Nzira yekugadzira uye maitiro e-hot-rolled ribbed steel bar

Nzira yekugadzira uye maitiro e-hot-rolled ribbed steel bar

Background technique:

Mumusika wezvino rebar, hrb400e inoverengera zvimwe. Iyo microalloy kusimbisa nzira ndiyo nzira huru yekubudisa hrb400e munyika. Iyo microalloy inonyanya kuita vanadium alloy kana niobium alloy, iyo inoshandisa yakawanda alloy zviwanikwa gore rega rega. Nekuda kwekushomeka zviwanikwa zvicherwa zvine vanadium uye niobium, kupihwa kwezvinhu izvi alloying kwakasimba. Naizvozvo, kana iyo alloy yemukati yehrb400e simbi bar inogona kudzikiswa, inoburitsa hombe hupfumi uye hwemagariro mabhenefiti.

Mune tekinoroji iripo, mutsara wekugadzira wakapetwa kaviri-waya pasina kudzikisira uye saizi inotenderedza chigayo kazhinji inotora vanadium alloy kusimbisa kugadzira hrb400e, uye huwandu hwehuwandu hwevanadium i0.035% kusvika 0.045%.

Chinese patent cn104357741a inoburitsa mhando yehrb400e yakasimba-yakasimba-inodzivirira kudengenyeka kwesimbi coil uye nzira yayo yekugadzira. Kuburikidza neiyo nzira, chigadzirwa chakapedzwa chinogadzirwa nekudzikisa uye saizi yekutenderedza chigayo, icho chinogona kuve nechokwadi chekuti simbi yekupedzisa yakatenderedzwa inokungurutswa pane yakaderera tembiricha ye730 ~ 760 ℃ kuti iwane Zvezviyo zvakanakisa, iyi nzira haina kukodzera mitsara yekugadzira. pasina kuderedza saizi mills. Chinese patent cn110184516a inoburitsa nzira yekugadzirira yewaya yakakwirira φ6mm~hrb400e coiled screw. Nekubatsirwa kwesimba rakasimba rekukunguruka kwemidziyo, kuderera kwekushisa kutenderera kunotanga kubva kune tembiricha yekudziya, uye kugadzirwa pasina microalloying kunoitika. Kuipa kweiyi nzira ndeyekuti Izvo zvinodikanwa zvesimba uye kuita kwemotokari yeyakaomarara uye yepakati yekutenderedza midziyo yakakwira zvakanyanya, kunyanya kune mutsara wekugadzira we torsion rolling, iyo inoderedza hupenyu hwekuyedza hwemidziyo uye inowedzera mutengo wekugadzirisa we. midziyo, uye kusimba kwegoho repamusoro waya φ6mm~hrb400e coil inogadzirwa nenzira iyi inosara. Huwandu husina kukwana, zvakaoma kuvimbisa mwero wekuita.

Tekinoroji yekushandisa zvinhu:

Chigadzirwa chazvino chine chinangwa chekupa nzira yekugadzira inopisa-yakakungurutswa ribbed simbi simbi, kunyanya nzira yekugadzira inopisa-yakakungurutswa hozhwa dzepamusoro waya φ8~φ10mm~hrb400e, iyo inokunda kushomeka kwataurwa pamusoro kwehunyanzvi hwekutanga uye kuderedza kugadzirwa. mari.

Technical scheme yezvino kugadzirwa:

