Qib 12.9 Cov Khoom Siv Ntsia Liaj Ntsig

Muaj peb cov ntaub ntawv tseem ceeb rau qib 12.9 Bolts (12.9 Npoo Thauj Tog Rau Nkoj, 12.9 los ntawm Bolt): Cov pa roj carbon hlau npoo thauj tog rau nkoj, hlau stainless hlau, thiab tooj liab.

(1) Cov hlau roj carbon (xws liCov pa roj carbon steel hlau hluav taws xob bolts). Peb paub qhov txawv ntawm cov hlau, nruab nrab cov roj av hlau, cov roj carbon hlau thiab cov hlau sib tw ua ke raws li cov khoom siv roj carbon hlau.

1. Cov pa roj carbon tsawg nrog C% <0.25% feem ntau hu ua A3 steel nyob hauv Suav teb. Txawv tebchaws, lawv tau hu ua 1008, 1015, 1018, 1022, thiab lwm yam.

2. Nruab nruab nrab ntawm cov roj carbon hlau 0.25%

Alloy Hlau: Ntxiv cov ntsiab tagnrho cov hlau ua kom nce qee cov khoom tshwj xeeb ntawm cov hlau: xws li 35, 40 chromium nyiaj, scm435

3. 10B38. Fangsheng screws tsuas yog siv scm435 chromium-platinum alloy steel, uas nws lub chaw tseem ceeb yog C, yog, MN, P, S, thiab MO.

(2) Stainless hlau (xws li Stainless Hlau Threaded Rods). Qib Kawm Qib: 45, 50, 60, 70, tsuas yog Austenite (18% cr, 8% ni), muaj hluav taws kub tiv taus zoo

Zoo corrosion tsis kam thiab weldability zoo. A1, A4, A4 Martensite thiab 13% CR muaj kev tsis zoo corrosion tsis kam, siab lub zog thiab kev coj zoo. C1, c

2. C4 ferritic stainless hlau. 18% CR muaj kev zam txim zoo dua thiab muaj zog corrosion tsis txawv dua li martensite. Tam sim no, cov ntaub ntawv txawv teb rau ntawm kev ua lag luam yog ua rau Nyiv.

Saj. Raws li qib, nws tsuas yog muab faib ua Sus302, Sus304 thiab sus316.

3) Tooj liab. Cov khoom siv uas nquag siv yog tooj dag ... Zinc-Coploy. H62, H65, thiab H68 tooj liab tsuas yog siv ua cov txheem txheem hauv khw.

12.9 Cov cawv ntawm ntau yam hauv cov khoom siv hauv cov khoom siv ntawm cov hlau:

1. Cov pa roj carbon (c): txhim kho lub zog ntawm cov steel seem, tshwj xeeb tshaj yog cov khoom siv cua sov, tab sis raws li cov yas ua kom muaj zog ntxiv, cov plastonity txo qis

Thiab nws yuav cuam tshuam rau lub txias vuam kev ua tau zoo thiab vuam kev ua haujlwm ntawm cov hlau seem.

2. Manganese (MN): txhim kho lub zog ntawm cov steel seem thiab txhim kho cov kev nyuaj rau qee yam. Uas yog hais, kev siv ntawm kev nkag mus nyuaj yog nce thaum muaj hluav taws.

Nws tseem tuaj yeem txhim kho cov chaw nyob zoo, tab sis ntau manganese yog kev cuam tshuam rau kev ua kom nruj thiab weldability. Thiab nws yuav cuam tshuam rau kev tswj ntawm cov txheej thaum lub sijhawm electroplating.

3. Npib (NI): txhim kho lub zog ntawm cov steel seem, txhim kho kev ua kom muaj zog ntawm cov tshuab hluav taws xob, thiab ua kom muaj zog kho cua sov

Cov nyhuv kho yog kom txo cov nyhuv ntawm hydrogen embrittlement.

4. Chromium (CR): Nws tuaj yeem txhim kho cov kev hnav tsis kam, txhim kho corrosion tsis kam, thiab pab muaj lub zog ntawm cov kub.

5. (MO): Nws tuaj yeem pab tswj cov khoom lag luam, txo cov rhiab ntawm cov hlau mus rau kev txhim kho lub zog ntawm lub zog ntawm cov kub.

Kev cuam tshuam loj.

6. Boron (b): Nws tuaj yeem txhim kho cov tawv nqaij tawv thiab pab ua cov roj carbon cov hlau tsim cov kev xav tau kev kho cua sov.

7. Alum (v): Ua kom tau txais avustenite nplej thiab txhim kho kev nruj

8. Silicon (Si): ua kom lub zog ntawm cov hlau seem. Cov ntsiab lus tsim nyog tuaj yeem txhim kho cov plasticity thiab tawv ntawm cov hlau seem.

35Cro steel yog cov khoom zoo rau cav qib 129 txuas tau Rod Bolts thiab tuaj yeem ntsib cov khoom siv neeg ua haujlwm ntawm Qib 12.9 pob ntsia liaj qhov rooj.

Nws yog qhov ua tau txheej txheem los txais yuav Nitrogen tiv thaiv kev kub ntxhov rau 12.9 xov tooj thiab cua txias tom qab kev kho cua sov, thiab tuaj yeem tsim tawm

Tsim cov txiaj ntsig zoo, siab-precision bolts

Cov kawm qib uas tau siv rau cov qauv hlau sib txuas tau muab faib ua ntau dua 3.6, 4.6, 8.8, 9.9, thiab 12.9.

Ntawm lawv, bolts ntawm qib 8.8 thiab siab dua yog ua los ntawm cov roj carbon alloy steel lossis tau kho cua sov (quenched

Tus so yog feem ntau hu ua bolts dog dig. Qhov Bolt Cov Ntawv Cim Qib Qib muaj ob ntu ntawm cov lej, uas sawv cev rau nominal tensile muaj zog ntawm cov khoom siv ntsia liaj qhov rooj thiab cov

Yield-muaj zog piv. Piv txwv li, ib lub ntsia liaj qhov rooj nrog qib kev ua tau zoo 4.6 txhais tau tias:

1. Lub hnubinal tensile lub zog ntawm cov khoom siv ntsia liaj qhov rooj nce mus txog 400MPA;

Cov txiaj ntsig lub zog piv ntawm cov khoom siv ntsia liaj qhov rooj yog 0.6:

2. Lub nominal xa lub zog ntawm cov khoom siv ntsia liaj qhov rooj mus txog 400 × 0.6 = Qib 24.9 High-dag zog. Cov khoom siv tau raug rhuab

3. Tom qab ua, nws tuaj yeem ua tiav:

1. Cov khoom siv ntsia liaj qhov rooj muaj ib qho nominal tensile lub zog ntawm 1000mpa.

2. Cov txiaj ntsig-rau-lub zog piv ntawm cov khoom siv ntsia liaj qhov rooj yog 0.9:

3. Lub nominal xa lub zog ntawm cov khoom siv ntsia liaj qhov rooj mus txog 1000 × 0.9 = 900MPA qib

10.9 Cov Screws yuav tsum tau nruab nrab carbon alloy steel quenching thiab tempering cua sov, xws li 35crmo 40dr thiab lwm yam ntaub ntawv

Lub ntsia liaj qhov rooj soj ntsuam qib bolt yog lub zog tensile ntawm cov ntsia liaj qhov rooj. Nws tsis't Tshuav dab tsi cov khoom siv yog, dab tsi's Qhov tseem ceeb yog qhov ntsuas neeg kho tshuab xws li lub zog tensile