Txoj kev tsim khoom thiab txheej txheem ntawm kub dov ribbed steel bar

Txoj kev tsim khoom thiab txheej txheem ntawm kub dov ribbed steel bar

Cov txheej txheem hauv qab:

Hauv kev lag luam rebar tam sim no, hrb400e tso nyiaj ntau dua. Cov txheej txheem microalloy ntxiv dag zog yog txoj hauv kev tseem ceeb los tsim hrb400e hauv ntiaj teb. Lub microalloy feem ntau yog vanadium alloy lossis niobium alloy, uas siv ntau cov khoom siv hlau txhua xyoo. Vim muaj cov peev txheej ntxhia tsawg uas muaj vanadium thiab niobium, cov khoom siv ntawm cov hlau alloying yog nruj. Yog li ntawd, yog tias cov ntsiab lus alloy ntawm hrb400e steel bar tuaj yeem txo qis, nws yuav ua rau muaj txiaj ntsig zoo rau kev lag luam thiab kev sib raug zoo.

Nyob rau hauv cov cuab yeej uas twb muaj lawm, ob-xaim dov ntau lawm kab tsis txo thiab sizing dov zeb feem ntau txais yuav vanadium alloy ntxiv dag zog rau tsim hrb400e, thiab cov loj feem pua ​​ntawm vanadium yog 0.035% rau 0.045%.

Suav patent cn104357741a nthuav tawm ib hom hrb400e siab-lub zog av qeeg-resistant steel kauj thiab nws txoj kev tsim khoom. Los ntawm txoj kev, cov khoom tiav yog tsim los ntawm kev txo qis thiab sizing dov zeb, uas tuaj yeem xyuas kom meej tias cov hlau ua tiav yog dov ntawm qhov kub ntawm 730 ~ 760 ℃ kom tau txais cov nplej zoo, cov qauv no tsis haum rau cov kab ntau lawm. tsis txo qhov luaj li cas mills. Suav patent cn110184516a nthuav tawm txoj kev npaj ntawm high hlau φ6mm ~ hrb400e coiled ntsia hlau. Nrog kev pab los ntawm lub zog dov lub peev xwm ntawm cov cuab yeej, qhov kub tsis tshua muaj dov pib los ntawm cov cua kub kub, thiab cov khoom tsis muaj microalloying yog pom tau. Qhov tsis zoo ntawm txoj kev no yog qhov yuav tsum tau ua rau lub zog thiab lub cev muaj zog ua haujlwm ntawm cov khoom siv ntxhib thiab nruab nrab dov yog qhov siab, tshwj xeeb tshaj yog rau cov kab ntau lawm ntawm torsion dov, uas txo cov kev sim lub neej ntawm cov cuab yeej thiab nce tus nqi ntawm cov khoom siv. cov cuab yeej siv, thiab lub zog tawm los ntawm cov xaim siab φ6mm ~ hrb400e coil uas ua los ntawm cov qauv no yog cov khoom seem. Tsis txaus kom muaj nuj nqis, nws yog qhov nyuaj los lav qhov kev tsim nyog tus nqi.

Kev siv cov ntsiab lus:

Tam sim no invention aims muab ib txoj kev los ua kub-kuav los tiag ribbed steel tuav, tshwj xeeb tshaj yog ib txoj kev los ua kub dov coiled snails rau high hlau φ8 ~ φ10mm ~ hrb400e, uas overcomes lub saum toj no-hais tsis txaus ntawm cov kos duab ua ntej thiab txo ntau lawm. tus nqi.

Technical scheme ntawm lub invention tam sim no:

Cov txheej txheem ntawm cov khoom siv kub-dov ribbed steel bar, qhov tshwj xeeb ntawm ribbed steel hlau pas nrig yog φ8 ~ φ10mm, thiab cov txheej txheem thev naus laus zis suav nrog cua sov - billeting - ntxhib dov - nruab nrab dov - txias - ua ntej tiav - txias - tiav - txias - spinning - Cua txias rau cov menyuam rooj - coil sau - qeeb txias; Cov tshuaj muaj pes tsawg leeg ntawm cov hlau yog 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%, tus so yog Fe thiab unavoidable impurity ntsiab; Cov txheej txheem tseem ceeb muaj xws li: qhov cub kub kub yog 1070 ~ 1130 ℃, qhov kub ua ntej dov yog 970 ~ 1000 ℃, thiab qhov ua tiav qhov kub yog 840 ~ 1000 ℃. 880 ℃; tso kub 845 ~ 875 ℃; Qhov kawg dov kub yog qis dua qhov kub ntawm recrystallization ntawm austenite cheeb tsam; ceev cua txias los ntawm kiv cua ntawm cua txias rau cov menyuam rooj, cua ntim yog 100%; Qhov kub ntawm lub hau npog yog 640 ~ 660 ℃, qhov kub ntawm lub hau npog yog 600 ~ 620 ℃, thiab lub sij hawm nyob rau hauv lub tshav kub preservation npog yog 45 ~ 55s.

