Raws li cov fasteners tseem ceeb hauv kev tsim kho, kev tsim khoom, thiab kev txij nkawm txhua hnub, thiab niaj hnub kho ncaj qha cuam tshuam ncaj ncees kev nyab xeeb kev nyab xeeb thiab ua haujlwm. Txhawm rau kom muaj cov ntsia hlau zoo ib yam, cov teb chaws tau tsim cov qauv siv nruj, kom pom tseeb cov ntaub ntawv, thiab cov khoom siv neeg kho mob.
Kev siv nyiaj thoob ntiaj teb, Ntsia Hlau siv feem ntau ntawm ISO (cov koom haum thoob ntiaj teb rau kev ntsuas) thiab ANTM (American Society for Testing thiab cov ntaub ntawv). Piv txwv li, ISO 1481 specifies tances rau kev ua kom zoo nkauj {2} Lub taub hau taub rau kev sib cav, xav tau ntau dua ± 0.1mm kom paub meej tias kev txhawb nqa nrog cov ntaub ntawv txhawb nqa. ASTM F1667, ntawm qhov tod tes, tshwj xeeb txhais lub zog tensile, thiab corrosion rillions kom nyob twj ywm rust {} PUB DAWB rau tsawg kawg 500 teev nyob rau hauv cov tshuaj ntsev pov tseg.
Kuv lub teb chaws tus ntsia hlau ntsia hlau feem ntau yog nce raws GB (Lub Tebchaws). Piv txwv li, GB / T 349-2016, "dog dig round cov ntsia hlau yuav tsum tau tswj hwm ntawm 0.08% kom ua tiav qhov sib npaug ntawm kev nyuaj thiab tawv. Tsis tas li ntawd, GB / T 15824-202 teev tshwj xeeb cov kev xav tau ntawm cov ntsia hlau kom ntseeg tau tias txhim kho kev txhim kho hauv cov pob zeb lossis ntoo.
Kev siv cov qauv no tsis tsuas yog cov txheej txheem ntau lawm tab sis kuj txhawb thev naus laus zis thev naus laus zis hauv kev lag luam. Los ntawm kev xeem neeg kho mob thiab ntaus pob ncaws pob, cov tuam txhab tuaj yeem tswj hwm lub hardness gradient thiab kev kho kom zoo ntawm cov ntsia hlau. Rau cov neeg siv, ntsia hlau uas ua tau raws li cov qauv no txo qis kev pheej hmoo ntawm cov kev pheej hmoo ntawm cov kev ua tsis tiav thiab txuas ntxiv lawv lub neej pabcuam. Nyob rau hauv lub neej yav tom ntej, nrog kev nce qib hauv cov qauv kev tshawb fawb, cov qauv ntsia hlau yuav ua tau zoo los ua tau raws li cov kev xav tau ntawm cov tsev ntsuab thiab siab} Lub zog engineering cov dej num.