Cov hlau nruab nrab thiab qis qis yog ib pawg loj ntawm cov hlau alloy nrog cov ntsiab lus alloying (feem ntau yog cov khoom siv tshuaj xws li silicon, manganese, chromium, molybdenum, npib tsib xee, tooj liab thiab vanadium) cov ntsiab lus tsawg dua 8%. Nruab nrab thiab qis alloy steel castings muaj hardenability zoo, thiab cov khoom zoo txhua yam tuaj yeem tau txais tom qab kev kho cua sov kom zoo.
Kev kho cua sov Specifications ntawm qis thiab nruab nrab Alloy Steel Castings
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| Qib | Qeb Hlau | Specifications ntawm kev kho cua sov | |||
| Txoj Kev Kho Mob | Kub / ℃ | Txoj kev txias | Hardness / HBW | ||
| ZG 16 Mn | Manganese hlau | normalizing | 900 | Cua txias hauv huab cua | / |
| Tempering | 600 | ||||
| ZG22Mn | Manganese hlau | normalizing | 880-900 ib | Cua txias hauv huab cua | 155 |
| Tempering | 680-700 Nws | ||||
| ZG 25 Mn | Manganese hlau | Annealing los yog Tempering | / | / | 155-170 : kuv |
| ZG25Mn 2 | Manganese hlau | 200-250 | |||
| ZG30Mn | Manganese hlau | 160-170 ib | |||
| ZG35Mn | Manganese hlau | normalizing | 850-860 ib | Cua txias hauv huab cua | / |
| Tempering | 560-600 Nws | ||||
| ZG40Mn | Manganese hlau | normalizing | 850-860 ib | Cua txias hauv huab cua | 163 |
| Tempering | 550-600 | Txias hauv qhov cub | |||
| ZG40Mn 2 | Manganese hlau | Annealing | 870-890 ib | Txias hauv qhov cub | 187-255 : kuv |
| Quenching | 830-850 ib | Txias hauv roj | |||
| Tempering | 350-450 ib | Cua txias hauv huab cua | |||
| ZG45Mn | Manganese hlau | normalizing | 840-860 ib | Cua txias hauv huab cua | 196-235 : kuv |
| Tempering | 550-600 | Txias hauv qhov cub | |||
| ZG45Mn 2 | Manganese hlau | normalizing | 840-860 ib | Cua txias hauv huab cua | ≥ 179 |
| Tempering | 550-600 | Txias hauv qhov cub | |||
| ZG50Mn | Manganese hlau | normalizing | 860-880 ib | Cua txias hauv huab cua | 180-220 : kuv |
| Tempering | 570-640 Ib | Txias hauv qhov cub | |||
| ZG50Mn 2 | Manganese hlau | normalizing | 850-880 ib | Cua txias hauv huab cua | / |
| Tempering | 550-650 | Txias hauv qhov cub | |||
| ZG65Mn | Manganese hlau | normalizing | 840-860 ib | / | 187-241 : kuv |
| Tempering | 600-650 | ||||
| ZG20SiMn | Silicon-Manganese hlau | normalizing | 900-920 ib | Cua txias hauv huab cua | 156 |
| Tempering | 570-600 Nws | Txias hauv qhov cub | |||
| ZG30SiMn | Silicon-Manganese hlau | normalizing | 870-890 ib | Cua txias hauv huab cua | / |
| Tempering | 570-600 Nws | Txias hauv qhov cub | |||
| Quenching | 840-880 ib | Txias hauv roj / dej | / | ||
| Tempering | 550-600 | Txias hauv qhov cub | |||
| ZG35SiMn | Silicon-Manganese hlau | normalizing | 860-880 ib | Cua txias hauv huab cua | 163-207 : kuv |
| Tempering | 550-650 | Txias hauv qhov cub | |||
| Quenching | 840-860 ib | Txias hauv roj | 196-255 : kuv | ||
| Tempering | 550-650 | Txias hauv qhov cub | |||
| ZG45SiMn | Silicon-Manganese hlau | normalizing | 860-880 ib | Cua txias hauv huab cua | / |
| Tempering | 520-650 ib | Txias hauv qhov cub | |||
| ZG20MnMo | Manganese Molybdenum Hlau | normalizing | 860-880 ib | / | / |
| Tempering | 520-680 ib | ||||
| ZG30CrMnSi | Chromium Manganese Silicon hlau | normalizing | 800-900 Nws | Cua txias hauv huab cua | 202 |
| Tempering | 400-450 | Txias hauv qhov cub | |||
| ZG35CrMnSi | Chromium Manganese Silicon hlau | normalizing | 800-900 Nws | Cua txias hauv huab cua | ≤ 217 |
| Tempering | 400-450 | Txias hauv qhov cub | |||
| normalizing | 830-860 ib | Cua txias hauv huab cua | / | ||
| 830-860 ib | Txias hauv roj | ||||
| Tempering | 520-680 ib | Txias hauv huab cua / qhov cub | |||
| ZG35SiMnMo | Silico-manganese-molybdenum hlau | normalizing | 880-900 ib | Cua txias hauv huab cua | / |
| Tempering | 550-650 | Txias hauv huab cua / qhov cub | |||
| Quenching | 840-860 ib | Txias hauv roj | / | ||
| Tempering | 550-650 | Txias hauv qhov cub | |||
| ZG30Cr | Chrome Hlau | Quenching | 840-860 ib | Txias hauv roj | ≤ 212 |
| Tempering | 540-680 ib | Txias hauv qhov cub | |||
