Ngati mukufuna kuchita ntchito yabwino yochizira kutentha kwa fastener, mfundo zazikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzikuluzigwira!

Fastener kutentha mankhwala, kuwonjezera kuyendera ambiri khalidwe ndi kulamulira, pali ena apadera khalidwe anayendera ndi kulamulira, tsopano ife timati kutentha mankhwala angapo ulamuliro mfundo.

01 Decarburization ndi carburization

Kuti mudziwe nthawi yake yowongolera mpweya wa ng'anjo, mutha kugwiritsa ntchito kuzindikira kwa spark ndi kuyesa kwa Rockwell kuuma kwa decarburization ndi carburization pakuweruza koyambirira.

Spark test.

Ndi mbali kuzimitsidwa, mu chopukusira kuchokera pamwamba ndi mkati mokoma akupera spark chiweruzo pamwamba ndi mtima wa carbon kuchuluka ndi zogwirizana. Koma izi zimafuna kuti wogwiritsa ntchitoyo akhale ndi luso laluso ndi zokoka kuti azindikire luso.

Rockwell kuuma mayeso.

Imachitidwa pambali ya bolt ya hexagonal. Choyamba, mbali zolimba za ndege ya hexagonal yokhala ndi sandpaper yopukutidwa pang'onopang'ono, imayeza kuuma koyamba kwa Rockwell. Ndiye pamwamba mu sander pogaya kutali za 0.5mm, ndiyeno kuyeza kuuma Rockwell.

Ngati kuuma mtengo wa nthawi ziwiri kwenikweni chimodzimodzi, kuti ngakhale decarburization, kapena carburization.

Pamene kuuma wakale ndi wotsika kuposa kuuma kotsiriza, zikutanthauza kuti pamwamba ndi decarburized.

Akale kuuma ndi apamwamba kuposa otsiriza kuuma, kuti padziko carburization.

Nthawi zambiri, kuuma kuwiri kwa 5HRC kapena kuchepera, ndi njira ya metallographic kapena microhardness njira, mbali za decarburization kapena carburization zili mkati mwakuyenerera.

02 Kuuma ndi mphamvu

Mu ulusi chomangirira mayeso, sangakhoze basi zochokera kuuma mtengo wa buku zogwirizana, kusandulika mphamvu mtengo. Pali chinthu chowumitsa pakati.

Kawirikawiri, kuuma kwa zinthuzo ndi kwabwino, kuuma kwa gawo la chigawo cha wononga kungathe kugawidwa mofanana, malinga ngati kuuma kuli koyenerera, mphamvu ndi kuonetsetsa kuti kupanikizika kungathenso kukwaniritsa zofunikira;

Pamene kuuma kwa zinthu kumakhala kovutirapo, ngakhale molingana ndi gawo lolembedwa la cheke, kuuma kumakhala koyenerera, koma mphamvu ndi chitsimikizo kupsinjika nthawi zambiri sizimakwaniritsa zofunikira. Makamaka pamene pamwamba kuuma amakonda malire m'munsi, pofuna kulamulira mphamvu ndi chitsimikizo maganizo mu oyenerera osiyanasiyana, nthawi zambiri bwino m'munsi malire mtengo wa kuuma.

03 Kuchepetsa mayeso

Retempering mayeso angayang'ane quenching kuuma sikokwanira, ndi otsika kwambiri kutentha tempering kuti n'kosavuta kufika kuuma kwapadera osiyanasiyana ntchito yolakwika, kuonetsetsa kuti mabuku mawotchi zimatha mbali.

Makamaka otsika mpweya martensitic zitsulo kupanga zomangira ulusi, otsika kutentha kutentha, ngakhale zina makina katundu akhoza kukwaniritsa zofunika, koma muyeso wa kupsinjika maganizo, otsalira elongation kusinthasintha ndi lalikulu kwambiri, kwambiri kuposa 12.5um, ndi zina ntchito. adzakhala mwadzidzidzi fracture chodabwitsa, mu magalimoto ena ndi kumanga mabawuti, waonekera chodabwitsa cha kusweka mwadzidzidzi.

Pamene otsika tempering kutentha tempering, akhoza kuchepetsa chodabwitsa pamwamba, koma ndi otsika mpweya martensitic zitsulo kupanga mabawuti 10,9 kalasi, ayenera kusamala makamaka.

04 Kuyang'ana kwa hydrogen embrittlement

Chiwopsezo cha hydrogen embrittlement chimawonjezeka ndi mphamvu ya chomangira. Zomangira zomangira zakunja za giredi 10.9 ndi kupitilira apo, zomangira zolimba zolimba pamadzi, zomangira zomata zomangira zitsulo zowuma, ndi zina zotere ziyenera kuchotsedwa madzi pambuyo poti plating.

Chithandizo cha dehydrogenation nthawi zambiri chimakhala mu ng'anjo kapena ng'anjo yotentha, yogwira pa 190 ~ 230.℃kwa nthawi yopitilira 4h, kotero kuti hydrogen kufalikira.

"Chitsulo chikufunikabe kulimba kwake!" Ziribe kanthu momwe msika ukusintha, kuyeretsa njira zopangira ndi imodzi mwa njira zothandiza zopewera zoopsa.

Mu njira yochizira kutentha kwa fastener, mosakayika ndikofunikira kwambiri kuchita ntchito yabwino pazowongolera zazikulu, zomwe ndi chimodzi mwazinthu zomwe bizinesi iliyonse yabwino yochizira kutentha iyenera kuchita bwino.