I-Dacromet-Coated Socket Head Cap Screws

2026-11-03

1. Isingeniso

Izikulufo ze-socket head cap, ezisezingeni ISO 4762/DIN 912 - amabhawodi akhethwayo noma kuphi lapho kuhlangana khona imithwalo ephezulu yokubopha, amakhanda ahlangene, nokulawulwa kwetorque okunembile. Ngoba ngokuvamile akhiqizwa ngezakhiwo amakilasi 8.8, 10.9 futhi ikakhulukazi 12.9, lawa mabhawodi asebenza ngephesenti eliphezulu lamandla awo okukhiqiza, futhi lawo mandla afanayo awenza abe sengozini enkulu ukuntuleka kwe-hydrogen, i-stress corrosion cracking, kanye nokugqwala okuqalwe ku-head fillet nasezindongeni zesokhethi ye-hex.

I-Dacromet-Coated Socket Head Cap Screws

I-Dacromet coating - i-non-electrolytic i-zinc-aluminium flake uhlelo oluchazwe ngu ISO 10683 futhi I-ASTM F1136 - ibhekana ngqo nalobu buthakathaka. Kwifilimu ezacile engu-8–12 μm iletha amahora angama-720 kuye kwayi-1,000 wokumelana nesifutho sikasawoti kuqala. ukugqwala okubomvu (I-ASTM B117 NSS), ayidali ubungozi be-hydrogen embrittlement ngesikhathi sokucutshungulwa, futhi igcina i-geometry enesokhethi ye-hex enembile futhi 6g ukubekezelelana kwentambo ukuthi izikulufo zekhanda le-socket head zincike.

2. I-Bolt Geometry kanye nezici zokuklama

Isikulufu sekhanda lesokhethi iyibhawodi elinamandla agcwele elinekhanda eliyisilinda kanye nedrayivu yesokhethi ye-hexagon yangaphakathi:

Ikhanda le-cylindricalnge ququda indawo eyindilinga; ubukhulu bekhanda dk ≈ 1.5 × d — cishe buncane ngo-30–40% kunebhawodi lekhanda eliyihexagon elinosayizi ofanayo, okuvumela amaphethini amabhawodi ahlangene, asondelene;
I-Fillet yekhanda kuya ku-shank, indawo yenguquko ebalulekile yokukhathala lapho ukugxiliswa kwengcindezi kuphezulu kakhulu;
Intambo egcwele noma ingxenye(i-shank ebushelelezi) izitayela; izikulufi zentambo eyingxenye zibeka indiza yokugunda ku-shank engafundiwe ukuze kutholakale umthamo ophakeme wokugunda;
Amaphoyinti ahlukile: flat (chamfered) iphuzu standard; iphuzu lenjafuthi iphuzu lekhoni yendawo kanye nemisebenzi yokukhiya.

Uma kuqhathaniswa namabhawodi e-hex, i-SHCS ikhiqiza ngaphezulu ukulayisha kuqala ngenxa ye-torque efanayo ngenxa ye-socket drive esebenza kahle, futhi afakwe nokhiye be-hex, ama-torque wrenches, noma abashayeli be-hex abanamandla - okubenza babe ama-bolt ajwayelekile kumathuluzi omshini, isikhunta somjovo, ama-hydraulic manifolds, ama-jigs kanye ne-fixtures, namarobhothi.

3. I-Corrosion Performance Ukuqhathanisa

Ukugqoka ekilasini 8.8–12.9 SHCS	Ubukhulu	Isifutho sikasawoti ekugqwaleni okubomvu (ASTM B117)	Ingozi ye-hydrogen embrittlement	Amanothi
I-oxide emnyama (emnyama), enamafutha	< 1 μm	< 24 h	Lutho	Izimonyo kuphela; amafutha ayageza
I-Zinc phosphate + amafutha	3–5 μm	≈ 48–72 h	Lutho	Ukuqedwa okujwayelekile "okumnyama", impilo enomkhawulo
I-Electro-galvanized Zn12, Cr(VI)-free	12 um	≈ 192 h	Phezulu (12.9 akunconywa)	Isokhethi nemicu izacile
I-zinc-nickel alloy electro-plate	8-12 μm	≈ 480–720 h	Kuphakathi	Izindleko eziphakeme; idinga ukubhaka ngemuva
I-Dacromet DAC 320 (Ikilasi 2)	8 umm	≈ 720 h	Cishe akekho	Silver gray
I-Dacromet DAC 500 / emnyama	10-12 μm	≈ 1,000 h	Cishe akekho	Ukuqeda okumnyama kufana nochungechunge olumnyama

