Uhlolojikelele Lomkhiqizo Lo mkhiqizo iyibhawodi eliqinile eline-Dacromet-coated elakhiwe ngensimbi ekhabhoni eqinile noma insimbi engxubevange, etholakala ngezigaba zamandla ezi-Grade 8.8, 10.9, kanye ne-12.9. Amabhawodi ane-Dacromet (i-zinc-aluminum flake) coating — i-non-electrolytic, i-water-based inorganic coating enikeza ukumelana nokugqwala okungavamile ngaphandle kwengozi ye-hydrogen embrittlement. Lokhu kwenza i-Dacromet ibe ukwelashwa kwendawo okuthandwayo kuma-fasteners anamandla aphezulu lapho i-electroplating evamile ingalimaza ubuqotho besakhiwo. Umugqa womkhiqizo uhlanganisa ama-hex head bolts (DIN 931 / DIN 933), ama-flange bolts (DIN 6921), ama-socket head cap screws (DIN 912), kanye nama-threaded rods / stud bolts, ngosayizi womucu osukela ku-M6 kuya ku-M36 (M42–M64 kuyatholakala ngokucela) kanye nobude obusukela ku-10 mm kuya ku-500 mm. Amabhawodi ane-Dacromet-coated avame ukucaciswa kwezokwakha, ezokuthutha ngesitimela, ezimoto, amandla elanga, amandla omoya, ezasolwandle, kanye nezokusetshenziswa kwe-petrochemical eMpumalanga Ephakathi nase-Asia Ephakathi. Izinto Zokwakha Nezigaba Zamandla I-Grade Material Tensile Strength (min.) Yield Strength (min.) Hardness Izicelo Ezijwayelekile 8.8 Insimbi ekhabhoni ephakathi (45#, 10B21) ≥800 MPa ≥640 MPa 250–320 HB Ukwakhiwa okujwayelekile, imishini, ukufakwa kwelanga 10.9 Insimbi engxubevange (35CrMo, 40Cr, SCM435) ≥1,040 MPa ≥940 MPa 320–380 HV Imishini esindayo, ezimoto, i-wind turbine 12.9 Insimbi engxubevange (42CrMo, SCM435) ≥1,220 MPa ≥1,100 MPa 385–435 HV Izicelo ezibalulekile ezinamandla aphezulu, ama-fasteners enjini Amabhawodi e-Grade 8.8 afinyelela amandla okudonsa okungenani angu-800 MPa kanye namandla okukhiqiza angu-640 MPa, lapho u-"8" emelela cishe u-1/100 wamandla okudonsa okungenani nge-MPa kanti u-".8" ukhombisa isilinganiso se-yield-to-tensile esingu-0.8. Amabhawodi e-Grade 10.9 anikeza amandla okudonsa okungenani angu-1,040 MPa kanye namandla okukhiqiza okungenani angu-940 MPa, ngobulukhuni bendawo obuvamile obusukela ku-320 kuya ku-380 HV. Amabhawodi e-Grade 12.9 afinyelela amandla okudonsa okungenani angu-1,220 MPa kanye namandla okukhiqiza okungenani angu-1,100 MPa, ngobulukhuni obungu-385–435 HV. Ukwakheka kwezinto: Amabhawodi e-Grade 8.8 ngokuvamile enziwa ngensimbi ekhabhoni ephakathi (45#, 10B21) nge-quenching kanye ne-tempering. Amabhawodi e-Grade 10.9 kanye ne-12.9 adinga insimbi engxubevange (35CrMo, 40Cr, 42CrMo, SCM435) ngokwelashwa okulawulwayo kokushisa ukuze kufinyelelwe izakhiwo zemishini ezicacisiwe kuyilapho kugcinwa ukuqina okwanele. Ubuchwepheshe Be-Dacromet Coating I-Dacromet (eyaziwa nangokuthi i-zinc-chromium coating noma i-zinc-aluminum flake coating) iyi-non-electrolytic, i-water-based inorganic coating ehlanganisa ama-zinc kanye ne-aluminum flakes agqagqene ku-inorganic binder matrix. I-coating isetshenziswa ngezindlela ze-dip-spin, spray, noma dip-drain futhi iphekwe