### 1. Suav sib npaug ntawm Astm A36?
Qhov ze tshaj Suav sib npaug rau ASTM A36 yog ** GB / T 700 Q235B **.
* ** Ob qho tib si sib xws: ** Ob leeg yog cov qauv roj carbon uas muaj zog zoo sib xws (nyob ib ncig ntawm 235 MPa rau Q235b vs . 250 MPa rau A36). Lawv tau dav siv rau cov kev siv cov qauv txheej txheem dav dav xws li kev tsim cov thav ntawv, txuas hniav, thiab tshuab.
* ** Qhov sib txawv tseem ceeb: ** Lawv tsis yog qhov zoo tib yam. Thawj qhov sib txawv ntawm lawv cov tshuaj lom neeg muaj pes tsawg leeg tshuaj. A36 muaj cov ntsiab lus ntau rau carbon ntau raws li cov hlau tuab, thaum q235b muaj ntau cov pa roj carbon ntau. Tsis tas li ntawd, A36 suav nrog qhov xav tau rau cov ntsiab lus tsawg kawg rau cov tooj liab rau cov atmospheric corrosion, uas q235b tsis muaj. Yog li ntawd, rau cov ntawv thov tseem ceeb, lawv yuav tsum tsis txhob siv cov khoom sib pauv uas tsis muaj kev sab laj ntawm cov qauv tsim tshwj xeeb.
### 2. Dab tsi yog ovtm 29 4140 cov khoom siv?
ASTM Au 29 4140} yog qhov tshwj xeeb rau kub --} ua tiav cov kab hlau ua tiav. Qhov "4140" yog hais txog cov tshuaj lom neeg tshwj xeeb ib tus qauv AISI / SAE.
* ** Cov hom khoom: ** Nws yog ib qho nruab nrab - carbon, qis}}} alloy ultolo thiab molybdenum.
* ** Cov yam ntxwv tseem ceeb: ** Paub txog nws lub zog siab, kev ua kom zoo, thiab coj tau zoo heev. Nws tuaj yeem ua cua sov -} nrhiav (los ntawm quenching thiab tempering) kom ua tiav ntau yam ntawm lub zog thiab qib hardness.
* ** Cov npe nquag: ** Nws yog feem ntau hu rau ** Aisi 4140 ** lossis ** SAE 4140 **.
* ** Daim ntaub ntawv: ** Nws yog siv rau high - lub zog Cheebtsam xws li axles, cov zog, ntxaij, thiab kev pleev tshuaj, thiab txua.
### 3. Puas yog ATM A36 cov hlau roj carbon tsawg?
Yog lawm, ** AVTM A36 tau raug cais los ua cov roj carbon tsawg **.
Nws cov ntsiab lus carbon yog feem ntau ntawm 0.25-0.29% (feem ntau poob rau hauv cov qauv siv tsawg (feem ntau txog 0.30% carbon). Qhov no cov txiaj ntsig carbon tsawg no muab A36 nws cov kev tsim kho kom zoo thiab weldability.
### 4. Dab tsi yog astm rau cov roj av tsawg?
Tsis muaj ib qho "Astm rau cov hlau tsawg." Hloov chaw, Astm thoob ntiaj teb tshaj tawm ntau yam qauv uas tau them ntau yam ntawv thiab kev siv cov roj carbon steel. Qhov tseeb astm specification yog nyob ntawm daim ntawv foos (ntawv, lub phaj, bar, yeeb nkab, thiab lwm yam.
Qee qhov kev qhia txog ASTM feem ntau rau cov hlau tsis muaj roj muaj xws li:
* ** AVTM A36 / A36M: ** Rau cov qauv roj teeb hlau, hlau, thiab kab.
* ** ASTM A283 / A283m: ** Rau qis thiab nruab nrab tensile zog zog cov phiaj hlau, cov ntawv txheeb, thiab cov ntawv tuav.
* ** ASTM A573 / A573M: ** Rau kev txhim kho kev ua kom tawv tawv carbon cov hlau qauv.
* ** ASTM A500: ** Rau cov khoom siv hlau ua cov hlau hauv ntau yam duab.
* ** ASTM A513: ** Rau cov pa roj carbon thiab roj carbon monox sib dhos.
* ** ASTM A108: ** rau cov qauv cov khoom lag luam txheem cov roj carbon hlau ua kom zoo li 1018.
### 5. Puas yog 1018 tib yam li A36?
Tsis yog, ** 1018 thiab A36 tsis yog tib yam **, txawm hais tias lawv yog ob qho tib si qis carbon hlau. Qhov sib txawv tseem ceeb yog qhov lawv tau teev tseg.
* ** AISI 1018: ** Qhov no yog lub npe qib kawm los ntawm SAE / AISI system. Nws yog txhais tau tias feem ntau los ntawm ** ** Feem ntau cov tshuaj sib xyaw me me "(tshwj xeeb tshaj yog cov pa roj carbon: 0.15- 0.20%). Nws cov khoom siv neeg tuaj yeem sib txawv raws li kev tsim khoom (piv txwv li, txias- Kos duab).
* ** AVTM A36: ** Qhov no yog ASTM txuj kev qhia meej. Nws yog txhais tau tias feem ntau los ntawm ** cov cuab yeej siv yam tsawg kawg nkaus ** (tshwj xeeb tshaj yog cov zog). Nws cov tshuaj lom neeg raug tso cai sib txawv ntau dav ntau npaum li qhov xav tau muaj zog, khoov, thiab lwm yam kev ntsuas tshuab tau ntsib.
** Hauv cov ntsiab lus: ** Yog tias koj xav tau daim hlau uas sib ntsib ua kom muaj zog ua kom muaj zog lossis lub tshuab ntsuas hluav taws xob tsawg kawg), zoo li lub nqaj nqaj), koj qhia A36. Qhov kub - rolled 1018 bar tuaj yeem ua tau raws li A36 qhov yuav tsum tau ua tiav, tab sis lawv tsis tuaj yeem lav kom sib npaug.
