Standards, Specifications thiab Standard Sizes Stainless hlau Bolts

Kev siv dav thiab qhov tseem ceeb ntawm stainless hlau bolts lawv tus kheej ua pov thawj. Lawv suav nrog ntau qhov feem ntau hauv kev lag luam ntsia liaj qhov rooj, yog li kev tsim thiab kev ua raws li cov qauv ntawm stainless hlau ntsia liaj qhov rooj yog qhov tseem ceeb. Kab lus no yuav nthuav dav cov qauv tsim, cov lus qhia tshwj xeeb thiab cov qauv loj ntawm stainless hlau bolts los muab kev siv rau kev siv tswv yim.

I. Cov Qauv rau Stainless Hlau Bolts

Cov qauv rau stainless hlau bolts tuaj yeem xa mus rau cov pa roj carbon steel bolts, thiab tshwj xeeb yuav tsum tau ua raws li cov qauv hauv tebchaws thiab cov qauv thoob ntiaj teb. Ntawm lawv, raws li lub teb chaws tus qauv (xws li GB / T 6170-2015 "Hexagon Nuts, Style 1" thiab GB / T 5782-2016 "Hexagon Head Bolts, Tag Nrho Xov"), cov cuab yeej cuab tam qib code rau stainless hlau bolts thiab txiv ntseej yog tsuas yog: A2-70 (0018) thiab A2-70 (xws li cov khoom siv 0Cr17Ni12Mo2).

Nco tseg: Cov versions dhau los GB/T 6170-2000 thiab GB/T 5782-2000 hauv cov ntawv qub tau raug hloov kho rau cov ntawv tshiab, uas tau kho ntawm no kom paub meej lub sijhawm ntawm cov qauv; "0r18Ni9" yog typo thiab kho rau "0Cr18Ni9".

II. Standard Sizes thiab Relevant Specifications ntawm Stainless Hlau Bolts

(I) Specifications ntawmHigh-strength Stainless hlau boltsrau Steel Structures

High-strength bolts siv rau steel qauv pob qij txha npog ob hom quenched thiab tempered alloy steels, uas yog haum rau loj hexagon bolts rau structural siv, nrog ib tug tensile zog ntawm 1040-1210 megapascals (MPa).

Lub koom haum American ntawm Steel Kev Tsim Kho (pom zoo los ntawm Pawg Neeg Tshawb Fawb) tau hais tias ASTM A325 thiab ASTM A490 series loj hexagon bolts tuaj yeem siv rau kev sib txuas steel qauv. Xws li bolts tshwj xeeb yog siv rau steel qauv kev sib txuas scenarios, nrog rau txoj kab uas hla txoj kab uas hla ntawm M12-M36. Lawv hom thiab tshuaj lom neeg muaj pes tsawg leeg tau teev tseg raws li hauv qab no: Hom 1 yog nruab nrab carbon alloy steel, thiab cov lus qhia no siv rau ASTM A325 thiab ASTM A490 loj hexagon bolts tau txais los ntawm Pawg Neeg Tshawb Fawb hauv nws cov qauv kev qhia tshwj xeeb.

Nws yuav tsum tau muab sau tseg tias tus qauv no siv imperial / phaus raws li tib lub ntsuas ntsuas thiab tsis suav nrog lwm cov ntsuas ntsuas; tus qauv no tsis yog tsim los daws txhua yam teeb meem ntsig txog kev nyab xeeb muaj peev xwm (yog tias muaj). Cov neeg siv yog lub luag haujlwm rau kev txiav txim siab txog kev siv tau thiab kev txwv ntawm tus qauv no hauv kev tsim kom muaj kev nyab xeeb thiab kev noj qab haus huv tsim nyog ua ntej siv.

(II) ASTM Standard Specifications

1. ASTM A325 Standard: Thaum tshav kub kub-kho siab-lub zog bolts rau steel qauv, nrog ib tug tsawg kawg nkaus tensile zog ntawm 120/105 kilopounds ib square inch (ksi).

