Steel Bar 4140 vs 4130 vs 4340: Txhua Yam Koj Yuav Tsum Paub?

Thaum nws los txog rau xaiv txoj cai alloy steel bar rau mechanical, aerospace, lossis industrial applications, peb lub npe feem ntau tuaj rau pem hauv ntej -4 140, 4 130, thiabib 4340. Cov hlau tsis tshua muaj chromium-molybdenum no muaj npe nrov rau lawv lub zog, toughness, thiab machinability. Tab sis ua li cas koj thiaj paub tias qhov twg yog qhov haum rau koj qhov project?

Hauv phau ntawv qhia dav dav no, peb sib piv4140 vs 4130 vs 4340 steel tuavhla cov kev ntsuas tseem ceeb xws li tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab, hardness, weldability, kev kho cua sov, thiab daim ntawv thov tsim nyog - pab engineers, fabricators, thiab buyers ua cov ntaub ntawv txiav txim siab.

1. Taw qhia rau 4140, 4130, thiab 4340 Steel Bars

1.1 Cov hlau tsis tshua muaj hlau yog dab tsi?

Cov hlau tsis tshua muaj hlau yog cov hlau uas muaj cov hlau me me xws li chromium (Cr), molybdenum (Mo), thiab npib tsib xee (Ni) los txhim kho cov khoom tshwj xeeb.

1.2 Txheej txheem cej luam ntawm Txhua Qib

• 4 140 steel: Muaj ntau yam hlau uas muab lub zog zoo thiab tawv tawv, dav siv hauv kev tsim cov cuab yeej, cov khoom siv tsheb, thiab kev tsim vaj tsev dav dav.

• 4 130 steel: Paub txog nws lub siab toughness thiab weldability, feem ntau siv nyob rau hauv aviation thiab motorsports.

• 4 340 steel: Ib qho nickel-chromium-molybdenum alloy nrog ultra-siab zog thiab qaug zog tsis kam, nyiam rau aerospace thiab kev siv hnyav.

2. Kev sib piv tshuaj lom neeg

Cov Lus Cim Tseem Ceeb:

• ib 4340tau ntxivnpib tsib xee, muab nws dua toughness thiab qaug zog kuj.

• 4 130muaj qis carbon cov ntsiab lus, kev txhim khoweldability.

• 4 140muaj ntau dua carbon thiab manganese, boostinghardness thiab lub zog.

3. Mechanical Properties Comparison

4. Kev kho cua sov thiab hardenability

4 130

• normalizingKub: 870-900 ° C

• Hardening: Roj quench los ntawm 870 ° C

• TemperingKub: 480-650 ° C

• Zoo tshaj rau: Cov ntawv thov xav tauweldabilitythiabtawv

4 140

• Hardening: Roj quench ntawm 840-875 ° C

• TemperingKub: 540-680 ° C

• Hardenability: Zoo heev - cov ntaub ntawv sib sib zog nqus hardening tiav

• Zoo tshaj rau: High-strength shafts, iav, crankshafts

ib 4340

• Hardening: Roj los yog polymer quench los ntawm 830-870 ° C

• TemperingKub: 400-600 ° C

• Tseem ceeb: Khaws lub zog txawm tias tom qab sib sib zog nqus hardening

• Zoo tshaj rau: Lub dav hlau tsaws iav, hnyav-duty tsav Cheebtsam

5. Weldability thiab Machinability

4 130sawv tawm rau kev ua tau yooj yim weldable siv TIG / MIG yam tsis muaj kev tawg ntau dhau, zoo tagnrho rau cov qauv tubing zoo li yob tawb lossis dav hlau thav ntawv.

6. Daim ntawv thov los ntawm Kev Lag Luam

6.1 4130 Kev Siv Hlau

• Aerospace tubing

• Sib tw thav duab thiab yob tawb

• Cov tsheb kauj vab

• Phom phom txais

6.2 4140 Kev Siv Hlau

• Cov cuab yeej tuav

• Crankshafts

• Gears

• Axles thiab shafts

6.3 4340 Kev Siv Hlau

• Lub dav hlau tsaws iav

• High-strength bolts thiab fasteners

• Heavy machinery Cheebtsam

• Roj thiab roj kev lag luam shafts

7. Kev txiav txim siab nqi

Vim nwscov ntsiab lus nickel, 4340 yog qhov kim tshaj plaws. Txawm li cas los xij, nws qhov kev ua tau zoo hauv kev thov cov ntawv thov feem ntau ua pov thawj tus nqi.

8. International Standards thiab Designations

Xyuas kom koj tus neeg muag khoom steel muab daim ntawv pov thawj zeb xeem uas ua raws li cov qauv tsim nyog xws liASTM A29, TS EN 10250, los yogJIS G4053.

9. Yuav ua li cas xaiv txoj cai Steel Bar

10. Cov lus xaus

Hauv kev sib tw ntawmHlau Bar 4140 vs 4130 vs 4340, tsis muaj ib qho loj-haum-tag nrho cov yeej - txoj cai xaiv nyob ntawm kojkev ua tau zoo, lub zog, nqi, thiab kev xav tau vuam.

• Xaiv4 130yog tias koj xav tau weldability zoo heev thiab lub zog nruab nrab.

• Mus nrog4 140rau lub zog siab, tus nqi tsim nyog rau kev xaiv shafts thiab gears.

• Xaivib 4340thaum muaj zog heev, qaug zog, thiab poob siab kuj tseem ceeb heev.