Iyo yekuputira pamusoro pesiruu yakangokosha sezvakangoita screwr material pachayo. Screw threads inogadzirwa kuburikidza nekucheka kana kugadzira machining process, uye machira epamusoro anopa chikamu chakakosha chekudzivirira che screw shank neshinda.
Kuti izvozvo zviitike, screws inobatsira zvikuru kubva kune akasiyana einjiniya epamusoro machira ayo akagadzirirwa kune yega screw application kuitira kuti ipe yakakwana corrosion uye kupaza dziviriro.
Muchidimbu, machira epamusoro anoiswa kune screws kuti awedzere kupikisa kwepamusoro uye kudzivirira screw kubva pakutadza kusati kwasvika nekuda kwekuora kana kuputika.
Saka, ndedzipi nzira dzakajairika dzekurapa screw? Aya anotevera ndiwo anonyanya kufarirwa screw surface kurapwa nzira:
1. Zinc plating
Iyo inonyanya kuzivikanwa pamusoro pekurapa nzira yeScrew is electro galvanizing. Haisi kungodhura chete, asiwo ine chitarisiko chakanaka. Electroplating inowanikwa mune dema uye mauto girini. Zvisinei, chimwe chinokanganisa che electro galvanizing ndechokuti maitiro ayo ekudzivirira-corrosion ndeyese, uye ine yakaderera-anti-corrosion performance yechero plating (coating) layer. Kazhinji, ma screws mushure me electro galvanizing anogona kupasa kwaakarerekera munyu pfapfaidzo bvunzo mukati maawa 72, uye yakakosha yekuisa chisimbiso inoshandiswa zvakare, kuitira kuti munyu wekupfapfaidza bvunzo mushure me electro galvanizing inogona kugara kweanopfuura maawa 200, asi inodhura. , inodhura 5-8 nguva yakawanda seyakawanda galvanizing.
2. Chromium plating
Iyo chromium coating pane screw fasteners yakagadzikana munzvimbo, haichinjike nyore ruvara kana kurasikirwa nekupenya, ine kuoma kwakanyanya, uye inoshingirira kupfeka. Kunyangwe chromium coating ichiwanzo shandiswa sechishongedzo chekushongedza pazvisungo, haiwanzo kushandiswa mumaindasitiri anoda yakakwira corrosion kuramba. Nekuti yakanaka chrome plated fasteners inodhura sesimbi isina tsvina, inofanirwa kushandiswa chete kana kusimba kwesimbi isina kukwana. Kuvandudza chromium plating corrosion resistance, mhangura uye nickel inofanira kuiswa pamberi pechromium plating. Kunyange zvazvo chromium coating ichikwanisa kumira tembiricha yakakwira 1200 madhigirii Fahrenheit (650 madhigirii celsius), ine dambudziko rimwe chete rehydrogen embrittlement sekurira.
3. Sirivha uye nickel plating pamusoro
Silver coating ye screw fastenersinoshanda semafuta akasimba ezvisungo pamwe chete senzira yekudzivirira ngura. Nekuda kwekudhura, screws haawanzo shandiswa, uye dzimwe nguva mabhoti madiki anoiswawo sirivheri. Kunyangwe ichisvibisa mumhepo, sirivha ichiri kushanda pa1600 degrees Fahrenheit. Kuti ushande mumatembiricha akakwira uye kudzivirira screw oxidation, vanhu vanoshandisa yavo yakanyanya tembiricha kuramba uye hunhu hwekuzora. Mafasteners anowanzo nickel-plated panzvimbo dzine high conductivity uye corrosion resistance. Semuenzaniso, bhatiri remotokari rinopinda terminal.
4.Screw surface treatmentDacromet
Kurapa kwepamusoro kweDacromet ye screw fastenershaina hydrogen embrittlement, uye torque preload inogara ichiita zvakanaka kwazvo. Zvisinei, inosvibisa zvakakomba. Pasina kutarisisa nyaya dzine chromium uye kuchengetedzwa kwezvakatipoteredza, iyo inonyanya kukodzera kune yakakwirira simba fasteners ine yakasimba anti-corrosion zvinodiwa.
5. Surface phosphating
Kunyangwe phosphorating isingadhure pane galvanizing, inopa kudzivirirwa kushoma kubva mukuora.Screw fastenersinofanira kuzorwa mafuta mushure mekuita phosphating nekuti kuita kwemafuta kune zvakawanda zvekuita nekupokana kwekuora kwemafasteners. Shandisa general antirust mafuta mushure me phosphating, uye munyu wekupfapfaidza bvunzo inofanira kungotora 10 kusvika maawa 20. Iyo screw fastener inogona kutora maawa 72-96 kana yakakwira antirust mafuta akaiswa, asi mutengo wakapetwa ka2-3 kupfuura phosphating mafuta. Nekuda kwekuti torque yavo uye pre-kusimbisa simba zvine kuita kwakanaka kunoenderana, mazhinji emaindasitiri screw fasteners anobatwa ne phosphating + oiling. Inowanzo shandiswa mukuvaka maindasitiri nekuti inogona kugutsa zvinotarisirwa zvekusimbisa zvinodiwa panguva yekuunganidzwa kwezvikamu uye zvikamu. Kunyanya kana uchibatanidza zvimwe zvakakosha, mamwe screws anoshandisa phosphating, iyo inogona zvakare kudzivirira nyaya yehydrogen embrittlement. Nekuda kweizvozvo, mundima yeindasitiri, screw ine giredhi yakakwira kupfuura 10.9 anowanzo phosphated.
Nguva yekutumira: Feb-15-2023