ngokushisa cishe ku-300–320°C, yakhe isakhiwo esiminyene, esinezingqimba eziningi se-lamellar esinikeza kokubili ukuvikelwa kwe-barrier kanye nokuvikelwa kwe-sacrificial (cathodic) kwensimbi engaphansi. Izicaciso ezibalulekile zobuchwepheshe: I-Parameter Specification Ubukhulu be-Coating 5–12 μm (Grade A: 5–8 μm; Grade B: 8–12 μm) Isisindo se-Coating Grade A: ≥24 g/m²; Grade B: ≥36 g/m² Ukumelana ne-Salt Spray Grade A: ≥600 h ngaphandle kwe-red rust; Grade B: ≥1,000 h ngaphandle kwe-red rust Izinga Lokushisa Eliphezulu Lokusebenza 250–300°C (okuqhubekayo) I-Coefficient of Friction 0.10–0.15 (nge-lubricated topcoat: 0.06–0.19) Ukubukeka Metallic silver-gray, uniform matte finish Ingozi ye-Hydrogen Embrittlement Ayikho — inqubo ye-non-electrolytic, akukho acid pickling I-Dacromet ifinyelela ≥1,000–1,500 amahora okumelana ne-salt spray (ASTM B117 / ISO 9227) ngaphambi kokuvela kwe-red rust — cishe izikhathi ezingu-7 kuya kwezingu-10 zokusebenza kwe-electro-galvanizing ejwayelekile yobukhulu obufanayo. Ngisho ne-Grade A specification inikeza ≥600 amahora ngaphandle kwe-red rust, isebenza kangcono kakhulu kune-zinc plating evamile (ngokuvamile 72–144 amahora). Akukho hydrogen embrittlement: Inqubo ye-Dacromet isebenzisa i-shot blasting kuphela ukulungiselela indawo — i-acid pickling igwenywa ngamabomu — futhi akukho current kagesi edluliswa ngengxenye ngesikhathi sokusetshenziswa kwe-coating. Lokhu kuqeda ukumuncwa kwe-hydrogen okubangela ukuqhekeka okunobuthakathaka okubambezelekile kuma-fasteners anamandla aphezulu (Grade 10.9 nangaphezulu). Lona yinzuzo ebalulekile yokuphepha ye-Dacromet ngaphezu kwe-electroplating kumabhawodi anamandla aphezulu. Ukugcinwa kokulingana komucu: I-coating encane kakhulu (5–12 μm) igcina i-geometry yomucu futhi iqinisekisa ukuhlangana okufanele namantongomane ajwayelekile. Ngokungafani ne-hot-dip galvanizing (45–85 μm), akukho post-coating thread re-tapping edingekayo, futhi ubudlelwano be-torque-tension buhlala buhambisana futhi bungalindeleka. I-Dacromet vs. Ezinye Ama-Coatings — Ukuqhathanisa Kokusebenza I-Property Dacromet Electro-Galvanizing Hot-Dip Galvanizing Ubukhulu be-Coating 5–12 μm 5–15 μm 45–85 μm I-Salt Spray (kuya ku-red rust) ≥1,000–1,500 h 100–300 h 500–800 h I-Hydrogen Embrittlement Ayikho Ingozi ephezulu Ingozi emaphakathi Izinga Lokushisa Eliphezulu Lokusebenza ~300°C ~100–150°C ~200–250°C Umthelela Wokulingana Komucu Mncane Phansi Omkhulu (i-re-tapping iyadingeka) Ukuvikelwa Kokugqwala 7–10× kangcono kune-electro-galvanizing I-Baseline 3–5× kangcono kune-electro-galvanizing I-Dacromet yenza kangcono kune-hot-dip galvanizing nge-2–3× ezivivinyweni ze-neutral salt spray, okuyenza ilungele izindawo zasolwandle nezinomswakama ophezulu. Nakuba i-hot-dip galvanizing inikeza ungqimba lwe-zinc olujiyile lokuvikelwa kwemishini ezicelweni zesakhiwo, i-Dacromet ingcono kuma-fasteners anembile kanye namabhawodi anamandla aphezulu abalulekile ekuphepheni