Dacromet Coated Flange Bolts-A Comprehensive Technical Guide to Design, Coating Technology, and Industrial Applications

2026-08-12

Chithunzi 1. Dacromet yokutidwa hex flange mabawuti - silver-gray zitsulo kumaliza

1. Mawu Oyamba

Ma flange bolts amayimira gulu lofunikira la zomangira zamakampani, kuphatikiza magwiridwe antchito a bawuti wokhazikika ndi chophatikizira chofanana ndi washer pansi pamutu wa bawuti. Zikaphatikizidwa ndi ukadaulo wokutira wa Dacromet, zomangira izi zimakwaniritsa mphamvu zamakina komanso kukana dzimbiri, zomwe zimawapangitsa kukhala ofunikira m'malo ovuta monga kupanga magalimoto, zomangamanga, zomangamanga zam'madzi, ndi makina olemera.

Nkhaniyi ikufotokoza mwatsatanetsatane za Dacromet yokutidwa flange mabawuti kuchokera mbali ziwiri: kapangidwe kamangidwe ndi makina katundu flange bolts, ndi luso lapamwamba mankhwala pamwamba otchedwa Dacromet. Pamodzi, zinthu izi zimatanthauzira njira yolumikizira yomwe imakwaniritsa zofunikira zamainjiniya amakono.

2. Kumvetsetsa Flange Bolts

Boliti ya flange ndi chomangira cha ulusi chokhala ndi flange yayikulu yophatikizika pansi pa mutu wa hexagonal. Flange iyi imagawira katundu wokhomerera pamalo okulirapo, ndikuchotsa kufunikira kwa chochapira chosiyana ndikuchepetsa nthawi ya msonkhano. Flange yophatikizika imaperekanso kukana kokulirapo kwa kumasuka pansi pa kugwedezeka, kuganizira kofunikira m'malo olemetsa.

Maboti a Flange amapangidwa mosiyanasiyana komanso mosiyanasiyana. Maboliti opindika amakhala ndi mano kunsi kwa flange komwe amagwira pamwamba pa makwerero, zomwe zimapangitsa kuti asagwedezeke. Matembenuzidwe osakhala ndi serrated amapereka malo osalala, oyenerera kuti agwiritse ntchito pamene kuwonongeka kwapamwamba kuyenera kuchepetsedwa.

Table 1. Zolemba Zodziwika za Dacromet Flange Bolts

Kufotokozera	Metric Range	Standard	Zakuthupi
Ulusi Diameter	M6 - M24	ISO 4162 / DIN 6921	Chitsulo cha Carbon (SCM435)
Kalasi ya Katundu	8.8 / 10.9 / 12.9	ISO 898-1	Aloyi Chitsulo
Flange Diameter	13-42 mm	Mtengo wa ISO 4162	Chitsulo cha Carbon
Kupaka pamwamba	Dacromet (Zn-Al)	ISO 10683	Zinc-Aluminium Flake
Kukaniza Kupopera Mchere	1,000 - 3,000 maola	Chithunzi cha ASTM B117	Palibe Dzimbiri Lofiira
Opaleshoni Temp.	-40C mpaka 300C	Industrial Std.	Kusamva Kutentha

3.Dacromet Coating Technology

Dacromet ndi ukadaulo wapamwamba wopangira madzi, osagwiritsa ntchito electrolytic pamwamba pomwe adapangidwa kuti athane ndi malire a malata wamba. Chophimbacho chimakhala ndi zinc flakes, ma aluminium flakes, ndi ma chromate omwe amamwazikana munjira yamadzimadzi. Akagwiritsidwa ntchito ndi kuchiritsidwa, ma flakeswa amapanga chotchinga chowundana chomwe chimapereka chitetezo chapadera cha dzimbiri popanda chiopsezo cha hydrogen embrittlement.

Chithunzi 2. Chithunzi chodutsana cha zigawo za Dacromet zokutira pazitsulo zachitsulo

Njira yokutira ya Dacromet imasiyana kwambiri ndi electroplating. M'malo moyika zitsulo kudzera mu electrolysis, Dacromet amagwiritsa ntchito dip-spin kapena kupopera mankhwala otsatiridwa ndi kuchiritsa kwa kutentha kwambiri. Pakuchiritsa pafupifupi 280-320 digiri Celsius, zinki ndi aluminiyamu flakes zimalumikizana pamodzi ndikumangirira gawo lapansi lachitsulo kudzera munjira yolumikizirana ndi chromate. Chophimbacho chimakhala chochepa kwambiri (nthawi zambiri ma microns 6-10), yunifolomu, komanso chotsatira kwambiri.

