Tuam Tshoj ASTM A681 D7 Tool Steel Bar Chaw tsim tshuaj paus thiab tsum
D7 Tool Steel yog cov pa roj carbon siab, siab chromium cua hardening cuab yeej hlau nrog zoo heev hnav tsis kam.
Qhov kev hnav tsis kam no feem ntau yog vim nws cov pa roj carbon ntau thiab cov ntsiab lus vanadium, uas ua rau muaj coob tus ntawm cov nyuaj vanadium carbide hais nyob rau hauv cov hlau, nrog ib tug hardness sib npaug li 80 mus rau 85 Rockwell C.
Cov cuab yeej no ua rau D7 cov cuab yeej steel zoo tiv thaiv hnav thaum zawv zawg sib cuag nrog lwm cov hlau thiab sib cuag nrog qhuav thiab ntub slurries ntawm tawv abrasive hais xws li xuab zeb, tua blasting media thiab ceramics.
D7 cuab yeej steel yog dav siv, feem ntau suav nrog cib pwm linings, briquetting pwm, txhaj tshuaj blasting khoom linings, ceramic extrusion thiab tsim cov cuab yeej, hmoov compaction cov cuab yeej, sib sib zog nqus nqus tuag, flattening rollers thiab tshuab cuab yeej qhia rails, thiab lwm yam.
Hauv daim ntawv thov no, qhov hnav tsis kam, hardness thiab toughness ntawm D7 cuab yeej steel yog siv tag nrho.
Hais txog kev kho cua sov, cov txheej txheem hardening ntawm D7 cuab yeej steel xav tau cov kauj ruam xws li preheating, austenitization (siab kub) thiab tempering.
Qhov kub thiab txias yog 300 ° F (149 ° C) rau qhov siab tshaj plaws hnav tsis kam. Tsis tas li, rau qhov siab tshaj plaws, ob chav tempering tuaj yeem ua tau, tuav ntawm qhov kub siab tshaj 950 ° F (510 ° C) rau ob teev thiab tom qab ntawd tuav rau lwm ob teev.
Nyob rau hauv cov nqe lus ntawm txiav workability, txiav workability ntawm D7 cuab tam steel yog hais txog 30-35% ntawm 1% carbon steel. Qhov no txhais tau hais tias cov cuab yeej tsim nyog thiab cov txheej txheem yuav tsum tau ua thaum lub sijhawm machining kom ntseeg tau tias kev ua haujlwm zoo thiab ua haujlwm tau zoo.
Feem ntau, D7 cov cuab yeej steel yog cov cuab yeej hnav-tiv taus zoo rau ntau yam kev thov uas yuav tsum tau tiv taus hnav thiab cuam tshuam.
Nws zoo heev hnav tsis kam, hardness thiab toughness, raws li zoo raws li zoo txiav processability, ua rau nws lug siv nyob rau hauv industrial manufacturing.
D7 cov cuab yeej steel yog cov khoom zoo siab-carbon, high-chromium alloy cov cuab yeej hlau uas tuav txoj haujlwm tseem ceeb hauv kev tsim khoom rau nws lub cev thiab tshuaj lom neeg zoo heev. Tsab ntawv xov xwm no tsom mus rau nthuav dav cov lus qhia tshwj xeeb ntawm D7 cov cuab yeej steel thiab nws cov kev siv tseem ceeb.
Cov yam ntxwv tseem ceeb ntawm D7 Tool Steel
High hardness thiab muaj zog hnav tsis kam: Tom qab kev kho cua sov kom zoo, D7 steel tuaj yeem ncav cuag hardness siab heev, muab nws zoo heev hnav tsis kam.
Cov yam ntxwv no ua rauD7 hlauzoo heev nyob rau hauv kev ua hauj lwm ib puag ncig uas raug rau siab loads thiab high-ceev kev sib txhuam.
Impact resistance: Vim nws cov hardness siab thiab zoo toughness, D7 cuab yeej steel muaj kev cuam tshuam zoo thiab muaj peev xwm tswj tau cov qauv kev ncaj ncees thaum cuam tshuam los ntawm sab nraud rog.
Corrosion kuj: D7 cuab yeej steel muaj qee qhov nyiaj ntawm chromium, uas tso cai rau nws kom muaj kev ruaj ntseg zoo thiab ua haujlwm ntev hauv qee qhov chaw corrosive.
Dab tsi yog qhov txawv ntawm D7 thiab D2 cuab yeej steel?
D7 cuab yeej hlau thiab D2 cuab yeej hlau (tseem hu ua Cr12MoV) yog ob lub cuab yeej sib txawv, txhua tus muaj cov khoom tshwj xeeb thiab kev siv.
