Tagraíonn cruach teilgthe cóimhiotail íseal do chruach teilgthe cóimhiotail le cion carbóin níos lú ná 0.45% agus cion iomlán d'eilimintí cóimhiotail eile nach mó ná 5%. Tá ard-neart, toughness maith agus hardenability ag cruach teilgthe cóimhiotail íseal. Go ginearálta tá eilimintí cóimhiotail mar mhangainéis, cróimiam, copar, nicil, moluibdín, agus vanadium i cruach teilgthe cóimhiotail íseal. Tá déine tionchair níos mó acu agus is féidir leo airíonna meicniúla níos fearr a fháil trí chóireáil teasa. Tá friotaíocht creimeadh agus friotaíocht caitheamh cruach teilgthe cóimhiotail íseal níos fearr ná cruach carbóin, rud a d'fhéadfadh meáchan na gcodanna a laghdú agus saol na seirbhíse a mhéadú.
Gráid agus Comhdhéanamh Ceimiceach de Cruach Teilgthe Íseal Cóimhiotail | |||||||||
Grád | C (%) | Si (%) | Mn (%) | P≦ (%) | S≦ (%) | Cr (%) | Ni (%) | Mo (%) | Cu≦ (%) |
ZG20Mn | 0.16~0.22 | 0.6~0.8 | 1.00~1.30 | 0. 03 | 0. 03 | —— | ≦ 0.4 | —— | —— |
ZG30Mn | 0.27~0.34 | 0.30~0.50 | 1.20~1.50 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG35Mn | 0.30~0.40 | 0.60~0.80 | 1.10~1.40 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG40Mn | 0.35~0.45 | 0.30~0.45 | 1.20~1.50 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG40Mn2 | 0.35~0.45 | 0.20~0.40 | 1.60~1.80 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG45Mn2 | 0.42~0.49 | 0.20~0.40 | 1.60~1.80 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG50Mn2 | 0.45~0.55 | 0.20~0.40 | 1.50~1.80 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG35SiMnMo | 0.32~0.40 | 1.10~1.40 | 1.10~1.40 | 0. 03 | 0. 03 | —— | 0.20~0.30 | 0.3 | |
ZG35CrMnSi | 0.30~0.40 | 0.50~0.75 | 0.90~1.20 | 0. 03 | 0. 03 | 0.50~0.80 | —— | —— | —— |
ZG20MnMo | 0.17~0.23 | 0.20~0.40 | 1.10~1.40 | 0. 03 | 0. 03 | —— | —— | 0.20~0.35 | 0.3 |
ZG30Cr1MnMo | 0.25~0.35 | 0.17~0.45 | 0.90~1.20 | 0. 03 | 0. 03 | 0.90~1.20 | 0.20~0.30 | —— | |
ZG55CrMnMo | 0.50~0.60 | 0.25~0.60 | 1.20~1.80 | 0. 03 | 0. 03 | 0.60~0.90 | —— | 0.20~0.30 | 0.3 |
ZG40Cr1 | 0.35~0.45 | 0.20~0.40 | 0.50~0.80 | 0. 03 | 0. 03 | 0.80~1.10 | —— | —— | —— |
ZG34Cr2Ni2Mo | 0.30~0.37 | 0.30~0.60 | 0.60~1.00 | 0. 03 | 0. 03 | 1.40~1.70 | 1.40~1.70 | 0.15~0.35 | —— |
ZG15Cr1Mo | 0.12~0.20 | 0.6 | 0.50~0.80 | 0. 03 | 0. 03 | 1.00~1.50 | —— | 0.45~0.65 | —— |
ZG20CrMo | 0.17~0.25 | 0.20~0.45 | 0.50~0.80 | 0. 03 | 0. 03 | 0.50~0.80 | —— | 0.45~0.65 | —— |
ZG35Cr1Mo | 0.30~0.37 | 0.30~0.50 | 0.50~0.80 | 0. 03 | 0. 03 | 0.80~1.20 | —— | 0.20~0.30 | —— |
ZG42Cr1Mo | 0.38~0.45 | 0.30~0.60 | 0.60~1.00 | 0. 03 | 0. 03 | 0.80~1.20 | —— | 0.20~0.30 | —— |
ZG50Cr1Mo | 0.46~0.54 | 0.25~0.50 | 0.50~0.80 | 0. 03 | 0. 03 | 0.90~1.20 | —— | 0.15~0.25 | —— |
ZG65Mn | 0.60~0.70 | 0.17~0.37 | 0.90~1.20 | 0. 03 | 0. 03 | —— | —— | —— | —— |
ZG28NiCrMo | 0.25~0.30 | 0.30~0.80 | 0.60~0.90 | 0. 03 | 0. 03 | 0.35~0.85 | 0.40~0.80 | 0.35~0.55 | —— |