lapho ukubekezelelana komucu nokumelana ne-hydrogen embrittlement kubaluleke kakhulu. Amazinga Nezicaciso I-Parameter Imininingwane Uhlobo Lomkhiqizo I-Hex Head Bolt / Flange Bolt / Socket Head Cap Screw / Threaded Rod I-Standard DIN 931 (partial thread) / DIN 933 (full thread) / DIN 6921 (flange) / DIN 912 (socket) / ISO 4014 / ISO 4017 / ASME B18.2.1 Usayizi Womucu M6, M8, M10, M12, M16, M20, M24, M30, M36 (M42–M64 ngokucela) I-Thread Pitch M6×1.0, M8×1.25, M10×1.5, M12×1.75, M16×2.0, M20×2.5, M24×3.0, M30×3.5 Ububanzi Bobude 10 mm – 500 mm (kungenziwa ngokwezifiso) Ukubekezelelana Komucu 6g (metric) / Class 2A (imperial) Izinto Insimbi ekhabhoni: Q235, 45#, 10B21; Insimbi engxubevange: 35CrMo, 40Cr, 42CrMo, SCM435 Ukuqedwa Kwendawo I-Dacromet (ejwayelekile); HDG, zinc plated, black oxide, Geomet kuyatholakala I-DIN 931 icacisa amabhawodi e-hexagon head anomucu oyingxenye ane-plain shank, kuyilapho i-DIN 933 icacisa amabhawodi e-hexagon head anomucu ogcwele. Womabili amazinga ahlanganisa ama-metric coarse threads kusukela ku-M6 kuya ku-M36 kuma-product grades A no-B. I-DIN 6921 ihlanganisa ama-hexagon flange bolts ane-flange ehlanganisiwe ngaphansi kwekhanda elisabalalisa umthwalo wokubopha ngokulingana kakhulu futhi liqede isidingo se-washer ehlukile. Izici Zemishini (Reference) Usayizi I-Grade Amandla Okudonsa (MPa) Amandla Okukhiqiza (MPa) Ubulukhuni M10 8.8 800 640 250–320 HB M12 8.8 800 640 250–320 HB M16 8.8 800 640 250–320 HB M16 10.9 1,040 940 320–380 HV M20 10.9 1,040 940 320–380 HV M24 10.9 1,040 940 320–380 HV M24 12.9 1,220 1,100 385–435 HV M30 12.9 1,220 1,100 385–435 HV Amabhawodi e-Grade 10.9 abonisa isilinganiso se-yield-to-tensile esicishe sibe ngu-0.90, kuyilapho amabhawodi e-Grade 12.9 efinyelela cishe u-0.90 ngamanani amandla aphezulu kakhulu. Isilinganiso samandla okukhiqiza ensimbi engu-12.9 sicishe sibe ngu-17% ngaphezulu kune-10.9, kanti amandla okugcina akhula cishe nge-16%. Izicelo Amabhawodi anamandla aphezulu ane-Dacromet-coated asetshenziswa kabanzi kuzo zonke izimboni: Ukwakha Nezingqalasizinda — Ukuxhumana kwensimbi yesakhiwo, ukubopha isisekelo sekholomu, ama-fasteners ebhuloho, ukhonkolo olwenziwe ngaphambili Ezokuthutha Ngesitimela — Amasistimu okubopha ithrekhi, ukuhlanganisa izimoto ezihambayo, imishini yezimpawu Ezimoto Nezokuthutha — Ukuhlanganisa i-chassis ne-powertrain, ama-fasteners enjini, amasistimu e-exhaust Amandla Omoya Namandla Elanga — Amabhawodi ombhoshongo we-turbine, ukuxhumana kwama-blade, amasistimu okufakwa kwelanga I-Petrochemical Nezasolwandle — Ama-fasteners e-offshore platform, ama-flange epayipi, imishini yokucubungula amakhemikhali Imishini Esindayo — Imishini yokwakha, imishini yezolimo, imishini yezimayini Ezokuxhumana — Ukubopha umbhoshongo ne-antenna, ukuxhumana kwe-grounding Imishini Yezokwelapha — Ukuhlanganisa imishini enembile lapho ukumelana nokugqwala kanye nezici ezingezona magnetic kudingeka Umkhiqizo