Cold ua hauj lwm tuag steel yog tsuas yog siv rau stamping, blanking, sib sau, dabtsi yog khoov, txias extrusion, txias drawing, hmoov metallurgy tuag, thiab lwm yam. Nws yuav tsum tau siab hardness, siab hnav kuj thiab txaus toughness. Feem ntau muab faib ua ob pawg: hom dav dav thiab hom tshwj xeeb. Piv txwv li, lub hom phiaj ua haujlwm txias tuag steel hauv Tebchaws Meskas feem ntau suav nrog plaub qib steel: 01, A2, D2, thiab D3. Kev sib piv ntawm cov qib steel ntawm kev ua haujlwm txias txias alloy tuag steel hauv ntau lub teb chaws yog qhia hauv Table 4. Raws li Japanese JIS tus qauv, cov hom tseem ceeb ntawm kev ua haujlwm txias tuag steel uas siv tau yog SK series, suav nrog SK series. carbon cuab yeej steel, 8 SKD series alloy cuab yeej steels, thiab 9 SKHMO series high-speed steels, rau tag nrho ntawm 24 qib steel. Tuam Tshoj tus GB / T1299-2000 alloy cuab yeej steel qauv suav nrog tag nrho ntawm 11 hom hlau, ua tiav cov koob. Nrog rau kev hloov pauv hauv kev siv thev naus laus zis, cov ntaub ntawv ua tiav thiab kev thov rau pwm, cov txheej txheem tseem ceeb tsis tuaj yeem ua tau raws li qhov xav tau. Japanese steel mills thiab cov cuab yeej European loj thiab cov tuam txhab tuag steel tau tsim tshwj xeeb-lub hom phiaj txias ua haujlwm tuag steel, thiab maj mam tsim Cov haujlwm txias txias tuag steel series, kev txhim kho cov haujlwm txias tuag steels kuj yog kev txhim kho kev ua haujlwm txias tuag steel.
Tsawg alloy cua quenching txias ua hauj lwm tuag steel
Nrog rau kev txhim kho ntawm kev kho cua sov thev naus laus zis, tshwj xeeb tshaj yog siv dav siv tshuab nqus tsev quenching tshuab hauv kev lag luam pwm, txhawm rau txo quenching deformation, qee qhov qis-alloy cua-quenched micro-deformation steels tau tsim hauv tsev thiab txawv teb chaws. Hom hlau no yuav tsum tau ua kom zoo hardenability thiab kev kho cua sov Nws muaj me me deformation, zoo zog thiab toughness, thiab muaj qee yam hnav tsis kam. Txawm hais tias tus qauv high-alloy txias ua haujlwm tuag steel (xws li D2, A2) muaj qhov zoo hardenability, nws muaj cov ntsiab lus alloy siab thiab kim. Yog li ntawd, qee qhov qis-alloy micro-deformation steels tau tsim nyob hauv tsev thiab txawv teb chaws. Hom hlau no feem ntau muaj cov ntsiab lus hlau Cr thiab Mn alloy los txhim kho hardenability. Tag nrho cov ntsiab lus ntawm cov ntsiab lus alloy feem ntau yog <5%. Nws yog tsim rau manufacturing precision qhov chaw nrog me me ntau lawm batch. Complex pwm. Cov neeg sawv cev qib steel muaj xws li A6 los ntawm Tebchaws Meskas, ACD37 los ntawm Hitachi Metals, G04 los ntawm Daido Tshwj Xeeb Steel, AKS3 los ntawm Aichi Steel, thiab lwm yam. Suav GD steel, tom qab quenching ntawm 900 ° C thiab tempering ntawm 200 ° C, muaj peev xwm tuav tau ib co nyiaj. ntawm khaws cia austenite thiab muaj lub zog zoo, toughness thiab seem stability. Nws tuaj yeem siv los ua kom txias stamping tuag uas muaj feem rau chipping thiab tawg. Lub neej ua haujlwm siab.