3.1 Kufotokozera mwachidule

Njira yogwiritsira ntchito Dacromet imaphatikizapo magawo angapo oyendetsedwa bwino, iliyonse imathandizira ku mawonekedwe omaliza a zokutira:

Table 2. Dacromet Coating Process Steps

Khwerero	Njira	Kufotokozera
1	Chithandizo chisanachitike	Degreasing, kuwombera kuwombera, ndi ultrasonic kuyeretsa kuchotsa mafuta, sikelo, ndi zoipitsidwa pa bolt pamwamba.
2	Kuviika / Kupopera mbewu mankhwalawa	Maboti amamizidwa mkati kapena kupopera mankhwala a Dacromet madzi opaka madzi okhala ndi zinc ndi aluminium flakes.
3	Spin Kuyanika	Kuzungulira kwa centrifugal kumachotsa zokutira kowonjezera kuti zitsimikizire makulidwe a yunifolomu (6-10 microns).
4	Kuchiritsa	Kuphika pa 280-320C kwa mphindi 20-30, kumangiriza ma flakes ku gawo lapansi kudzera mu sintering.
5	Chovala Chachiwiri	Kuzungulira kwachiwiri kwa dip-ndi-kuchiritsa kumagwiritsidwa ntchito powonjezera chitetezo cha dzimbiri (posankha pazoyala zolemera).
6	Kuchiritsa komaliza	Kuphika komaliza pa 300C kumatsimikizira kulumikizana kwathunthu komanso kumamatira kwakukulu kwa zokutira.

Ntchito yonseyi imamalizidwa m'mizere iwiri yokutira kuti mukwaniritse makulidwe omwe mukufuna komanso kuti musachite dzimbiri. Kuzungulira kulikonse kumakhala ndi kugwiritsa ntchito, kuyanika-kuzungulira, ndi kuchiritsa, ndipo chomaliza chikuwonetsa mawonekedwe asiliva-imvi.

4.Ubwino wa Dacromet Coating

Kupaka kwa Dacromet kumapereka maubwino angapo osiyana pamankhwala ochiritsira wamba, ndikupangitsa kukhala chisankho chokondedwa pamapulogalamu othamanga kwambiri:

Superior Corrosion Resistance: Zomangamanga zokutidwa ndi Dacromet zimatha kupirira maola 1,000 mpaka 3,000 akuyezetsa kupopera mchere (ASTM B117) asanawonekere dzimbiri lofiira, zomwe zimapambana kwambiri ndi electroplating yachikhalidwe ya zinc (maola 300-700).

Palibe Hydrogen Embrittlement: Mosiyana ndi electroplating, njira ya Dacromet sichimaphatikizapo electrolysis, kuthetsa chiopsezo cha hydrogen embrittlement. Izi ndizofunikira makamaka kwa ma bolts amphamvu kwambiri (Kalasi 10.9 ndi 12.9) omwe amagwiritsidwa ntchito pachitetezo chofunikira kwambiri.

Kukaniza Kwabwino Kwambiri Kutentha: Chikhalidwe cha nsabwe za m'masamba cha Dacromet chimalola kuti chizitchinjiriza pa kutentha mpaka madigiri 300 Celsius, kupitilira malire amafuta a zokutira organic ndi plating wamba zinki.

Kupaka Uniform: Njira yogwiritsira ntchito dip-spin imawonetsetsa makulidwe osasinthika ngakhale pama geometri ovuta, kuphatikiza malo okhala ndi ulusi ndi zotsalira pomwe ma electroplating amatha kupanga madipoziti osagwirizana.

Kugwirizana Kwachilengedwe: Mapangidwe amakono a Dacromet alibe hexavalent chromium (Cr6+), kutsatira malangizo a RoHS, ELV, ndi REACH, kuwapanga kukhala oyenera kugwiritsa ntchito magalimoto ndi zamagetsi.

5. Ntchito Zamakampani

Maboti a Dacromet okhala ndi flange amapeza kugwiritsidwa ntchito kwambiri m'mafakitale angapo pomwe kukhulupirika kwadongosolo komanso kuteteza dzimbiri kwa nthawi yayitali ndizofunikira kwambiri:

Makampani Agalimoto: Amagwiritsidwa ntchito pamisonkhano ya chassis, zoyikira injini, ma brake system, ndi zida zoyimitsidwa pomwe kumangirira mwamphamvu kwambiri kuphatikiza ndi kukana kupopera mchere ndikofunikira. Ma OEM Aakulu amafotokozera zomangira zomata za Dacromet zogwiritsa ntchito pansi pamadzi zomwe zili ndi mchere wamsewu ndi chinyezi.

Zomangamanga ndi Zomangamanga: Zogwiritsidwa ntchito muzitsulo zamapangidwe azitsulo, zigawo za mlatho, ndi zipangizo zakunja kumene mapangidwe odzipangira okha amachepetsa nthawi yoyika ndipo Dacromet yokutira imapereka zaka makumi ambiri za ntchito zopanda kukonza.

Marine ndi Offshore: Kukaniza kwapadera kwa kupopera mchere kwa Dacromet (mpaka maola 3,000) kumapangitsa mabawutiwa kukhala abwino pomanga zombo, nsanja zakunyanja, ndi zida zamadoko zomwe zimawonekera m'madzi amchere mosalekeza.

Mphamvu ya Mphepo: Imagwiritsidwa ntchito mu turbine tower flanges ndi nacelle mabwalo pomwe ma bolting amphamvu kwambiri amayenera kupirira kutsitsa kwapang'onopang'ono komanso kuwonetseredwa ndi chilengedwe pazaka 20+ za moyo wautumiki.

Makina a Railway ndi Olemera: Amagwiritsidwa ntchito m'makina omangirira, zida za injini, ndi zida zamigodi komwe kukana kugwedezeka ndi kuteteza dzimbiri kumafunika nthawi imodzi.

Palibe. Kenako.

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