % Emva kokuvala i-insulation cover ye-roller, ubushushu bokungena kwi-insulation cover yi-640 ~ 660 ℃, kwaye ubushushu bokuphuma kwi-insulation cover yi-600 ~ 620 ℃, kwaye ixesha kwi-insulation cover yi-45 ~ 55s. Ngokudibanisa inani elincinci le-V alloy kunye nokugqiba ukuqengqeleka kwiqondo lokushisa eliphantsi, ukuveliswa akuqinisekisi kuphela ukusebenza okuzinzile kwezixhobo, kodwa kunciphisa umxholo we-alloy kunye neendleko.