Nplaim quenched pwm steel
Txhawm rau ua kom luv lub voj voog tsim pwm, ua kom yooj yim rau kev kho cua sov, txuag lub zog thiab txo cov nqi tsim pwm. Nyiv tau tsim ib co tshwj xeeb txias ua hauj lwm tuag steels rau nplaim quenching yuav tsum tau. Cov khoom muaj xws li Aichi Steel's SX105V (7CrSiMnMoV), SX4 (Cr8), Hitachi Hlau's HMD5, HMD1, Datong Special Steel Company's G05 steel, thiab lwm yam. Tuam Tshoj tau tsim 7Cr7SiMnMoV. Hom hlau no tuaj yeem siv los ua kom sov cov hniav lossis lwm qhov ntawm cov pwm siv oxyacetylene tsuag phom lossis lwm lub tshuab cua sov tom qab pwm ua tiav thiab tom qab ntawd cua txias thiab quenched. Feem ntau, nws tuaj yeem siv ncaj qha tom qab quenching. Vim nws cov txheej txheem yooj yim, nws tau siv dav hauv Nyiv. Tus neeg sawv cev steel hom ntawm cov hlau no yog 7CrSiMnMoV, uas muaj hardenability zoo. Thaum φ80mm steel yog roj quenched, hardness ntawm ib tug deb ntawm 30mm los ntawm saum npoo yuav ncav cuag 60HRC. Qhov sib txawv ntawm hardness ntawm cov tub ntxhais thiab qhov chaw yog 3HRC. Thaum nplaim hluav taws quenching, Tom qab preheating ntawm 180 ~ 200 ° C thiab cua sov rau 900-1000 ° C rau quenching nrog ib rab phom, lub hardness yuav ncav cuag tshaj 60HRC thiab ib tug hardened txheej tshaj 1.5 hli yuav tau.
High toughness, siab hnav tsis kam txias ua haujlwm tuag steel
Txhawm rau txhim kho lub zog ntawm kev ua haujlwm txias tuag steel thiab txo qhov hnav tsis kam ntawm cov hlau, qee qhov loj txawv teb chaws pwm steel ntau lawm tuam txhab lag luam tau ua tiav cov kev ua haujlwm txias tuag steels nrog ob qho tib si siab toughness thiab siab hnav tsis kam. Hom hlau no feem ntau muaj li 1% carbon thiab 8% Cr. Nrog rau qhov sib ntxiv ntawm Mo, V, Si thiab lwm yam alloying ntsiab lus, nws cov carbides zoo, sib npaug sib npaug, thiab nws cov tawv tawv yog ntau dua li ntawm Cr12 hom hlau, thaum nws hnav tsis kam zoo ib yam. . Lawv hardness, flexural zog, qaug zog thiab tawg toughness yog siab, thiab lawv anti-tempering stability kuj siab dua Crl2 hom pwm hlau. Lawv haum rau high-speed punches thiab multi-station punches. Cov neeg sawv cev steel hom ntawm cov hlau no yog Nyiv DC53 nrog cov ntsiab lus qis V thiab CRU-WEAR nrog cov ntsiab lus siab V. DC53 yog quenched ntawm 1020-1040 ° C thiab hardness tuaj yeem ncav cuag 62-63HRC tom qab cua txias. Nws tuaj yeem tempered ntawm qhov kub thiab txias (180 ~ 200 ℃) thiab kub kub (500 ~ 550 ℃), nws lub zog tuaj yeem yog 1 npaug siab dua D2, thiab nws qhov kev ua haujlwm qaug zog yog 20% siab dua D2; Tom qab CRU-WEAR forging thiab dov, nws yog annealed thiab austenitized ntawm 850-870 ℃. Tsawg dua 30 ℃ / teev, txias rau 650 ℃ thiab tso tawm, hardness tuaj yeem ncav cuag 225-255HB, quenching kub tuaj yeem xaiv nyob rau hauv thaj tsam ntawm 1020 ~ 1120 ℃, hardness tuaj yeem ncav cuag 63HRC, tempered ntawm 480 ~ 570 ℃ raws li rau kev siv, nrog pom tseeb theem nrab Cov nyhuv hardening, hnav tsis kam thiab toughness zoo dua li D2.