D7 Tool Steel yog cov pa roj carbon siab, siab chromium cua hardening cuab yeej hlau nrog zoo heev hnav tsis kam. Nws cov ntsiab lus siab carbon thiab vanadium ua rau muaj coob tus ntawm cov tawv vanadium carbide hais nyob rau hauv cov hlau, nrog ib tug hardness sib npaug li 80 mus rau 85 Rockwell C.
Yog li ntawd, nws zoo tiv taus hnav los ntawm zawv zawg sib cuag nrog lwm cov hlau thiab qhuav thiab ntub slurry tiv tauj nrog nyuaj abrasive hais xws li xuab zeb, tua blasting media thiab ceramics. Qhov no ua rau D7 cov cuab yeej hlau tsim nyog rau ntau yam kev siv, nrog rau cov cib pwm hauv ob sab phlu, briquetting tuag, tua blasting khoom linings, ceramic extrusion thiab tsim cov cuab yeej, hmoov compaction cov cuab yeej, sib sib zog nqus nqus tuag, flattening rollers thiab tshuab cuab yeej qhia rails.
D2 cuab yeej steel (Cr12MoV) kuj yog cov pa roj carbon ntau, high-chromium cov cuab yeej steel nrog zoo hardness, hnav tsis kam, corrosion kuj thiab deformation kuj. Nws cov ntsiab lus carbon yog siab li 1.40% -1.60%, uas txhim kho nws cov tawv tawv thiab hnav tsis kam.
Nyob rau tib lub sijhawm, cov hlau kuj tseem muaj cov ntsiab lus chromium thiab molybdenum, uas tuaj yeem txhim kho nws cov corrosion kuj zoo.
D2 cov cuab yeej hlau tuaj yeem tau txais cov cuab yeej zoo thiab cov tawv tawv los ntawm cov txheej txheem kho cua sov xws li quenching thiab tempering, thiab muaj kev ua haujlwm zoo kom tau raws li ntau yam kev xav tau. Cov khoom no ua rau D2 cov cuab yeej steel dav siv hauv kev tsim cov khoom siv high-end xws li pwm, txiav cov cuab yeej thiab forging tuag.
D7 Tool steel round bar
Tshuaj muaj pes tsawg leeg (mass feem) (wt.%) ntawm D7 cuab yeej steel
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Mo(％) | V(%) |
| 2.15-2.50 Nws | 0.10-0.60 Nws | 0.10-0.60 Nws | ≤ 0.030 | ≤ 0.030 | 11.5-13.5 Nws | 0.70-1.20 Nws | 3.80-4.40 Nws |
ASTM A681-USA
FED QQ-T-570-US
SAE J437-US
SAE J438-US
UNS T30407-US
AISI D7 Tool Steel-US
Smelting Option ntawm D7
1 EAF: Hluav taws xob Arc Rauv
2 EAF + LF + VD: Refined-smelting thiab nqus degassing
3 EAF + ESR: Electro Slag Remelting
4 EAF + PESR: tiv thaiv huab cua Electro Slag Remelting
5 VIM + PESR: Nqus induction melting
Kev tsim Kev xaiv ntawm D7 Steel
1 Cov txheej txheem kub dov
2 Kub Forging: Electro-hydraulic; Kev kub ceev-hydraulic; Roj-hydraulic; Precision-forging
Kev kho cua sov Option d7 cev
1 + A: Annealed (tag nrho / mos / spheroidizing)
2 + N: Normalized
3 + NT: Normalized thiab tempered
4 + QT: quenched thiab tempered (dej / roj)
Kev xaiv Suface ntawm Tool Steel
1 Dub Nto
2 Grounded: ci tab sis ntxhib; Tsis precision
3 Machining rau phaj: ci thiab precision; Me ntsis tig caws pliav
4 Peeled / Tig: ci thiab precision; Me ntsis tig caws pliav
5 Polished: Heev ci thiab precision loj; Tsis tig caws pliav
MECHANICAL PROPERTIES OF KHOOM STEEL D7
| Yield Rp0.2 (MPa) | Tensile Rm (MPa) | Kev cuam tshuam KV/Ku (J) | Elongation A (%) | Kev txo qis hauv ntu ntu ntawm pob txha Z (%) | Raws li-kub-kho mob | Brinell hardness (HBW) |
| 984 (≥) | 682 (≥) | 41 | 31 | 23 | Kev daws thiab Kev laus, Annealing, Ausaging, Q + T, thiab lwm yam | 322 |
| Cov khoom | Txoj kab uas hla (mm) | Ntev (mm) |
| Rolled Bar | 10-95 : kuv | 3000-5700 Nws |
| Forged Bar | 95-440 : kuv | 3000-5700 Nws |
| Billet | 130 × 130,140 × 140,150 × 150,160 × 160 | 7000 Max |