| ZG40Cr | Chrome Hlau | normalizing | 860-880 ib | Cua txias hauv huab cua | ≤ 212 |
| Tempering | 520-680 ib | Txias hauv qhov cub | |||
| normalizing | 830-860 ib | Cua txias hauv huab cua | 229-321 : kuv | ||
| Quenching | 830-860 ib | Txias hauv roj | |||
| Tempering | 525-680 : kuv | Txias hauv qhov cub | |||
| ZG50Cr | Chrome Hlau | Quenching | 825-850 : kuv | Txias hauv roj | ≥ 248 |
| Tempering | 540-680 ib | Txias hauv qhov cub | |||
| ZG70 Cr | Chrome Hlau | normalizing | 840-860 ib | Cua txias hauv huab cua | ≥ 217 |
| Tempering | 630-650 ib | Txias hauv qhov cub | |||
| ZG35 SiMo | Silicon Molybdenum Steel | normalizing | 880-900 ib | / | / |
| Tempering | 560-580 ib | ||||
| ZG20Mo | Molybdenum hlau | normalizing | 900-920 ib | Cua txias hauv huab cua | 135 |
| Tempering | 600-650 | Txias hauv qhov cub | |||
| ZG20CrMo | Chrome-molybdenum hlau | normalizing | 880-900 ib | Cua txias hauv huab cua | 135 |
| Tempering | 600-650 | Txias hauv qhov cub | |||
| ZG35CrMo | Chrome-molybdenum hlau | normalizing | 880-900 ib | Cua txias hauv huab cua | / |
| Tempering | 550-600 | Txias hauv qhov cub | |||
| Quenching | 850 | Txias hauv roj | 217 | ||
| Tempering | 600 | Txias hauv qhov cub | |||
Cov yam ntxwv ntawm kev kho cua sov ntawm nruab nrab thiab qis Alloy Steel Castings:
1. Qhov nruab nrab thiab qis alloy steel castings feem ntau yog siv rau hauv kev lag luam machinery xws li tsheb, tsheb laij teb, tsheb ciav hlau, kev tsim kho tshuab, thiab hydraulic systems. Cov kev lag luam no xav tau castings nrog lub zog zoo thiab toughness. Rau castings xav tau lub zog tensile tsawg dua 650 MPa, normalizing + tempering tshav kub kho feem ntau yog siv; rau nruab nrab thiab qis alloy steel castings uas xav tau lub zog tensile ntau dua 650 MPa, quenching + kub tempering kub kho yog siv. Tom qab quenching thiab tempering, metallurgical qauv ntawm cov hlau casting yog tempered sorbite, thiaj li kom tau txais lub zog ntau dua thiab zoo toughness. Txawm li cas los xij, thaum cov duab thiab qhov loj ntawm cov casting tsis haum rau quenching, normalizing + tempering yuav tsum tau siv es tsis txhob quenching thiab tempering.
2. Nws yog qhov zoo dua los ua normalizing lossis normalizing + tempering pretreatment ua ntej quenching thiab tempering ntawm nruab nrab thiab qis alloy steel castings. Nyob rau hauv txoj kev no, lub pob zeb siv lead ua ntawm cov hlau casting tuaj yeem ua kom zoo dua thiab cov qauv zoo sib xws, yog li txhim kho cov nyhuv ntawm qhov kawg quenching thiab tempering kev kho mob, thiab tseem pab kom tsis txhob muaj qhov tsis zoo ntawm cov kev ntxhov siab hauv cov casting.
3. Tom qab kev kho quenching, qhov nruab nrab thiab qis alloy steel castings yuav tsum tau txais cov qauv martensite kom ntau li ntau tau. Txhawm rau ua tiav lub hom phiaj no, qhov kub thiab txias nruab nrab yuav tsum raug xaiv raws li qib cam khwb cia hlau, hardenability, casting phab ntsa thickness, zoo li thiab lwm yam.
4. Txhawm rau kho cov qauv quenching ntawm cov cam khwb cia hlau thiab tshem tawm cov kev ntxhov siab quenching, qhov nruab nrab thiab qis alloy steel castings yuav tsum tau tempered tam sim ntawd tom qab quenching.
5. Nyob rau hauv lub premise ntawm tsis txo lub zog ntawm steel castings, nruab nrab-carbon low-alloy high-strength steel castings yuav toughened. Toughening kev kho mob tuaj yeem txhim kho cov plasticity thiab toughness ntawm steel castings.
Kub thiab Hardness ntawm Low Alloy Steel tom qab QT Thaum tshav kub kub kho
| |||
| Tsawg thiab Nruab Nrab Alloy Steel Qib | Quenching Kub / ℃ | Tempering Kub / ℃ | Hardness / HBW |
| ZG40Mn 2 | 830-850 ib | 530-600 Nws | 269-302 : kuv |
| ZG35Mn | 870-890 ib | 580-600 Nws | ≥ 195 |
| ZG35SiMnMo | 880-920 : kuv | 550-650 | / |
| ZG40Cr1 | 830-850 ib | 520-680 ib | / |
| ZG35Cr1Mo | 850-880 ib | 590-610 : kuv | / |
| ZG42Cr1Mo | 850-860 ib | 550-600 | 200-250 |
| ZG50Cr1Mo | 830-860 ib | 540-680 ib | 200-270 Nws |
| ZG30CrNiMo | 860-870 ib | 600-650 | ≥ 220 |
| ZG34Cr2Ni2Mo | 840-860 ib | 550-600 | 241-341 ib |
Post lub sij hawm: Lub Xya hli ntuj-31-2021