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Dacromet-Ti a bo Hex Bolts
2026-10-27
1. Ifihan
Gbogbo bolted isẹpo ni a ogun lodi si ipata. Bolt hex (hexagon head cap screw) le jẹ ohun ti o wọpọ julọ ni agbaye, ṣugbọn ni kete ti o ba ti fi sii ni afara, ile-iṣọ gbigbe, tabi ọgbin kemikali kan, ọrinrin, oxygen, awọn ions kiloraidi, ati sulfur dioxide yoo kọlu lẹsẹkẹsẹ. Ipata - akọkọ ipata funfun (awọn ọja ifoyina sinkii), lẹhinna ipata pupa (iron oxide) - nrakò kọja awọn ti nso roboto, seeps sinu awọn okun, ati ki o bajẹ nfi awọn nut, weakens awọn dimole fifuye, ati awọn destroys awọn isẹpo.
Dacromet ti a bo (tun npe ni DACROMET, zinc-flake cover, tabi aisi-itanna zinc-aluminiomu flake ti a bo) ti ni idagbasoke ni deede lati ṣẹgun ogun yii. O fun awọn boluti hex, awọn studs, ati awọn eso hex ti o baamu ati awọn ifọṣọ ni tinrin, aṣọ-aṣọ, ihamọra ti ko ni hydrogen ti o ye diẹ sii ju awọn wakati 700 ti idanwo iyọ didoju (NSS) - ni ọpọlọpọ awọn akoko ipata ipata ti elekitiro-galvanizing ni sisanra kanna.
2. Awọn ipilẹ Fastener: Hex Bolt ni Asopọ Bolted
Bọlu hex kan n ṣiṣẹ pẹlu nut (tabi iho ti a tẹ) lati di awọn ẹya meji tabi diẹ sii papọ. Awọn isẹpo ká iyege da lori awọn ṣaju (fifuye dimole) ti a ṣe lakoko mimu, eyiti o jẹ iṣakoso nipasẹ ohun elo iyipo, okùn okùn, ati awọn edekoyede olùsọdipúpọ (μ) laarin awọn ipele ti nso ati awọn okun. Ninu apejọ iṣakoso iyipo, awọn onimọ-ẹrọ ṣe iyipada iṣaju iṣaju ibi-afẹde sinu iye iyipo nipa lilo awọn nut ifosiwewe (K ≈ 0.12-0.16 fun lubricated zinc-flake fasteners ti a bo).
Awọn paati ibarasun aṣoju ninu apejọ ti o tii pẹlu:
- Hex boluti / hex fila skru- okun kikun (DIN 933 / ISO 4017) tabi o tẹle ara (DIN 931 / ISO 4014), kilasi ohun-ini 8.8, 10.9, tabi 12.9;
- Awọn eso hex- ISO 4032 awọn eso boṣewa tabi ISO 4033 tinrin / eso jam, kilasi baamu si boluti;
- Alapin washers(DIN 125) ati orisun omi washers (DIN 127) - pinpin fifuye gbigbe ati ṣafikun resistance gbigbọn;
- Studs ati asapo ọpá- fun awọn asopọ flanged ati nipasẹ-bolted ijọ;
- Flange eso ati flange boluti- pẹlu awọn flanges ti o ni ibatan fun awọn sobusitireti rirọ.
Ọkọọkan awọn paati wọnyi gbọdọ pin eto idabobo ipata kanna; boluti Dacromet kan ti a so pọ pẹlu nut ti o ni sinkii lasan ṣẹda a galvanic tọkọtaya tí ó rúbọ èso ní àkọ́kọ́.
3. Ipata Resistance: Dacromet la miiran Bolt pari
Ifarada fun sokiri iyọ (ISO 9227 / ASTM B117, awọn wakati si ipata pupa) jẹ aami ile-iṣẹ fun aabo ipata fastener.
| Pari / bo eto | Sisanra | Awọn wakati si ipata pupa (NSS) | Ipata funfun (NSS) | Hydrogen embrittlement | Awọn akọsilẹ |
| Itele (awọ ara-ẹni, ororo) | — | < 24 wakati | — | Ko si | Lilo inu ile nikan |
| Pipin Zinc, chromate bulu (Zn3) | 5 μm | ≈ 48h | 12–24 wakati | Ga | Iye owo kekere, awọn ọja olumulo |
| Pipin Zinc, passivate ti o nipọn (Zn12) | 12 μm | ≈ 192 wakati | 96–168 wakati | Ga | Kii ṣe fun kilasi ≥ 10.9 |
| Darí galvanizing | 20-50 μm | 300-800 wakati | 200-400 wakati | O kere pupọ | O dara fun awọn ẹya nla |
| Fífibọ̀ gbigbona (HDG) | 45-85 μm | 500–1,500 wakati | 200-500 wakati | Kekere | Awọn okun nilo tun-tẹ ni kia kia |
| Dacromet Kilasi 2 | 8 μm | ≈ 720h | 300-500 wakati | Ko si | Bi-ge o tẹle konge |
| Dacromet Class 3 / dudu | 10-12 μm | ≈ 1,000 wakati | 500-720 wakati | Ko si | Oṣeto OEM ala |
Dacromet tun ṣe itọsi sinkii ninu Kesternich igbeyewo (SO₂ ipata, ISO 6988 - awọn bugbamu ile-iṣẹ ati ojo acid), ni idanwo ipata cyclic (CCT: ni idapo iyo sokiri / ọriniinitutu / gbigbe), ni galvanic ibamu pẹlu aluminiomu sobsitireti (o ṣeun si awọn aluminiomu flake akoonu), ni gigun kẹkẹ otutu (fiimu aiṣedeede duro iṣẹ 120-300 °C, nibiti o ti n roro ti awọn ohun elo Organic), ati ninu kemikali resistance si awọn iyọ opopona ati awọn kemikali de-icing.
4. Ipari
Fun awọn boluti hex ati ohun elo ibarasun wọn, ibora Dacromet n funni ni iwọntunwọnsi ti o dara julọ ti aabo ipata, iṣedede ẹrọ, ati igbẹkẹle apejọ ti o wa loni: ifarada sokiri iyọ to awọn wakati 1,000, ajesara si embrittlement hydrogen, geometry o tẹle ara ti a fipamọ, ati ija iduroṣinṣin fun apejọ iṣakoso iyipo. Nibikibi ti isẹpo ti o ti di gbọdọ ye ojo, iyọ, ati akoko, sipesifikesonu lati ranti ni: bolt hex agbara-giga, zinc-flake (Dacromet) ti a bo, ISO 10683 / ASTM F1136 ni ifaramọ.
