Hex Bolts mai rufi dacromet

2026-10-27

1. Gabatarwa

Kowane haɗin gwiwa da aka kulle yana yaƙi da lalata. Hex bolt (hexagon head cap screw) na iya zama abin ɗaure da aka fi sani da shi a duniya, amma da zarar an sanya shi a cikin gada, hasumiya mai watsawa, ko masana’antar sinadarai, nan da nan sai danshi, oxygen, chloride ions, da sulfur dioxide ya afka masa. Tsatsa - na farko farin tsatsa (kayayyakin oxidation na zinc), sannan jan tsatsa (iron oxide) - yana ratsa saman saman, yana shiga cikin zaren, kuma a ƙarshe ya kama goro, yana raunana nauyin matsawa, kuma yana lalata haɗin gwiwa.

Dacromet shafi (wanda kuma ake kira DACROMET, zinc-flake coating, ko nonelectrolytic zinc-aluminum flake coating) an ƙera shi daidai don cin nasarar wannan yaƙin. Yana ba da kusoshi na hex, studs, da madaidaicin hex goro da wanki wani bakin ciki, uniform, sulke mara hydrogen wanda ke tsira fiye da sa'o'i 700 na gwajin gishiri mai tsaka-tsaki (NSS) - sau da yawa juriya na lalata electro-galvanizing a kauri ɗaya.

2. Fastener Basics: The Hex Bolt a cikin Ƙarƙashin Ƙarfafawa

Kullin hex yana aiki tare da goro (ko rami da aka taɓa) don haɗa sassa biyu ko fiye tare. Mutuncin haɗin gwiwa ya dogara da preload (Load load) da aka gabatar a lokacin ƙarfafawa, wanda aka yi amfani da shi yana sarrafawa karfin juyi, zaren sautin, da kuma gogayya coefficient (μ) tsakanin filaye masu ɗaure da zaren. A cikin taro mai sarrafa juzu'i, injiniyoyi suna canza abin da aka yi niyya zuwa ƙimar juzu'i ta amfani da goro factor (K ≈ 0.12-0.16 don lubricated zinc-flake fasteners).

Abubuwan da aka saba da juna a cikin taron da aka kulle sun haɗa da:

Hex bolts / hex hula sukurori- cikakken zaren (DIN 933 / ISO 4017) ko zaren yanki (DIN 931 / ISO 4014), ajin dukiya 8.8, 10.9, ko 12.9;
Hex kwayoyi- ISO 4032 daidaitaccen kwayoyi ko ISO 4033 na bakin ciki / jam, aji wanda ya dace da kusoshi;
Lebur washers(DIN 125) da spring washers (DIN 127) - rarraba nauyin ɗaukar nauyi kuma ƙara juriya na girgiza;
Studs da sanduna masu zare- don haɗin gwiwar flanged da tarurukan da aka kulle;
Flange kwayoyi da flange kusoshi- tare da haɗe-haɗe flanges don taushi substrates.

Kowane ɗayan waɗannan abubuwan dole ne su raba tsarin kariya iri ɗaya; kullin Dacromet wanda aka haɗa tare da ƙwaya mai ƙyalli na tutiya yana haifar da a galvanic biyu wanda ya fara sadaukar da goro.

3. Juriya na Lalata: Dacromet vs. Sauran Ƙarshen Bolt

Jimiri na fesa gishiri (ISO 9227 / ASTM B117, sa'o'i zuwa jan tsatsa) shine alamar masana'antar don kariyar lalata.

Tsarin gamawa / sutura	Kauri	Awanni zuwa jan tsatsa (NSS)	Farin tsatsa (NSS)	Haɗin hydrogen	Bayanan kula
Filaye (launi, mai mai)	—	<24 h	—	Babu	Amfani na cikin gida kawai
Zinc plating, blue chromate (Zn3)	5m ku	≈ 48 h	12-24 h	Babban	Ƙananan farashi, kayan masarufi
Zinc plating, kauri passivate (Zn12)	12m ku	≈ 192 h	96-168 h	Babban	Ba don aji ≥ 10.9
Injiniya galvanizing	20-50 m	300-800 h	200-400 h	Ƙananan sosai	Yayi kyau ga manyan sassa
Hot-tsoma galvanizing (HDG)	45-85 m	500-1,500 h	200-500 h	Ƙananan	Zaren yana buƙatar sake dannawa
Darasi na 2	8m ku	≈ 720 h	300-500 h	Babu	Daidaitaccen zaren da aka yanke
Dacromet Class 3 / baki	10-12 m	≈ 1,000 h	500-720 h	Babu	Mota OEM benchmark

Dacromet kuma ya zarce plating na zinc a cikin Gwajin Kesternich TS ISO 6988 lalata - yanayin masana'antu da ruwan sama na acid) gwajin lalata cyclic (CCT: hade gishiri / zafi / bushewa), in galvanic jituwa tare da aluminium substrates (godiya ga abun ciki flake aluminum), a hawan keke (fim ɗin inorganic yana jure wa sabis na 120-300 ° C, inda kayan kwalliyar kwayoyin halitta) sinadaran juriya zuwa gishirin hanya da sinadarai masu kashe kankara.

4. Kammalawa

Don hex bolts da kayan aikin su na mating, Dacromet shafi yana ba da mafi kyawun ma'auni na kariyar lalata, daidaiton injiniya, da amincin taro da ake samu a yau: juriyar juriyar gishiri har zuwa sa'o'i 1,000, rigakafi ga haɓakar hydrogen, ginshiƙan zaren da aka adana, da kwanciyar hankali don taro mai sarrafa ƙarfi. Duk inda haɗin gwiwa da aka kulle dole ne ya tsira daga ruwan sama, gishiri, da lokaci, ƙayyadaddun da za a tuna shine: Babban ƙarfi hex bolt, zinc-flake (Dacromet) mai rufi, ISO 10683 / ASTM F1136 mai yarda.

Ba Da. Na gaba.

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