Fakamatala Sivi
Ko e sivi bearing steel testing 'a e ZHONGXI Testing 'oku faka'aonga'i ki hono vakai'i 'o e koula bearing (kasa malohi 'oku faka'aonga'i ki he podipa) ki hono faka'osinga 'o 'ene malu, 'ene fakapapau'i kasa 'i he /ma'olalo 'o e veivei'uaki, mo hono vakai'i 'o e founga 'o e gaue 'o e ukamea, ke ma'u ha totonu 'oku lelei 'a e koula bearing 'o a'u ki he ngaahi ki'i faka'osinga 'oku fiu 'i he ngaahi palanifakagaue 'o e motuka, masini, mo e ngaahi me'angaue faka-industrial. 'Oku faka'aonga'i 'a e koula bearing 'i he ngaahi founga faka'industrial 'oku ne fie ma'u ha loki 'oku tōlai 'aupito, koe'uhi 'oku 'i loto he podipa 'a e uesia 'oku ne punou, 'oku ne togi, pea 'oku ne hiki ha mamafa loloa taha 'i he taimi 'oku maumau 'eku ai. Na'e tolotolo 'a e ngaahi palanifakagaue 'oku mau sivi ai ko e ngaahi motuka 'o e ngaahi kamupani fakapoto, ngaahi fale'anga va'avingaulia, ngaahi masini 'o e fale'anga kasa, ngaahi fale'anga fetu'utaki 'o e palesiteni, mo e ngaahi me'angaue 'a e potu vakalele.
Anga 'o e sivi 'o e koula bearing, 'oku 'i ai ha poupou ke ma'u 'i he taimi ni 'oku tokolahi 'a e ngaahi me'a 'oku mau sivi: ko hono vakai'i 'o e kasa 'a e kimikale (carbon, silicon, manganese, chromium, mo e ngaahi veivei'uaki 'o ha'o ni 'oku fiu 'i he founga 'o e ukamea), ko hono vakai'i 'o e malu 'o e kasa (hardness, hardness 'o hono fika'i, mo e hardness 'o hono surface), ko hono fakahā 'o e ta'e-ma'u (non-metallic inclusions 'o ha'o 'oku taha, sulfur, mo e oxide), ko hono vakai'i 'o e tu'unga 'o e 'uhatufa (microstructure, decarburization 'o hono surface, mo e carbide distribution), mo e ngaahi founga faka-mechanical (tensile strength, fatigue life, mo impact toughness). 'Oku faka'aonga'i 'i he sivi 'a e ngaahi me'angaue 'o ha'o 'oku 'i ai ha optical emission spectrometer (OES), Vickers mo Rockwell hardness testers, universal testing machines, metallographic microscopes, scanning electron microscopes (SEM), mo e ultrasonic flaw detectors.
Ko hono vakai'i 'oku 'a e paleseseni 'o e sivi ko e lekooti 'o e fakamatala 'o e sample (koe'uhi ko e grade, 'a e founga 'o hono gaue, mo e tu'unga 'o hono fakatupu), pea ma'u ha fika 'oku totongi ki ai, pea ma'u ha fakamatala 'oku ne fakamatala'i 'a e ngaahi items 'oku fiu 'i he sivi. 'Oku hoko atu 'a e ngaahi me'a 'oku sivi: ko e hono fakatapu 'o e sample (cutting, mounting, polishing, mo etching ki he ngaahi sample 'oku sivi ki he metallography), ko e hono fakatupu 'o e ngaahi me'angaue 'a e calibration blocks 'oku fiu, pea ma'u 'a e hono fika 'o e ngaahi ngaue. 'Oku ma'u 'a e fika 'oku sivi ai 'a e ngaahi me'a 'oku 'i ai: 'a e carbon 'oku ma'u 'i he 0.95–1.10% ki he GCr15, 'a e chromium 'oku ma'u 'i he 1.40–1.65%, ko e hardness 'oku fiu 'i he 61–65 HRC 'i he founga 'o hono gaue, pea 'oku vakai'i 'o e inclusions ki he founga 'o e ASTM E45 'o A, B, C, mo D types.
