Alloy thiab Temper Fundamentals
2024 yog tooj liab -cov kabmob 2xxx alloy, cov tshuaj kho cua sov kho thiab ib txwm muaj hnub nyoog rau T4 tsev neeg ntawm tempers. Nyob rau hauv cov txheej txheem nws yog xaiv rau siab zoo li qub zog thiab zoo qaug zog tsis kam es rau corrosion kuj, uas yog vim li cas clad khoom los yog ib tug tiv thaiv tiav yog feem ntau teev nyob rau hauv cov chaw raug. Kev yuav khoom yog feem ntau ua rau ASTM B211 / B211M rau dov lossis txias -tiav bar, pas nrig thiab hlau, thiab rau ASTM B221 / B221M rau extruded bar thiab pas nrig; Cov qhab nia sib npaug hauv teb chaws tshwm sim hauv GB / T 3191 thiab JIS H4040.
Cov ntawv sau npe muaj pes tsawg leeg yog lub hauv paus rau kev txheeb xyuas tuaj: tooj liab 3.8-4.9%, magnesium 1.2-1.8%, manganese 0.30-0.9%, hlau 0.50% max, silicon 0.50% max, chromium 0.10% max, zinc max 0.25% tanium% max. Cov ntsiab lus tooj liab hauv qab qhov ntau txo qis zog; ib tug manganese cov ntsiab lus saum toj no nws txo ductility nyob rau hauv nyias seem.
Temper Selection los ntawm Kev Nyuaj Siab
T351 xaiv cov tshuaj kho cua sov ua raws li kev tswj kev ncab kom txo tau cov kev ntxhov siab sab hauv, tsis muaj kev laus. Nws muab kev sib xyaw ua ke zoo tshaj plaws ntawm lub zog thiab kev puas tsuaj rau kev ua siab ntev thiab yog qhov kev xaiv ib txwm rau cov khoom siv thiab cov tav uas distortion tom qab machining yuav tsum nyob qis. T851 ntxiv dag zog rau kev laus tom qab ncab thiab nce lub zog ntawm tus nqi me me hauv kev puas tsuaj, uas haum rau cov khoom siv thauj khoom feem ntau hauv compression thiab shear.
| Kub | Hom tensile zog | Hom yield zog | Hom kev siv |
|---|---|---|---|
| 2024-T351 | txog 470 MPa | txog 325 MPa | Machined thav duab, tav, tis Cheebtsam |
| 2024-T851 | txog 480 MPa | txog 450 MPa | Fittings, siab -compression qhov chaw |
| 2024-T4 | txog 470 MPa | txog 325 MPa | General structural bar, tsis tshua muaj kev ntxhov siab nyem thov |
Cov nqi saum toj no yog cov ntaub ntawv tshaj tawm rau cov tempers, tsis lav qhov tsawg kawg nkaus; kev lees txais yuav tsum tawm tsam qhov tsawg kawg nkaus ntawm cov khoom siv hauv cov khoom siv tshwj xeeb rau daim ntawv xaj thiab qhov loj me.
Machining thiab Fabrication Cwj Pwm
2024 cov tshuab ua kom tiav zoo heev thiab tuav lub siab ntev zoo thaum cov khoom lag luam muaj kev ntxhov siab- tau txais kev cawmdim los ntawm kev ncab thiab thaum txiav yog sib npaug ntawm qhov nruab nrab axis. Kev pheej hmoo ntawm kev puas tsuaj nce siab hauv cov webs nyias thiab ntev, tsis muaj kev txhawb nqa. Lub alloy tsis pom zoo rau welded los ua ke; riveting thiab bolting yog cov kev sib koom ua ke ib txwm, thiab qhov yuav tsum tau deburred kom txwv tsis pub qaug zog pib.
Kev kho cua sov, qhov uas tau ua nyob rau hauv - tsev, ua raws AMS 2772 rau cov khoom siv raw lossis AMS 2770 rau cov khoom tiav, ob qho tib si uas tswj lub qhov cub sib xws thiab quench qeeb. Quench ncua yog ib qho ua rau ntau qhov tsis lees paub, vim tias nws hloov pauv lub zog thiab kev ntxhov siab.
Kev tshuaj xyuas, Traceability thiab cov ntaub ntawv
Aerospace bar Tshuag yog yuav nrog ntawv pov thawj uas txuas cov xov tooj cua sov rau chemistry, mechanical results and, where specification, ultrasonic or penetrant exam. Kev kuaj thiab ntsuas cov tshuab feem ntau tau teeb tsa rau AMS 2355. Cov nplej ntws hauv bar tau kuaj xyuas ntawm macro- ntu ntu rau cov khoom siv los ntawm qhov chaw, vim tias cov nplej kawg raug rau ntawm lub ntsej muag yog qhov tsis lees paub.
Cov neeg yuav khoom yuav tsum kho peb yam khoom hauv daim ntawv xaj: cov khoom siv tshwj xeeb thiab kev kho dua tshiab, kev kub ntxhov nrog kev ntxhov siab - kev xav tau kev pab, thiab chav kuaj xyuas nrog cov qauv zaus. Tawm hauv kev npau taws lossis kev soj ntsuam hauv chav kawm tsis tau teev tseg yog vim li cas ib txwm muaj rau kev xa khoom raws li qhov yuav tsum tau muaj tab sis tsis tuaj yeem tso tawm rau daim duab.
Cov lus nug nquag
Q:Puas yog 2024-T351 lossis 2024-T851 zoo dua rau lub tshuab ua haujlwm?
A: T351 feem ntau yog qhov zoo dua vim tias nws yog kev ntxhov siab-relieved los ntawm stretching thiab tshuab nrog tsawg distortion; T851 yog xaiv qhov twg muaj zog tawm los ntau dua yog qhov yuav tsum tau ua.
Q:Dab tsi yog qhov txwv ntawm 2024?
A: tooj liab 3.8-4.9%, magnesium 1.2-1.8%, manganese 0.30-0.9%, nrog hlau thiab silicon txhua 0.50% max thiab chromium 0.10% max.
Q:Dab tsi specifications npog 2024 bar?
A: ASTM B211 / B211M rau dov los yog txias - tiav bar, pas nrig thiab hlau, thiab ASTM B221 / B221M rau extruded bar thiab pas nrig, nrog GB / T 3191 thiab JIS H4040 raws li sib npaug hauv teb chaws cov ntaub ntawv.
Q:2024 puas tuaj yeem welded?
A: Nws tsis yog ib txwm welded vim kub tawg thiab poob ntawm cov khoom; riveted los yog bolted pob qij txha yog siv xwb.
Q:Vim li cas quench ncua kev tswj?
A: Kev ncua ntev ntawm kev daws teeb meem thiab quenching txo lub zog thiab tawm ntawm qhov kev ntxhov siab, thiab nws yog ib qho ua rau tsis lees paub ntau ntau.
Q:Yuav ua li cas zoo nyob rau hauv kev soj ntsuam nyob rau hauv tuab bar?
A: Los ntawm kev soj ntsuam ultrasonic, nrog rau cov qauv thiab kev lees paub tau teev nyob rau hauv qhov kev txiav txim yuav khoom thiab traceable rau tus naj npawb cua sov.