ulungele ikakhulukazi izindawo zangaphandle nezinomswakama ophezulu lapho ukumelana nokugqwala kwesikhathi eside kubalulekile, kuhlanganise nokufakwa kwasogwini, ezasolwandle, kanye nezimboni. Izinketho Zokuqedwa Kwendawo Ukuqedwa Ubukhulu be-Coating Ukumelana ne-Salt Spray Indawo Enconywayo I-Dacromet (Ejwayelekile) 5–12 μm 600–1,500+ amahora Ogwini, ezasolwandle, ezimboni, ngaphandle I-Geomet (Chrome-Free) 5–10 μm 500–1,200+ amahora Amaphrojekthi anomthelela kwezemvelo I-Hot-Dip Galvanized 45–85 μm 500–800 amahora Isakhiwo esindayo, ingqalasizinda yangaphandle I-Zinc Plated 8–12 μm 72–144 amahora Ngaphakathi, ezimboni ezijwayelekile I-Black Oxide 1–2 μm 24–48 amahora Ngaphakathi, amathuluzi, imishini Izindlela zesimanje ze-chromium-free Dacromet ziyatholakala kumaphrojekthi adinga ukuhambisana ne-RoHS, REACH, kanye ne-ELV. Lezi zindlela ze-chrome-free ziqeda i-hexavalent chromium (Cr⁶⁺) kuyilapho zigcina ukusebenza kokugqwala okufanayo. Ukupakisha Nokwenza Ngokwezifiso Ukupakisha Kokuthumela Ngaphandle: Ibhokisi lokhuni / ikhreyithi / i-steel pallet Ukupakisha Kwasekhaya: I-corrugated carton / inqwaba nge-strapping I-OEM/ODM: Iyatholakala — osayizi abenziwe ngokwezifiso, izinhlobo zomucu, izinto, izigaba zamandla, kanye nokuqedwa kwendawo kungenziwa ngokwemidwebo noma amasampula I-MOQ: Kuyaxoxisana Isiqinisekiso Sekhwalithi Yonke imikhiqizo yenziwa ngaphansi kwezinqubo zokulawula ikhwalithi eziqinile ngokuhambisana ne-ISO 898-1 (izici zemishini zama-fasteners), i-DIN, i-ISO, i-GB, kanye namazinga e-ANSI/ASTM. Umkhiqizo ufinyelele izinga lokubuyekezwa okuhle lika-100% ngezinga lokuthenga kabusha lika-50% kunkundla, okubonisa ikhwalithi engaguquki nokwaneliseka kwamakhasimende. Izitifiketi zokuhlolwa kwezinto (EN 10204 3.1), imibiko yokuhlolwa kobukhulu, imibiko yokuhlolwa kobulukhuni, kanye nemibiko yokuhlolwa yabantu besithathu (SGS, BV, CTI) kunganikezwa ngokucela. Kuma-grade anamandla aphezulu (10.9 kanye ne-12.9), ukuhlolwa kokudonsa, ukuhlolwa kobulukhuni, kanye nokuhlolwa komthelela kwenziwa kuqoqo ngalinye lokukhiqiza. Imininingwane Yokucela Ukufaka i-oda noma ukucela isilinganiso sentengo, sicela ucacise: Uhlobo lomkhiqizo — I-Hex head bolt / Flange bolt / Socket head cap screw / Threaded rod I-Standard — DIN 931 / DIN 933 / DIN 6921 / DIN 912 / ISO 4014 / ISO 4017 / ASME B18.2.1 Izinto — Insimbi ekhabhoni (Q235/45#/10B21) / Insimbi engxubevange (35CrMo/40Cr/42CrMo/SCM435) I-Strength grade — 8.8 / 10.9 / 12.9 Usayizi nomucu we-thread — isb., M16 × 2.0 noma M20 × 2.5 Ubude — Cacisa ubude obuphelele nobude bomucu uma kusebenza Ukuqedwa kwendawo — Dacromet (ejwayelekile) / Geomet / HDG / Zinc plated / Black oxide Inani — Ngokubekezelelana kokuthunyelwa okungaphezulu/okungaphansi Isitifiketi — EN 10204 3.1 MTC / SASO conformity (yeSaudi Arabia) / GOST-K (yeKazakhstan) Izidingo ezikhethekile — Ukubekezelelana komucu, ukumaka, ukupakisha, i-topcoat (lubricated/non-lubricated), njll.