AISI 4140 1.7225 42CrMo4 SCM440 B7 Chitsulo Bar
Kufotokozera Kwachidule:
Chitsulo cha AISI SAE 4140 alloy ndi chitsulo cha chromium molybdenum alloy chomwe chimagwiritsidwa ntchito kwambiri pazitsulo zomangira, monga ma axles, shafts, bolts, magiya ndi ntchito zina.
Mipiringidzo ya Chitsulo cha Kaboni:
AISI 4140, 1.7225 (42CrMo4), SCM440, ndi B7 Steel Bar ndi mayina osiyanasiyana a mtundu womwewo wa chitsulo cha alloy. Amadziwika ndi mphamvu zambiri komanso kulimba, zomwe zimagwiritsidwa ntchito kwambiri m'magwiritsidwe ntchito monga magiya ndi mabolts. AISI 4140 ndi dzina la ku America, 1.7225 ndi muyezo wa ku Europe wa EN, SCM440 ndi dzina la ku Japan la JIS, ndipo B7 imatanthauza kalasi yokwaniritsa zofunikira za ASTM A193. Maina awa akuyimira chitsulo cha alloy cha chromium-molybdenum chokhala ndi makhalidwe ofanana, ndipo kusankha kungadalire miyezo ya madera kapena mafakitale.
Mafotokozedwe a 4140 1.7225 42CrMo4 SCM440 B7:
| Giredi | 4140 1.7225 42CrMo4 SCM440 B7 |
| Muyezo | ASTM A29,ASTM A193 |
| pamwamba | Wakuda, Wosakhazikika, Wosasinthika |
| Makulidwe a m'mimba mwake | 1.0 ～ 300.0mm |
| Utali | Mamita 1 mpaka 6 |
| Kukonza | Yokokedwa ndi Yozizira & Yopukutidwa Yozizira, Yopanda Pansi & Yopukutidwa |
| Zinthu Zosaphika | POSCO, Baosteel, TISCO, Saky Steel, Outokumpu |
Makhalidwe ndi Ubwino:
•Mphamvu Yaikulu: Mipiringidzo yachitsulo iyi imakhala ndi mphamvu yokoka kwambiri, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pamene mphamvu ndi kulimba ndizofunikira.
•Kulimba: Amapereka kulimba kwabwino komanso kukana kugwedezeka, zomwe zimapangitsa kuti athe kupirira katundu wolemera komanso kupsinjika kwamphamvu.
•Kusinthasintha: AISI 4140, 1.7225, 42CrMo4, SCM440, ndi B7 ndi ma alloy ogwiritsidwa ntchito mosiyanasiyana oyenera kugwiritsidwa ntchito m'njira zosiyanasiyana, kuphatikizapo magiya, mabolts, shafts, ndi zida zomangira.
•Kukana Kuvala: Zinthu zomwe zimapanga alloy, monga chromium ndi molybdenum, zimathandiza kuti zitsulozi zisawonongeke, zomwe zimapangitsa kuti zitsulozi zikhale zoyenera kugwiritsidwa ntchito ngakhale zitakwezedwa.
•Kutha Kukonza: Zitsulo izi zimakhala ndi makina abwino zikatenthedwa bwino, zomwe zimathandiza kuti ntchito zokonza zigwire bwino ntchito popanga.
•Kutha kulumikiza: Zitha kulumikizidwa, ngakhale kuti kutentha kumafunika pasadakhale komanso kutenthedwa pambuyo pa kulumikiza kungafunike kuti zinthu zomwe mukufuna zisungidwe bwino ndikupewa mavuto monga kusweka.
Kapangidwe ka Mankhwala:
| Giredi | C | Mn | P | S | Si | Cr | Mo |
| 4140 | 0.38-0.43 | 0.75- 1.0 | 0.035 | 0.040 | 0.15-0.35 | 0.8-1.10 | 0.15-0.25 |
| 42CrMo4/ 1.7225 | 0.38-0.45 | 0.6-0.90 | 0.035 | 0.035 | 0.40 | 0.9-1.20 | 0.15-0.30 |
| SCM440 | 0.38-0.43 | 0.60-0.85 | 0.03 | 0.030 | 0.15-0.35 | 0.9-1.20 | 0.15-0.30 |
| B7 | 0.37-0.49 | 0.65-1.10 | 0.035 | 0.040 | 0.15-0.35 | 0.75-1.20 | 0.15-0.25 |
Kapangidwe ka makina:
| Giredi | Mphamvu Yokoka [MPa] | Yiled Strengtu [MPa] | Kutalikitsa % |
| 4140 | 655 | 415 | 25.7 |
| 1.7225/42CrMo4 | 1080 | 930 | 12 |
| SCM440 | 1080 | 930 | 17 |
| B7 | 125 | 105 | 16 |
Buku Lofunsa Mafunso Ofunsidwa Kawirikawiri:
Chifukwa Chiyani Sankhani Ife?
•Mukhoza kupeza zinthu zabwino kwambiri malinga ndi zomwe mukufuna pamtengo wotsika kwambiri.
•Timaperekanso mitengo yotumizira katundu (Reworks, FOB, CFR, CIF, ndi yotsika mtengo). Tikukulimbikitsani kuti mugule katundu woti mutumize katunduyo, zomwe zingakuthandizeni kukhala ndi ndalama zochepa.
