The makina katundu mabawuti amakhudzidwa ndi zopangira ndi kutentha mankhwala. Nthawi zambiri, zopangira zimakhudza kwambiri katundu wa ma bolts chifukwa katundu wa zipangizo amatsimikizira malire apamwamba a kutentha kutentha.. Mwachitsanzo, Zopangira zopanda Cr sizingakwaniritse kulimba kwa a 10.9 bawuti ya kalasi.

Nthawi zambiri, pamene makasitomala alibe zofunikira zenizeni, timalimbikitsa kudziwa zida zopangira bolt kutengera momwe kasitomala amagwiritsidwira ntchito. Mwachitsanzo, m'makampani omanga, tikulimbikitsidwa kugwiritsa ntchito mabawuti a kalasi 8.8 kapena apamwamba kwa zomangira zitsulo, komanso m'makampani opanga magalimoto, mabawuti a kalasi 10.9 kapena apamwamba amalimbikitsidwa kuti agwirizane.

Pamene makasitomala ali ndi zofunikira zenizeni za kalasi ya bawuti, timasankha mabawuti molingana ndi muyezo wa ISO898 wama bawuti a metric.

Izi ndi zofunika pa bawuti zopangira mu ISO898:

Katundu kalasiZakuthupi ndi kutentha chithandizoChemical kupanga malireKutentha kutentha
(kuponya kusanthula, %)a
CPSBb°C
min.max.max.max.max.min.
4.6c dChitsulo cha carbon kapena carbon steel ndi zowonjezera 0,550,0500,060Zomwe sizinafotokozedwe—-
4.8d-
5.6c0,130,550,0500,060
5.8d-0,550,0500,060
6.8d0,150,550,0500,060
8.8fMpweya wa carbon ndi zowonjezera (mwachitsanzo. Boron kapena Mn kapena Cr) kuzimitsidwa ndi kupsya mtima0,15e0,400,0250,0250,003425
kapena
Chitsulo cha carbon chozimitsidwa ndi kupsya mtima
kapena0,250,550,0250,025
Aloyi zitsulo kuzimitsidwa ndi mkwiyo0,200,550,0250,025
9.8fMpweya wa carbon ndi zowonjezera (mwachitsanzo. Boron kapena Mn kapena Cr) kuzimitsidwa ndi kupsya mtima0,15e0,400,0250,0250,003425
kapena
Chitsulo cha carbon chozimitsidwa ndi kupsya mtima
kapena0,250,550,0250,025
Aloyi zitsulo kuzimitsidwa ndi mkwiyo0,200,550,0250,025
10.9fMpweya wa carbon ndi zowonjezera (mwachitsanzo. Boron kapena Mn kapena Cr) kuzimitsidwa ndi kupsya mtima0,20e0,550,0250,0250,003425
kapena
Chitsulo cha carbon chozimitsidwa ndi kupsya mtima
kapena0,250,550,0250,025
Aloyi zitsulo kuzimitsidwa ndi mkwiyo0,200,550,0250,025
12.9f h ndiAloyi zitsulo kuzimitsidwa ndi mkwiyo0,300,500,0250,0250,003425
12.9f h ndiMpweya wa carbon ndi zowonjezera (mwachitsanzo. Boron kapena Mn kapena Cr kapena Molybdenum) kuzimitsidwa ndi kupsya mtima0,280,500,0250,0250,003380
a Pakakhala mkangano, kusanthula kwazinthu kumagwira ntchito.
b Zomwe zili ndi Boron zimatha kufikira 0,005 %, ngati boroni yosagwira ntchito imayendetsedwa ndi kuwonjezera titaniyamu ndi/kapena aluminiyamu.
c Kwa zomangira zoziziritsa kukhosi za makalasi a katundu 4.6 ndi 5.6, kutentha kwa waya wogwiritsidwa ntchito popanga kuzizira kapena kuzizira
fastener yokha ingakhale yofunikira kuti ikwaniritse ductility yofunikira.
d Chitsulo chodulira chaulere chimaloledwa pamakalasi azinthu awa okhala ndi sulfure wopitilira muyeso wotsatira,  phosphorous ndi zitsulo zamchere:S: 0,34 %; P: 0,11 %; Pb: 0,35 %.
e Pakakhala chitsulo chowoneka bwino cha boron chokhala ndi kaboni pansipa 0,25 % (kusanthula kwaposachedwa), manganese osachepera ayenera kukhala 0,6 % za katundu class 8.8 ndi 0,7 % kwa makalasi a katundu 9.8 ndi 10.9.
f Za zipangizo za makalasi a katunduwa,  padzakhala luso lolimba lokwanira kuti liwonetsetse kuti kamangidwe kamene kamakhala ndi
pafupifupi 90 % martensite pachimake cha zigawo za ulusi kwa zomangira mu "monga-zowumitsidwa" musanayambe kutentha. g Chitsulo cha aloyichi chizikhala ndi chimodzi mwazinthu zotsatirazi pazochepera zomwe zaperekedwa: chromium 0,30 %,  nickel 0,30 %, molybdenum 0,20 %, vanadium 0,10 %. Kumene zinthu zafotokozedwa mophatikiza ziwiri, atatu kapena anayi ndipo ali ndi aloyi zamkati zochepera zomwe zaperekedwa pamwambapa, mtengo wochepera womwe uyenera kugwiritsidwa ntchito pakutsimikiza kwamagulu azitsulo ndi 70 % za kuchuluka kwa malire omwe atchulidwa pamwambapa kwa awiriwo, zinthu zitatu kapena zinayi zokhudzidwa.
h Zomangira zopangidwa kuchokera ku phosphated zopangira ziyenera kupangidwa ndi dephosphate musanayambe kutentha; kusowa kwa phosphorous yoyera yolemeretsedwa wosanjikiza kuzindikirika ndi njira yoyenera yoyesera.
i Chenjezo akulangizidwa pamene ntchito katundu kalasi 12.9/12.9 imaganiziridwa. luso la chomangira wopanga, mikhalidwe yautumiki ndi njira zowononga ziyenera kuganiziridwa. Malo angayambitse kupsinjika kwa dzimbiri kung'ambika kwa zomangira zomwe zimakonzedwa komanso zokutidwa.

Ngati muli ndi mafunso ena okhudza kupanga mabawuti, pls mukumva kulumikizana nafe.

Sherry Cen

Zithunzi za JMET Malingaliro a kampani CORP., Gulu la Jiangsu Sainty International

Adilesi: Nyumba D, 21, Software Avenue, Jiangsu, China

Tel. 0086-25-52876434

WhatsApp:+86 17768118580

Imelo [email protected]