Base steel (High-speed steel)
High-speed steel tau dav siv nyob rau hauv txawv teb chaws los tsim high-kev ua tau zoo, lub neej ntev txias ua hauj lwm pwm vim nws zoo heev hnav tsis kam thiab liab hardness, xws li Nyiv tus qauv kev kub ceev steel SKH51 (W6Mo5Cr4V2). Txhawm rau hloov mus rau qhov yuav tsum tau ua ntawm cov pwm, lub toughness feem ntau yog txhim kho los ntawm kev txo qhov kub thiab txias, quenching hardness los yog txo cov ntsiab lus carbon hauv high-speed steel. Matrix steel yog tsim los ntawm high-speed steel, thiab nws cov tshuaj muaj pes tsawg leeg yog sib npaug rau cov matrix muaj pes tsawg leeg ntawm high-speed steel tom qab quenching. Yog li ntawd, tus naj npawb ntawm cov carbides residual tom qab quenching yog me me thiab sib npaug, uas zoo heev txhim kho lub toughness ntawm cov hlau piv rau high-speed steel. Tebchaws Asmeskas thiab Nyij Pooj tau kawm cov hlau hauv qab nrog qib VascoMA, VascoMatrix1 thiab MOD2 thaum xyoo 1970s. Tsis ntev los no, DRM1, DRM2, DRM3, thiab lwm yam tau tsim. Feem ntau siv rau cov pwm ua haujlwm txias uas yuav tsum tau muaj zog dua thiab zoo dua los tiv thaiv tempering. Tuam Tshoj kuj tau tsim qee lub hauv paus steels, xws li 65Nb (65Cr4W3Mo2VNb), 65W8Cr4VTi, 65Cr5Mo3W2VSiTi thiab lwm yam steels. Cov hlau no muaj lub zog zoo thiab muaj zog thiab yog dav siv nyob rau hauv txias extrusion, tuab phaj txias punching, xov dov log, impression tuag, txias taub hau tuag, thiab lwm yam, thiab yuav siv tau raws li sov extrusion tuag.
Hmoov metallurgy pwm steel
LEDB-hom high-alloy txias ua hauj lwm tuag steel tsim los ntawm cov txheej txheem ib txwm, tshwj xeeb tshaj yog cov ntaub ntawv loj, muaj coarse eutectic carbides thiab tsis sib npaug tis, uas tiag txo lub toughness, grindability thiab isotropy ntawm cov hlau. Nyob rau hauv xyoo tas los no, cov tuam txhab txawv teb chaws tshwj xeeb steel uas tsim cov cuab yeej thiab cov hlau tuag tau tsom mus rau kev tsim cov hmoov hlau metallurgy high-speed steel thiab high-alloy tuag steel, uas tau ua rau txoj kev loj hlob sai ntawm cov hlau no. Siv cov txheej txheem hmoov hlau metallurgy, atomized steel hmoov txias sai sai thiab cov carbides tsim tau zoo thiab zoo ib yam, uas ua rau muaj kev txhim kho toughness, grindability thiab isotropy ntawm pwm khoom. Vim yog cov txheej txheem tsim khoom tshwj xeeb no, cov carbides zoo thiab tsis sib xws, thiab kev ua haujlwm zoo thiab kev sib tsoo tau txhim kho, tso cai rau cov pa roj carbon ntau dua thiab vanadium ntxiv rau cov hlau, yog li tsim cov hlau tshiab. Piv txwv li, Nyiv lub Datong's DEX series (DEX40, DEX60, DEX80, thiab lwm yam), Hitachi Hlau's HAP series, Fujikoshi's FAX series, UDDEHOLM's VANADIS series, Fabkis's Erasteel's ASP series, thiab American CRUCIBLE lub tuam txhab cov hmoov metallurgy cov cuab yeej sai thiab tuag. . Kev tsim cov hmoov hlau metallurgy xws li CPMlV, CPM3V, CPMlOV, CPM15V, thiab lwm yam, lawv cov kev hnav tsis kam thiab tawv tau zoo dua qub piv rau cov cuab yeej thiab cov hlau tuag uas tsim los ntawm cov txheej txheem zoo tib yam.
Post lub sij hawm: Apr-02-2024