ZG30NiCrMo | 0.25~0.35 | 0.30~0.60 | 0.70~1.00 | 0. 03 | 0. 03 | 0.60~0.90 | 0.60~1.00 | 0.35~0.50 | —— |
ZG35NiCrMo | 0.30~0.37 | 0.60~0.90 | 0.70~1.00 | 0. 03 | 0. 03 | 0.40~0.90 | 0.60~0.90 | 0.40~0.50 | —— |
Airíonna meicniúla cruach teilgthe cóimhiotail íseal | |||||||||
Grád | Cóireáil Teasa | Neart Toradh Rp0.2/Mpa (≧) | Neart Teanntachta Rm/Mpa (≧) | A(%) ≧ | Z(%) ≧ | KU2/J ≧ | KV2/J ≧ | AKDVM/J ≧ | Cruas HBW |
ZG20Mn | Normalú + Tempering | 285 | 495 | 18 | 30 | 39 | —— | —— | 145 |
Múchadh + Tempering | 300 | 500~650 | 24 | —— | —— | 45 | —— | 150~190 | |
ZG30Mn | Normalú + Tempering | 300 | 558 | 18 | 30 | —— | —— | —— | 163 |
ZG35Mn | Normalú + Tempering | 345 | 570 | 12 | 20 | 24 | —— | —— | —— |
Múchadh + Tempering | 415 | 640 | 12 | 25 | 27 | —— | 27 | 200~240 | |
ZG40Mn | Normalú + Tempering | 295 | 640 | 12 | 30 | —— | —— | —— | 163 |
ZG40Mn2 | Normalú + Tempering | 395 | 590 | 20 | 40 | 30 | —— | —— | 179 |
Múchadh + Tempering | 685 | 835 | 13 | 45 | 35 | —— | 35 | 269~302 | |
ZG45Mn2 | Normalú + Tempering | 392 | 637 | 15 | 30 | —— | —— | —— | 179 |
ZG50Mn2 | Normalú + Tempering | 445 | 785 | 18 | 37 | —— | —— | —— | —— |
ZG35SiMnMo | Normalú + Tempering | 395 | 640 | 12 | 20 | 24 | —— | —— | —— |
Múchadh + Tempering | 490 | 490 | 12 | 25 | 27 | —— | 27 | —— | |
ZG35Mn | Normalú + Tempering | 345 | 570 | 12 | 20 | 24 | —— | —— | —— |
Múchadh + Tempering | 415 | 640 | 12 | 25 | 27 | —— | 27 | —— | |
ZG35CrMnSi | Normalú + Tempering | 345 | 690 | 14 | 30 | —— | —— | —— | 217 |
ZG20MnMo | Normalú + Tempering | 295 | 490 | 16 | —— | 39 | —— | —— | 156 |
ZG30Cr1MnMo | Normalú + Tempering | 392 | 686 | 15 | 30 | —— | —— | —— | —— |
ZG55CrMnMo | Normalú + Tempering | / | / | —— | —— | —— | —— | —— | —— |
ZG40Cr1 | Normalú + Tempering | 345 | 630 | 18 | 26 | —— | —— | —— | 212 |
ZG34Cr2Ni2Mo | Múchadh + Tempering | 700 | 950~1000 | 12 | —— | —— | 32 | —— | 240~290 |
ZG15Cr1Mo | Normalú + Tempering | 275 | 490 | 20 | 35 | 24 | —— | —— | 140~220 |
ZG20CrMo | Normalú + Tempering | 245 | 460 | 18 | 30 | 30 | —— | —— | 135~180 |
Múchadh + Tempering | 245 | 460 | 18 | 30 | 24 | —— | —— | —— | |
ZG35Cr1Mo | Normalú + Tempering | 392 | 588 | 12 | 20 | 23.5 | —— | —— | —— |
Múchadh + Tempering | 510 | 686 | 12 | 25 | 31 | —— | 27 | 201 | |
ZG42Cr1Mo | Normalú + Tempering | 343 | 569 | 12 | 20 | —— | 30 | —— | —— |
Múchadh + Tempering | 490 | 690~830 | 11 | —— | —— | —— | 21 | 200~250 | |
ZG50Cr1Mo | Múchadh + Tempering | 520 | 740~880 | 11 | —— | —— | —— | 34 | 200–260 |
ZG65Mn | Normalú + Tempering | / | / | —— | —— | —— | —— | —— | —— |
ZG28NiCrMo | —— | 420 | 630 | 20 | 40 | —— | —— | —— | —— |
ZG30NiCrMo | —— | 590 | 730 | 17 | 35 | —— | —— | —— | —— |
ZG35NiCrMo | —— | 660 | 830 | 14 | 30 | —— | —— | —— | —— |
Am postála: Meán Fómhair-29-2024