'Oku 'i ai ha poupou 'oku fiu 'i he sivi 'o e bearing steel 'a e ngaahi ki'i founga 'oku tokolahi: 'oku fakapotopoto'i 'a e ngaahi palani fakagaue 'o e hot-rolled, cold-drawn, mo e spheroidize-annealed bearing steel bars, ngaahi tube 'oku faka'aonga'i ki he bearing rings, ngaahi forging billets, mo e ngaahi finished components 'oku 'i he founga 'o hono gaue 'oku fiu 'i he heat treatment. 'Oku 'i ai 'a e ngaahi founga 'oku 'i ai 'a e ngaahi me'a 'oku sivi ai 'oku kehekehe 'i he founga 'o hono fakatupu 'o e kasa, koe'uhi 'oku fie ma'u 'i he hot-rolled bars ha decarburization layer 'oku fiu 'oku si'i 'i he 'uteute, pea 'oku fie ma'u 'i he cold-drawn wires ha surface 'oku ma'u 'eku ai 'a e ngaahi cracks.
Ngaahi Fehu'i Masani
'E fē 'a e taimi 'oku fiu mai ki he sivi bearing steel testing?
'Oku fiu 'i he sivi bearing steel testing 'a e 7–15 'aho 'o e ngaaho 'o e ngāue, 'oku hanga 'i he tokolahi 'o e ngaahi items 'oku sivi mo e tu'unga 'o e sample. Ki he ngaahi founga sivi chemical composition mo hardness 'oku fiu 'i he 3–5 'aho 'o e ngaaho 'o e ngāue; ki he metallographic examination mo inclusion rating 'oku fiu 'i he 5–7 'aho; ki he fatigue testing mo e comprehensive analysis programs 'oku fiu 'i he 10–15 'aho. Kapau 'oku 'i ai ha sample 'oku 'ikai lava 'o fakatapu 'i he taimi tatau 'oku fiu ai, 'oku mafai 'o lave ki he taimi sivi.
'E fē 'a e totongi 'o e sivi bearing steel testing?
'Oku fakapotopoto'i 'a e totongi 'o e sivi bearing steel testing 'i he tokolahi 'o e ngaahi items 'oku fiu 'i he sivi. Kapau 'oku fiu 'i he sivi 'a e chemical composition taha 'oku totongi si'i; kapau 'oku fiu 'i he sivi 'a e comprehensive program 'oku 'i ai ha chemical analysis, hardness, metallography, inclusion rating, mo e non-destructive testing, 'oku ma'u 'a e totongi 'oku ki loto. 'Oku mafai 'o ma'u 'a e fika 'oku totongi ki he ngaahi 'enisetiuta 'oku sivi ki he fakamatala 'oku ne fakamatala'i 'a e sample mo e ngaahi items 'oku fiu.
'E fē 'a e sample 'oku fiu 'o fakatokanga'i ki he sivi?
'Oku fiu 'i he sivi 'a e sample bearing steel 'oku ma'u 'i he 100–500 g ki he chemical analysis, ha bar segment 'oku loloto 50–100 mm ki he hardness mo metallographic examination, pea ko e ngaahi finished components 'oku fiu 'i he 3–5 pieces. Ki he inclusion rating 'oku fiu 'a e cross-section sample 'oku ma'u 'i he 20 mm × 20 mm; ki he tensile testing 'oku fiu 'a e machined round specimens 'oku ma'u 'i he gauge diameter 5 mo 10 mm. 'Oku fie ma'u 'a e fakamatala 'oku ne fakamatala'i 'a e grade 'o e ukamea, 'a e product form, mo e heat treatment state ki hono fakapapau'i 'a e founga 'oku sivi ai.
'E fē ha ngaahi items 'oku 'i he founga 'o e sivi bearing steel testing ki he ngaahi finished components?
