SAE4340 Steel Round Bar ASTM4340 Birta Birta
Astaamaha
Qalabka 4340 birta birta ah waa birta qaab dhismeedka alloy.U dhiganta heerka DIN Jarmal DIN birta 36CrNiMo4, Heerka Faransiiska NF 40NCD3, Jaban JIS heerka SNCM439, heerka British BS 816M40, American SAE/ASTM4340, American UNS heerka G43400, Shiinaha Standard 40CrNiMoA.
SAE4340 waxaa loo yaqaanaa birta qaab dhismeedka alloy ama birta isku dhafan.Birtu waxa ay ka kooban tahay nikkel inta u dhaxaysa 1.65 iyo 2.00, kaas oo leh xoog sare, adayg, awood adag oo sareeya, iyo xasilooni ka soo horjeeda kulaylka.Si kastaba ha ahaatee, waxay leedahay dareen sare oo dhibco cadcad iyo xanaaq.Akhris la'aanta liidata, u baahan kuleyl heer sare ah ka hor alxanka ka hor, culayska dhimista alxanka ka dib, iyo isticmaalka xanaaqa ka dib.
HEERKA: ASTM A29/A29M-2012 ama SAE J404
Tilmaamid
| Kaarboon C | 0.38-0.43 |
| Silikoon Si | 0.15-0.35 |
| Manganese Mn | 0.60 ~ 0.80 |
| Sulfur S | ≤ 0.030 |
| Fosfooraska P | ≤ 0.025 |
| Chromium Cr | 0.60 ~ 0.90 |
| Nikkel | 1.65-2.00 |
| Copper Cu | ≤ 0.025 |
| Molybdenum Mo | 0.20-0.30 |
Guryaha makaanikada
| Xoog xajin σ b (MPa) | ≥980 |
| Awood-soo-saarka σ s (MPa) | ≥835 |
| Heerka kordhinta δ 5 (%) | ≥12 |
| Dhimista aagga ψ (%) | ≥55 |
| Saamaynta tamarta Akv (J) | ≥ 78 |
| Qiimaha adkaanta saamaynta α kv (J/cm2) | ≥98 |
Tilmaamaha daaweynta kulaylka
Demiyay at 850 ℃, saliid la qaboojiyey;Heerkulka 600 ℃, biyo la qaboojiyey, saliid la qaboojiyey.
Codsiga
Caadi ahaan loo isticmaalo wax soo saarka qaybo muhiim ah oo leh xoog sare iyo caag wanaagsan, iyo soo saarista qaybo muhiim ah oo leh shuruudo shaqo oo gaar ah ka dib daaweynta nitrate:
-Mashiinada culus oo leh tubooyinka culeyska sare leh
-Shashka giraangiraha leh dhexroor ka weyn 250mm
-Qalabka rotor ee diyaarad helicopter ah
- Usha marawaxadaha, daabadaha, iyo qaybaha gudbinta culayska sare ee matoorka turbojet
- Xidhiidhiyayaasha, marshadaha, iwm.
Xidhmada
1.By xidhmooyinka, xidhmo kasta oo miisaankeedu ka yar yahay 3 tan, ee dibadda yardhexroor bar wareeg ah, xidhmo kasta oo leh 4 - 8 strips bir ah.
2.20 cagood weel ka kooban cabbir, dherer ka hooseeya 6000mm
3.40 cagood weel ka kooban cabbir, dherer ka hooseeya 12000mm
4.By markabka bulk, khidmadda xamuulku waa ku yar yahay xamuulka badan, iyo weyncabbirrada culculus laguma rari karo weelasha waxaa lagu rari karaa xamuul badan
Xidhmada
Hubinta tayada
1. Ku adkee sida Shuruudaha
2. Tusaale: Muunad ayaa diyaar ah.
3. Tijaabooyinka: Tijaabada buufinta milixdu / Tijaabada xajinta / Eddy hadda / tijaabinta ka kooban kiimikaad sida waafaqsan codsiga macaamiisha
4. Shahaadada: IATF16949, ISO9001, SGS iwm.
5. EN 10204 3.1 Shahaadada