Lub hauv paus ntsiab lus ntawm kev tsim khoom: nyob rau hauv qhov kub ntawm 840-880 ℃, cov nplej austenite yog elongated los ntawm dov deformation, tab sis recrystallization tsis tshwm sim. Txawm li cas los xij, deformation bands yog tsim nyob rau hauv cov nplej austenite, thiab qhov kawg ntawm cov deformation bands feem ntau yog nyob rau ntawm cov ciam teb, thiab tseem muaj deformation bands nyob rau hauv cov nplej raws li pom meej ciam teb los faib cov elongated austenite nplej. Thaum lub sij hawm hloov pauv ntawm austenite mus rau ferrite, ob qho tib si elongated austenite lis ciam teb thiab thaj tsam pom meej ntawm thaj tsam deformation ua raws li qhov chaw nucleation rau ferrite, ua rau kev ua kom zoo ntawm ferrite tom qab hloov. Tsis tshua muaj kub dov nyob rau hauv lub finishing zeb txo cov dov load ntawm roughing thiab intermediate dov mills thiab pre-finishing mills thiab ua rau kom lub neej kev pab cuam ntawm cov khoom.

Cov txiaj ntsig zoo ntawm kev tsim khoom yog raws li hauv qab no: los ntawm kev ntxiv me me ntawm v rau microalloy ntxiv dag zog, cov txiaj ntsig tau zoo dua qub, v thiab c daim ntawv carbides, uas yog precipitated thaum lub sij hawm txias txias tom qab dov, thiab ua lub luag haujlwm ntawm nag lossis daus. . Qhov kub-dov hlau pas nrig ntawm qhov kev tsim khoom muaj lub zog tensile ntawm 600-700mpa, lub zog tawm los ntawm 420-500mpa, qhov nruab nrab yield zog ntawm txog 450mpa, thiab agt> 10%, uas ua kom cov npoo txaus. Lub zog tawm los yog ruaj khov, thiab qhov kev tsim nyog tau txais txiaj ntsig yog siab dua 99%. Lub invention technically daws qhov teeb meem uas lub twist dov zeb yog ib qho nyuaj rau ua tsis tshua muaj kub dov, txo tus nqi ntawm lub hauv paus ntawm kom ntseeg tau tias lub peev xwm ntau lawm yog tsis txo, thiab coj cov nyiaj txiag kev pab ntau dua.

Cov kev nthuav dav

Cov ntsiab lus ntawm qhov kev tsim kho tam sim no tau piav qhia ntxiv hauv qab no ua ke nrog cov embodiments.

Cov txheej txheem ntau lawm ntawm ib pab pawg neeg siab hlau φ8mm ~ φ10mmhrb400e coiled qwj. Cov txheej txheem dov yog: qhov kub thiab txias: 1080 ~ 1120 ℃, nkag mus ua ntej ua tiav dov 1030 ~ 1060 ℃, nkag mus rau qhov kawg dov kub: 850 ~ 870 ℃, spinning kub: 850 ~ 870 ℃, kiv cua ntim 100%, nkag rau rwb thaiv tsev kub 640 ~ 660 ℃, 600 ~ 620 ℃ tawm ntawm lub tshav kub preservation npog, lub sij hawm nyob rau hauv lub tshav kub preservation npog yog 45 ~ 55s, thiab nws txias lawm. Cov tshuaj muaj pes tsawg leeg ntawm cov hlau pas nrig ntawm lub embodiment ntawm qhov tam sim no invention yog qhia nyob rau hauv Table 1, thiab txhua yam khoom ntawm hlau pas nrig ntawm lub embodiment ntawm lub invention tam sim no muaj nyob rau hauv daim duab 2.