2. ASTM A490 Standard: High-strength bolts sib haum mus rau lub zog qib 10.9, haum rau steel qauv kev sib txuas.

3. ASTM A563M Txuj: "Carbon thiab Alloy Steel Ceev (Metric)". Cov txiv ntseej uas ua tau raws li qhov tshwj xeeb no yuav tsum tau siv nrog ASTM A490M lojhexagon ntsia liaj qhov rooj specification. Cov kev xav tau ntawm qib sib txawv rau cov txiv ntseej saum npoo tiav yuav tsum txiav txim siab txog qib txiv ntoo thiab kev kho deg specification raws li hom ntsia liaj qhov rooj thiab txoj kev kho saum npoo.

(III) Cov Khoom Siv thiab Kev Ntsuas Kev Ua Haujlwm

Alloy steels tau ntawv pov thawj los ntawm American Iron thiab Steel lub koom haum raug cais raws li cov qauv alloy steels yog tias lawv cov ntsiab lus alloy muaj ntau tshaj ib qho ntawm cov kab hauv qab no lossis muaj cov ntsiab lus tshwj xeeb nrog cov ntsiab lus tsawg kawg nkaus: manganese Tsawg dua lossis sib npaug li 1.65%, tooj liab tsawg dua lossis sib npaug li 0.60%, silicon Tsawg dua lossis sib npaug li 0.60%; los yog txhuas, chromium Tsawg dua los yog sib npaug li 3.99%, nrog rau lwm yam hlau alloy xws li cobalt, niobium, molybdenum, npib tsib xee, titanium, tungsten, vanadium, zirconium ntxiv kom ua tiav cov nyhuv alloying.

Rau bolts nrog ib txoj kab uas hla tsawg dua M24, lawv qhov ntev yog 21.4D rau 2D (D yog lub taub hau taub hau). Cov bolts zoo li no yuav tsum tau mus rau qhov ntsuas qhov ntsuas axial tensile, thiab cov txiaj ntsig kev xeem yuav tsum ua kom tau raws li qhov tsawg kawg nkaus tensile load, pov thawj load lossis lwm cov ntaub ntawv pov thawj uas yuav tsum tau teev tseg hauv Table 4.

Bolts nrog txoj kab uas hla tsawg dua M24 thiab qhov ntev luv dua 2D yuav tsum tau kuaj axial tensile raws li hardness. Tom qab ua tiav qhov kev sim hardness thiab tensile xeem ntawm lub bolts raws li xav tau, sau thawj qhov tshwm sim ntawm qhov tsawg kawg nkaus hardness nyeem. Lub hom phiaj ntawm qhov kev ntsuam xyuas no yog txhawm rau txhim kho cov txheej txheem ntawm cov ntsia liaj qhov rooj thiab txhim kho qhov ua tau zoo thiab kev pabcuam ntawm cov hlau tsis muaj steel bolts los ntawm kev kuaj xyuas cov decarburization nyob ze ntawm qhov chaw (ua tiav decarburization thiab tsis tiav decarburization) thiab core hardness.

III. Cov ntsiab lus

Nyob rau hauv cov ntsiab lus, kev tsim thiab nruj ua raws li cov qauv stainless hlau ntsia liaj qhov rooj yog tus yuam sij rau kev ua kom zoo thiab kev ua tau zoo ntawm stainless hlau bolts, thiab tseem yog ib qho tseem ceeb ua ntej kom ntseeg tau tias kev nyab xeeb ntawm kev siv thiab kev ua haujlwm ruaj khov ntawm kev lag luam. Yog li ntawd, kev tshawb fawb, kev txawj ntse thiab nruj me ntsis siv cov qauv thiab cov lus qhia tshwj xeeb yog ib txoj haujlwm tseem ceeb rau cov tuam txhab lag luam thiab cov koom haum cuam tshuam, txhawm rau muab cov neeg siv khoom zoo dua thiab txhim khu kev qha stainless hlau ntsia liaj qhov rooj.