Iyo nzira yekugadzira inopisa-yakakungurutswa ribbed simbi simbi, iyo yakatarwa ye ribbed simbi waya tsvimbo ndeye φ8~φ10mm, uye tekinoroji maitiro anosanganisira kudziyisa - billeting - rough rolling - medium rolling - kutonhora - pre-finishing - kutonhora - kupedza - kutonhora - kutenderera - Air-yakatonhorera roller tafura-coil kuunganidza-inononoka kutonhora; chemikemikari yakakura muzana yesimbi ndeye 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%, vamwe vose ndiFe uye zvinhu zvisingadzivisiki zvetsvina; Matanho akakosha ekuita anosanganisira: tembiricha yechoto i1070 ~ 1130 ℃, tembiricha yekumisikidza iri 970 ~ 1000 ℃, uye tembiricha yekupedzisa ndeye 840 ~ 1000 ℃. 880℃; kuisa tembiricha 845 ~ 875 ℃; yekupedzisira yekutenderera tembiricha iri pazasi recrystallization tembiricha yeaustenite zone; kukurumidza kutonhora ne fan pamhepo-yakatonhorera roller tafura, mhepo yemhepo i100%; Iyo tembiricha yevhavha ndeye 640 ~ 660 ℃, tembiricha yevhavha yekuchengetedza kupisa ndeye 600 ~ 620 ℃, uye nguva iri muchivharo chekuchengetedza kupisa ndeye 45 ~ 55s.

Nheyo yekugadzirwa kwayo: mune tembiricha ye840-880 ℃, iwo austenite tsanga dzakarebeswa nekukunguruka deformation, asi recrystallization haiitike. Nekudaro, mabhendi edeformation anogadzirwa muzviyo zve austenite, uye migumo yemabhendi ekuchinja kazhinji iri pamiganho yezviyo, uye kune zvakare mabhendi ekuchinja muzviyo semiganhu yezviyo inooneka kugovera tsanga dzakareba austenite. Munguva yeshanduko kubva ku austenite kuenda kune ferrite, ese ari maviri elongated austenite miganhu yezviyo uye inoratidzika yezviyo muganhu deformation zone inoita senge nucleation nzvimbo dzeferrite, zvichikonzera kunatswa kweferrite mushure mekushandurwa. Tembiricha yakaderera ichikunguruka muguyo yekupedzisa inoderedza kutenderedzwa kweiyo roughing uye yepakati inotenderedza mill uye pre-ekupedzisira mill uye inowedzera hupenyu hwebasa remidziyo.

Migumisiro inobatsira yekugadzirwa kwayo ndeyotevera: nekuwedzera chidimbu chev chekusimbisa microalloy, simba regoho rinovandudzwa, v uye c inoumba carbides, iyo inonaya panguva yekutonhora mushure mekukunguruka, uye inotamba basa rekusimbisa kwemvura. . Iyo inopisa-yakaputirwa tsvimbo yetambo yezvakagadzirwa ine simba rekusimba re 600-700mpa, simba regoho re 420-500mpa, chiyero chegoho simba rinenge 450mpa, uye agt> 10%, iyo inovimbisa kukwana kwakakwana. Iko simba regoho rakagadzikana, uye chiyero chekudzidzira chiri pamusoro pe99%. Iyo yakagadzirwa nehunyanzvi inogadzirisa dambudziko rekuti twist rolling mill inonetsa kuita yakaderera-tembiricha kukungurutsira, inoderedza mutengo wekuona kuti huwandu hwekugadzira haudzikisike, uye hunounza hupfumi hwepamusoro.

Detailed nzira

Izvo zviri mukati mekugadzirwa kwemazuva ano zvinotsanangurwa zvakare pasi apa pamwe chete ne embodiments.

Nzira yekugadzira yeboka repamusoro waya φ8mm~φ10mmhrb400e hozhwa dzakakoswa. The rolling maitiro ndeiyi: inobuda tembiricha: 1080 ~ 1120 ℃, kupinda pre-kupedzisa rolling 1030 ~ 1060 ℃, kupinda kupedza rolling tembiricha: 850 ~ 870 ℃, kutenderera tembiricha: 850 ~ 870 ℃, fan mhepo vhoriyamu 100%, kupinda insulation chivharo tembiricha 640 ~ 660 ℃, 600 ~ 620 ℃ kunze kwechivharo chekuchengetedza kupisa, nguva iri muchivharo chekuchengetedza kupisa ndeye 45 ~ 55s, uye inotonhora zvega. Mushonga wemakemikari wemudonzvo wewaya wekuenzanisira kwechigadzirwa chiripo chinoratidzwa muTebhurari 1, uye maitiro emagetsi emudonzvo wewaya wekuenzanisira kwechigadzirwa chiripo chinoratidzwa muTable 2.