Tshuaj muaj pes tsawg leeg (wt%) ntawm cov hlau pas nrig ntawm lub rooj piv txwv

Table 2 Mechanical properties of piv txwv hlau rods

Lub zog tawm los ntawm cov xaim siab φ8mm ~ φ10mmhrb400e coiled qwj tsim los ntawm txoj kev tsim khoom yog nyob rau hauv thaj tsam ntawm 420 ~ 500mpa, agt yog siab dua 10%, lub zog tawm los piv yog siab dua 1.35, thiab cov qauv metallographic feem ntau yog ferrite. thiab pearlite. , ruaj khov kev ua tau zoo, muaj zog tawm los txaus thiab agt margin, kev ua tiav ntawm cov txheej txheem no yog qhov tseem ceeb ntawm kev txo cov nqi tsim khoom thiab nce cov txiaj ntsig rau dual-line torsion dov cov kab ntau lawm nrog cov cuab yeej qub.

Technical nta:
1. Cov txheej txheem ntau lawm ntawm kub dov ribbed steel bar, hlau pas nrig specification yog φ8mm ~ φ10mm, thiab cov txheej txheem thev naus laus zis muaj xws li cua sov - billeting - ntxhib dov - nruab nrab dov - txias - ua ntej tiav - txias - xov - txias - spinning - Cua Txias Cov Menyuam Lub Rooj-Sau coil-Slow Cooling, characterized in that: cov tshuaj muaj pes tsawg leeg feem pua ​​ntawm cov hlau yog 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%, tus so yog fe thiab unavoidable impurity ntsiab; Cov txheej txheem tseem ceeb muaj xws li: qhov kub thiab txias yog 1070 ~ 1130 ° C, qhov kub ua ntej ua tiav yog 970 ~ 1000 ° C, thiab kev ua tiav tiav. Qhov kub yog 840 ~ 880 ℃; spinning kub yog 845 ~ 875 ℃; qhov kawg dov kub yog qis dua qhov kub ntawm recrystallization ntawm thaj chaw austenite; nws yog txias txias los ntawm tus kiv cua ntawm lub rooj cua txias rau cov menyuam, thiab cov cua ntim yog 100%; Lub rooj rau cov menyuam yog rwb thaiv tsev los ntawm kev kaw lub rwb thaiv tsev, qhov kub ntawm kev nkag mus rau lub rwb thaiv tsev npog yog 640 ~ 660 ℃, thiab qhov kub ntawm kev tawm ntawm lub rwb thaiv tsev npog yog 600 ~ 620 ℃, thiab lub sij hawm nyob rau hauv lub rwb thaiv tsev npog yog 45 ~ 55s.

Cov ntsiab lus technical
Txoj kev tsim khoom ntawm kub dov ribbed steel bar, lub caij nplooj ntoos hlav steel kub dov hlau pas nrig specification yog Φ8mm ~ Φ10mm, cov tshuaj muaj pes tsawg leeg cov ntsiab lus ntawm cov hlau yog 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%, tus so yog Fe thiab unavoidable impurity ntsiab; Cov txheej txheem dov yog: lub qhov cub kub yog 1070 ~ 1130 ℃, thiab ua ntej ua tiav. Qhov kub dov yog 970 ~ 1000 ℃, qhov ua tiav dov kub yog 840 ~ 880 ℃; spinning kub yog 845 ~ 875 ℃; qhov kawg dov kub yog qis dua qhov kub ntawm recrystallization ntawm thaj av austenite; %; Tom qab kaw lub rwb thaiv tsev ntawm cov menyuam, qhov kub ntawm kev nkag mus rau hauv lub rwb thaiv tsev npog yog 640 ~ 660 ℃, thiab qhov kub ntawm kev tawm ntawm lub rwb thaiv tsev npog yog 600 ~ 620 ℃, thiab lub sij hawm nyob rau hauv lub rwb thaiv tsev npog yog 45 ~ 55s. Los ntawm kev ntxiv me me ntawm V alloy thiab ua tiav dov ntawm qhov kub thiab txias, qhov kev tsim khoom tsis tsuas yog ua kom ruaj khov ntawm cov khoom siv, tab sis kuj txo cov ntsiab lus alloy thiab tus nqi.