6. Amazinga kanye Nohlobo Olujwayelekile Lomkhiqizo

Amazinga abalulekile: ISO 4762/DIN 912 (izikulufu zekhanda lesokhethi), ISO 898-1 (izakhiwo zemishini), ISO 10683:2018 (ama-non-electrolytic zinc flake coatings), I-ASTM F1136, I-ASTM B117, ISO 4042 (i-electroplating kanye ne-HE guide), I-DIN 267-28 futhi I-GB/T 70.1 / GB/T 5267.3.

Ipharamitha	Ibanga Elijwayelekile
Ububanzi	M3 – M42 (No.4 – 1-1/2")
Ubude	6 – 300 mm, intambo egcwele noma intambo eyingxenye
Isigaba sempahla	8.8 / 10.9 / 12.9
Isitayela sekhanda	Okujwayelekile (ISO 4762), ikhanda eliphansi (DIN 6912), ikhanda eligoqekile
Khomba	Iphuzu eliyisicaba / inja / iphuzu lekhoni
Ukugqoka	I-DAC 320 / DAC 400 / DAC 500; isiliva grey noma emnyama; I-Cr(VI)-mahhala
Ukubekezelela intambo	6g, imicu eboshwe ngaphandle kokuphinda uthephe

7. Izicelo kanye Nesiqondiso Sokukhetha

1.Match enamathela ukuze amandla: ekilasini le-10.9 kanye ne-12.9 bolts, gcizelela i-non-electrolytic zinc flake (i-Dacromet / Geomet) ukuze kuqedwe i-hydrogen embrittlement;

2.Buyisela i-oxide emnyama ngobuhlakani: cacisa i-Dacromet emnyama lapho amakhasimende efuna ukubukeka okumnyama ngokuvikela ukugqwala kwangempela;

3.Qinisekisa ikilasi lokugqokangamahora e-NSS (DAC 320 ≈ 720 h; DAC 500 ≈ 1,000 h) futhi ucele umbiko wokuhlola womkhiqizi wokuhlanganisa;

4.Qinisekisa i-Cr(VI)-free passivation(i-chromium e-trivalent) yokuthobela i-RoHS / ELV;

5.Hlola idatha yokungqubuzana: thola i-nati kanye nombiko we-coefficient-of-friction wokuhlanganisa okulawulwa yi-torque;

6.Qedela uhlelo: sebenzisa amantongomane amboziwe, amawasha, nezinto ezifakiwe ezithenjiwe zamandla ahambisanayo ukuze ugweme amasethi okubopha okungenzeka axubile.

8. Isiphetho

Izikulufu zekhanda lekhanda lesokhethi eliboshwe nge-Dacromet zihlanganisa izici ezinhle zemishini yamabhawodi enhloso ejwayelekile - amakhanda ayi-cylindrical ahlangene, i-hex socket drive esebenza kahle, amandla okulayisha aphezulu - ngohlelo lokumboza olwakhelwe kahle amaphuzu alo abuthakathaka: akukho embrittlement ye-hydrogen kunsimbi engu-12.9, ukumbozwa esisekelweni nasezindaweni ezizungezile, ukugoqa kanye nezingosi ezibomvu. ukuzinza komhlangano oqondile. Zicaciswe kahle, ziletha amahora angama-720–1,000 wokufutha usawoti efilimini engu-8–12 μm, futhi zilethe ukubukeka okumnyama, okufiphele kwamabhawodi amnyama kusevisi yangempela yokungagqwali.

Anginayo. Okulandelayo.

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