•Zipangizo zomwe timapereka ndi zotsimikizika kwathunthu, kuyambira pa satifiketi yoyesera zinthu zopangira mpaka chiganizo chomaliza. (Malipoti adzawonetsedwa pakufunika)
•Tikutsimikizira kuti tipereka yankho mkati mwa maola 24 (nthawi zambiri mu ola lomwelo)
•Perekani lipoti la SGS TUV.
•Tadzipereka kwathunthu kwa makasitomala athu. Ngati sizingatheke kukwaniritsa zofunikira zanu mutafufuza njira zonse, sitidzakusokeretsani polonjeza zinthu zabodza zomwe zingapangitse ubale wabwino ndi makasitomala.
•Perekani chithandizo chokhazikika.
4140 vs 42CRMO4 – Kodi Kusiyana N'chiyani?
AISI 4140 ndi 42CrMo4 kwenikweni ndi mtundu womwewo wa chitsulo, pomwe AISI 4140 ndi dzina la ku America ndipo 42CrMo4 ndi dzina la ku Europe. Amagawana mankhwala ofanana, mphamvu zambiri, komanso kulimba, zomwe zimapangitsa kuti akhale oyenera kugwiritsidwa ntchito monga magiya ndi mabolts. Ngakhale kuti ali ndi mayina osiyanasiyana komanso miyezo yosiyanasiyana ya madera, nthawi zambiri amaonedwa kuti ndi osinthika chifukwa cha makhalidwe ofanana.
Kodi chitsulo cha 42CrMo4 n'chiyani?
42CrMo4 ndi chitsulo cha chromium-molybdenum alloy chomwe chimatchulidwa ndi European standard EN 10083. Chimadziwika ndi mphamvu zake zambiri, kulimba, komanso kulimba bwino. Ndi mpweya wokwanira wa 0.38% mpaka 0.45%, chimagwiritsidwa ntchito kwambiri pa ntchito zomwe zimafuna zida zolimba, monga magiya, ma crankshaft, ndi ndodo zolumikizira m'mafakitale monga magalimoto ndi ndege. Chitsulochi chimayankha bwino kutentha, zomwe zimapangitsa kuti chizitha kusintha mawonekedwe a makina, ndipo chimaonedwa kuti ndi chofanana ndi mayina ena monga AISI 4140 ndi SCM440.
Kodi chitsulo cha grade B7 n'chiyani?
Giredi B7 ndi mfundo zomwe zili mkati mwa muyezo wa ASTM A193, womwe umakhudza zipangizo zomangira zolimba kwambiri kuti zigwiritsidwe ntchito pa ntchito yotentha kwambiri kapena yopanikizika kwambiri. ASTM A193 ndi muyezo wopangidwa ndi ASTM International (yomwe kale inkadziwika kuti American Society for Testing and Materials) ndipo imagwiritsidwa ntchito kwambiri m'mafakitale opanga mafuta ndi gasi, petrochemical, ndi magetsi. Chitsulo cha Giredi B7 ndi chitsulo chopanda alloy chromium-molybdenum chomwe chimazimitsidwa ndikutenthedwa (chotenthedwa ndi kutentha) kuti chikwaniritse mawonekedwe a makina omwe mukufuna. Ndikofunikira kudziwa kuti chitsulo cha Giredi B7 nthawi zambiri chimagwiritsidwa ntchito limodzi ndi mtedza wa Giredi 2H kuti zitsimikizire kuti zikugwirizana komanso zikugwira ntchito bwino pakugwiritsa ntchito kofunikira. Zikafotokozedwa, zipangizo ziyenera kukwaniritsa zofunikira zomwe zafotokozedwa mu miyezo ya ASTM A193 ndi A194 kuti zitsimikizire mphamvu yoyenera, kusinthasintha, ndi mawonekedwe ena a makina.
Makasitomala Athu
Ndemanga Zochokera kwa Makasitomala Athu
Mipiringidzo yachitsulo ya AISI 4140, 1.7225, 42CrMo4, SCM440, ndi B7 imayankha bwino kutentha, zomwe zimapangitsa kuti makina azisintha monga kuuma ndi kulimba. Mipiringidzo yachitsulo iyi imakhala ndi mphamvu zambiri zokoka, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pomwe mphamvu ndi chinthu chofunikira kwambiri. Imapereka kulimba kwabwino komanso kukana kukhudza, zomwe zimapangitsa kuti ikhale yokhoza kupirira katundu wolemera komanso kupsinjika kwamphamvu. Mipiringidzo yachitsulo ndi yosinthasintha ndipo imagwiritsidwa ntchito m'mafakitale osiyanasiyana, kuphatikiza magalimoto, ndege, zomangamanga, ndi kupanga. Zinthu zophatikizika, monga chromium ndi molybdenum, zimathandiza kuti zitsulozi zisawonongeke bwino, zomwe zimapangitsa kuti zitsulozi zikhale zoyenera kugwiritsidwa ntchito zomwe zimakhudzidwa ndi zinthu zokwawa.
Kulongedza:
1. Kulongedza katundu ndikofunikira kwambiri makamaka pankhani yotumiza katundu kunja kwa dziko komwe katundu amadutsa m'njira zosiyanasiyana kuti akafike komwe akupita, choncho timaika chidwi chathu chachikulu pa kulongedza katundu.
2. Saky Steel amanyamula katundu wathu m'njira zosiyanasiyana kutengera zinthuzo. Timanyamula katundu wathu m'njira zosiyanasiyana, monga,
