Inspection content of fasteners

Mafasteners, anozivikanwawo seakajairwa zvikamu pamusika, izwi rakajairwa remhando yezvikamu zvemakanika zvinoshandiswa kubatanidza zvakachengeteka zvikamu zviviri kana kupfuura (kana zvikamu) mune yakazara. Vanodaidzwa kuti "maindasitiri emamita" uye vane mashandisirwo akafara muminda yakadai semichina, zvishandiso, mota, ngarava, njanji, mabhiriji, zvivakwa, zvivakwa, maturusi, zviridzwa, zviridzwa, uye zvekushandisa.

Zvinhu zvekuongorora zvemafasteners zvinosanganisira: saizi, kuumbwa kwemakemikari, kusingaparadze kuyedzwa, michina zvivakwa zvinosanganisira bhaudhi yekubatanidza coefficient ye torsion, kuomesa axial simba, tensile (kuburitsa simba, kusimba kwesimba), kuomarara, uye mechaniki zvivakwa kuyedza zvigadziriso zvesimbi.

Iwo ekuita mamakisi emabhaudhi esimbi structuralkujoina vari 4.6, 4.8, 6.8, 8.8,10.9, 12.9, etc. Mabhaudhi egiredhi 8.8 uye pamusoro anotsigirwa nesimbi yakaderera-kabhoni alloy kana yepakati kabhoni simbi uye kupisa inorapwa, iyo inowanzonzi.mabhaudhi akasimba, uye mamwe ose anowanzonzi mabhaudhiwo

Inspection content of fasteners

1. Zvimiro zvekuonekwa: thread go/no go gauge, kushata kwepamusoro, zviyero zvakasiyana-siyana zvakadai sedhayamita huru, dhayamita yepitch, dhayamita diki, profile angle, pitch, nezvimwewo.

2. Mechanical performance test: tensile test, hold test, hardness test, re tempering test, impact test, wedge load test, shear test, kuneta bvunzo, kukiya kuita, torque coefficient, tightening axial force, friction coefficient, anti slip coefficient, screwability test, gasket elasticity, toughness test, hydrogen embrittlement test, etc.

3. Chemical composition analysis: fastener chemical composition analysis, fastener metal material grade identification, nezvimwewo.

4. Metallographic analysis: microstructure, kudzika kwe decarburization layer, kudzika kwecarburization layer, chiyero chekukura kwezviyo, kuiswa kwemukati, macrostructure, nezvimwewo.

5. Kukundikana kuongorora: kuputika kwekuputika, kuongorora kuparara, kuongorora kuparara, nezvimwewo.

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