Kemikari yakagadzirwa (wt%) yewaya tsvimbo yemuenzaniso wetafura

Tafura 2 Mechanical properties yemuenzaniso tambo dzewaya

Kusimba kwegoho retambo yakakwirira φ8mm ~ φ10mmhrb400e hozhwa dzakaputirwa dzakagadzirwa nenzira yekugadzira iri muhuwandu hwe420 ~ 500mpa, iyo agt iri pamusoro pe10%, simba regoho rinopfuura 1.35, uye metallographic chimiro chinonyanya ferrite. uye pearlite. , kuita kwakagadzikana, simba regoho rakakwana uye agt margin, budiriro yeiyi nzira yakakosha zvikuru kudzikisa mitengo yekugadzira uye kuwedzera purofiti kune mbiri-mitsetse torsion rolling mitsara yekugadzira ine midziyo yechinyakare.

Technical Features:
1. Nzira yekugadzira yesimbi yakanyungudutswa yakanyungudutswa yesimbi, iyo tambo yetambo yakatarwa ndeye φ8mm~φ10mm, uye nzira yetekinoroji inosanganisira kupisa - billeting - rough rolling - medium rolling - kutonhora - pre-finishing - kutonhora - kupedza - kutonhora - kutenderera. - mhepo Cold roller tafura-kuunganidza coil-inononoka kutonhora, inoratidzwa mune izvozvo: iyo kemikari yakagadzirwa yakawanda muzana yesimbi ndeye 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%, mamwe ose ari fe uye zvisingadzivisiki zvisina kuchena zvinhu; matanho anokosha ekuita anosanganisira: tembiricha yekubata iri 1070 ~ 1130 ° C, tembiricha isati yapera ndeye 970 ~ 1000 ° C, uye kupenengura kunoitwa. Tembiricha ndeye 840 ~ 880 ℃; tembiricha yekutenderera i845 ~ 875 ℃; tembiricha yekupedzisira yekutenderera iri pazasi recrystallization tembiricha yeaustenite zone; inokurumidza kunyoroveswa ne fan pamhepo-yakatonhorera roller tafura, uye huwandu hwemhepo huri 100%; iyo roller tafura inoiswa insulated nekuvhara chivharo chekuvhara, tembiricha yekupinda muvharo yekuvhara ndeye 640 ~ 660 ℃, uye tembiricha yekubuda muvharo yekuvharisa ndeye 600 ~ 620 ℃, uye nguva iri muchivharo chekuvhara ndeye 45 ~ 55s.

Muchidimbu chehunyanzvi
Iyo nzira yekugadzira yekupisa-yakakungurutswa ribbed simbi simbi, chitubu simbi inopisa-yakakungurutswa waya tsvimbo yakatarwa ndeye Φ8mm~Φ10mm, iyo kemikari inoumbwa hukuru muzana yemukati yesimbi iC = 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%, mamwe ose ari Fe uye zvisingadzivisiki zvetsvina; iyo yekutenderedza maitiro ndeye: tembiricha yevira ndeye 1070 ~ 1130 ℃, uye kusati kwapera kunoitwa. Iyo tembiricha yekutenderera ndeye 970 ~ 1000 ℃, iyo yekupedzisa kutenderera tembiricha ndeye 840 ~ 880 ℃; tembiricha yekutenderera i845 ~ 875 ℃; tembiricha yekupedzisira yekutenderera iri pazasi recrystallization tembiricha yedunhu reaustenite; %; Mushure mekuvhara chivharo chekuvhara chevhavha, tembiricha yekupinda muvharo yekuvhara ndeye 640 ~ 660 ℃, uye tembiricha yekubuda muvharo yekuvhara ndeye 600 ~ 620 ℃, uye nguva muvharo yekuvhara ndeye 45 ~ 55s. Nekuwedzera zvishoma zveV alloy uye kupedzisa kupeta pakupisa kwakadzika, kugadzirwa hakungogadziri kushanda kwakasimba kwemidziyo, asiwo kunoderedza alloy content uye mari.