'Oku 'i he founga 'o e sivi 'o e finished components 'a e surface hardness 'oku fiu 'i he 61–65 HRC, 'a e microstructure 'oku vakai'i 'a e martensite 'oku ma'u 'i he retained austenite mo e carbides, 'a e retained austenite content 'oku fiu 'i he 2–5%, 'a e surface defects 'oku vakai'i 'i he magnetic particle inspection, 'a e grinding burns 'oku vakai'i 'i he nital etching, mo e dimensional stability 'oku vakai'i 'i he temperature cycling. 'Oku kehekehe 'a e founga 'oku fiu 'i he product form: 'oku fiu 'i he annealed bars 'a e spheroidization rating mo annealed hardness; 'oku fiu 'i he carburized components 'a e case depth mo core hardness.
sivi bearing steel testing Ngaahi Me'a Sivi
- GCr15SiMn bearing steel bars 'oku ma'u 'a e mangaanisi mo silikoni 'oku ma'u 'i he founga 'o hono gaue 'oku fiu
- GCr18Mo bearing steel tubes 'oku faka'aonga'i ki he fakatupu 'o e cylindrical roller bearing rings
- G20CrNi2Mo case-carburizing bearing steel 'oku faka'aonga'i ki he ngaahi bearing 'oku malohi 'o e motuka loloa
- GCr15 hot-rolled bearing steel wire rods 'oku ma'u 'i he diameter 5.5–20 mm
- GCr15 cold-drawn bearing steel wires 'oku faka'aonga'i ki he fakatupu 'o e balls mo rollers
- Spheroidize-annealed GCr15 bars 'oku vakai'i 'a e carbide spheroidization rating mo hardness 'oku fiu 'i he 179–207 HBW
- Bearing steel forging billets 'oku vakai'i 'a e carbide banding mo carbide network
- Bearing steel tubes 'oku ma'u 'i he wall thickness 3–40 mm 'oku vakai'i 'a e wall decarburization
- Bearing steel balls 'oku ma'u 'i he diameter 0.5–100 mm 'oku vakai'i 'a e surface hardness mo dimensional accuracy
- Tapered roller blanks 'oku vakai'i 'a e surface cracks 'i he founga 'o e magnetic particle inspection
- Cylindrical roller blanks 'oku vakai'i 'a e grinding burns 'i he founga 'o e nital etching
- Thrust bearing washers 'oku vakai'i 'a e flatness mo hardness uniformity
- Bearing inner rings mo outer rings 'oku ma'u 'i he heat-treated state 'oku vakai'i 'a e retained austenite content
- Stainless bearing steel 9Cr18 mo 9Cr18Mo 'oku faka'aonga'i ki he ngaahi bearing 'oku ma'u 'i he corrosion environment
- High-temperature bearing steel Cr4Mo4V 'oku faka'aonga'i ki he ngaahi bearing 'o e turbine mo jet engine
- Through-hardened bearing components 'oku vakai'i 'a e case depth mo core hardness gradient
- Carburized bearing components 'oku vakai'i 'a e effective case depth 'oku fiu 'i he 0.5–2.5 mm
- Bearing steel continuous cast billets 'oku vakai'i 'a e center porosity mo center segregation
- Bearing steel electroslag remelted (ESR) bars 'oku vakai'i 'a e reduced inclusion content
- Vacuum degassed bearing steel 'oku vakai'i 'a e oxygen content 'oku ma'u 'i he 10 ppm 'i lalo
- Bearing steel strips mo foils 'oku ma'u 'i he thickness 0.1–3 mm 'oku vakai'i 'a e surface quality
Fakatatala
Ko e sivi bearing steel testing 'a e ZHONGXI Testing 'oku fakapotopoto'i 'a e chemical composition analysis, hardness mo microhardness testing, metallographic microstructure examination, non-metallic inclusion rating, carbide structure evaluation, decarburization depth measurement, tensile mo impact testing, fatigue evaluation, mo e surface mo internal defect detection ki he hot-rolled, cold-drawn, forged, carburized, mo e heat-treated bearing steel bars, tubes, wires, mo e finished components. 'Oku fiu 'i he sivi 'a e 7–15 'aho 'o e ngaaho 'o e ngāue 'oku hanga 'i he founga 'o e items 'oku sivi, pea 'oku ma'u 'a e fika 'oku totongi ki he ngaahi 'enisetiuta 'oku sivi ki he fakamatala 'oku ne fakamatala'i 'a e ngaahi fiu 'o e sivi.