Kev soj ntsuam cov ntsiab lus ntawm fasteners

Fasteners, tseem hu ua cov qauv hauv kev ua lag luam, yog cov ntsiab lus dav dav rau ib hom kev siv tshuab siv los txuas ob lossis ntau qhov chaw (lossis cov khoom siv) rau hauv tag nrho. Lawv hu ua "industrial meters" thiab muaj kev siv dav hauv kev lag luam xws li tshuab, khoom siv, tsheb, nkoj, kev tsheb ciav hlau, txuas hniav, vaj tse, cov qauv, cov cuab yeej, cov cuab yeej, cov cuab yeej, thiab cov khoom siv.

Cov khoom soj ntsuam ntawm cov fasteners muaj xws li: qhov loj me, tshuaj muaj pes tsawg leeg, kev kuaj tsis muaj kev puas tsuaj, cov khoom siv kho tshuab nrog rau kev sib txuas ntawm lub bolt coefficient ntawm torsion, nruj axial quab yuam, tensile (yield zog, tensile zog), hardness, thiab mechanical zog kuaj ntawm steel qauv fasteners

Cov qib kev ua tau zoo ntawmbolts rau steel structuralkoom yog 4.6, 4.8, 6.8, 8.8,10.9, 12.9 Nws, thiab lwm yam. Cov bolts ntawm qib 8.8 thiab saum toj no tau txais kev txhawb nqa los ntawm cov hlau tsis tshua muaj carbon hlau lossis cov pa roj carbon nruab nrab thiab kev kho cua sov, uas feem ntau hu uamuaj zog bolts, thiab tus so yog feem ntau hu ua dog dig bolts

Kev soj ntsuam cov ntsiab lus ntawm fasteners

1. Pom qhov ntev: xov mus / tsis mus gauge, nto roughness, ntau qhov ntev xws li txoj kab uas hla loj, pitch inch, me txoj kab uas hla, lub kaum sab xis profile, suab, thiab lwm yam.

2. Kev ntsuas kev ua haujlwm: tensile test, tuav test, hardness test, re tempering test, impact test, wedge load test, shear test, fatigue test, locking performance, torque coefficient, tightening axial force, friction coefficient, anti slip coefficient, screwability test, gasket elasticity, toughness test, hydrogen test, etc.

3. Tshuaj muaj pes tsawg leeg tsom xam: fastener tshuaj muaj pes tsawg leeg tsom xam, fastener hlau cov ntaub ntawv qib qhia, thiab lwm yam.

4. Metallographic tsom xam: microstructure, qhov tob ntawm decarburization txheej, qhov tob ntawm carburization txheej, grain loj ntsuam xyuas, cov ntsiab lus suav nrog, macrostructure, thiab lwm yam.

5. Kev soj ntsuam tsis ua haujlwm: kev soj ntsuam tawg, kev tsom xam pob txha, kev txheeb xyuas pob txha, thiab lwm yam.

6. Corrosion resistance test: neutral ntsev spray test (NSS), acetate spray test (AASS), copper accelerated acetate spray test (CASS)