Pali zida zitatu zazikulu za ma bawuti a giredi 12.9 (12.9 wedge nangula, 12.9 kudzera pa bolt): nangula wachitsulo chosapanga dzimbiri, nangula wachitsulo chosapanga dzimbiri, ndi mkuwa.
(1) Chitsulo cha carbon (mongacarbon steel Wedge Anchor Bolts). Timasiyanitsa chitsulo chochepa cha carbon, sing'anga mpweya zitsulo, mkulu mpweya zitsulo ndi aloyi zitsulo zochokera mpweya zili zinthu mpweya zitsulo.
1. Chitsulo chochepa cha carbon ndi C% <0.25% nthawi zambiri chimatchedwa A3 zitsulo ku China. Kunja, amatchedwa 1008, 1015, 1018, 1022, etc.
2. Sing'anga mpweya zitsulo 0.25%
Chitsulo cha aloyi: Onjezani zinthu za aloyi kuzitsulo wamba wa kaboni kuti muwonjezere zinthu zina zapadera zachitsulo: monga 35, 40 chromium silver, SCM435
3. 10B38. Zomangira za Fangsheng makamaka zimagwiritsa ntchito zitsulo za SCM435 chromium-platinum alloy, zomwe zigawo zake zazikulu ndi C, Si, Mn, P, S, Cr, ndi Mo.
(2) Chitsulo chosapanga dzimbiri (monga ndodo zachitsulo zosapanga dzimbiri). Kalasi yochita: 45, 50, 60, 70, 80, makamaka austenite (18% Cr, 8% Ni), kukana bwino kutentha
Kukana kwa dzimbiri bwino komanso kuwotcherera kwabwino. A1, A2, A4 martensite ndi 13% Cr ali ndi vuto losachita dzimbiri, mphamvu zambiri komanso kukana kuvala bwino. C1,C
2. C4 ferritic chitsulo chosapanga dzimbiri. 18% Cr imakhala yabwinoko komanso kukana kwa dzimbiri kuposa martensite. Pakadali pano, zinthu zomwe zimatumizidwa kunja pamsika zimapangidwa makamaka ku Japan.
Kulawa. Malinga ndi mulingowo, imagawidwa makamaka SUS302, SUS304 ndi SUS316.
3) Mkuwa. Zida zomwe zimagwiritsidwa ntchito kwambiri ndi mkuwa…zinc-copper alloy. H62, H65, ndi H68 mkuwa amagwiritsidwa ntchito makamaka ngati magawo amsika.
12.9 Mphamvu ya zinthu zosiyanasiyana pazida za bawuti pazinthu zachitsulo:
1. Mpweya (C): Imalimbitsa mphamvu ya zitsulo, makamaka kutentha kwake, koma pamene mpweya wa carbon ukuwonjezeka, pulasitiki ndi kulimba kumachepa.
Ndipo izo zidzakhudza kuzizira kuwotcherera ntchito ndi kuwotcherera ntchito mbali zitsulo.
2. Manganese (Mn): Imalimbitsa mphamvu ya zigawo zachitsulo ndikupangitsa kuti zikhale zovuta kwambiri. Ndiko kunena kuti, mphamvu ya kulowa mkati molimba kumawonjezeka panthawi yopanga moto.
Ikhozanso kupititsa patsogolo khalidwe lapamwamba, koma manganese yochuluka kwambiri imawononga ductility ndi weldability. Ndipo zidzakhudza kuwongolera kwa zokutira panthawi ya electroplating.
3. Nickel (Ni): Imalimbitsa mphamvu ya zitsulo, imapangitsa kulimba pa kutentha kochepa, imapangitsa kuti zisawonongeke mumlengalenga, ndikuonetsetsa kuti kutentha kwakhazikika.
The mankhwala zotsatira ndi kuchepetsa zotsatira za hydrogen embrittlement.
4. Chromium (Cr): Ikhoza kupititsa patsogolo kuuma, kupititsa patsogolo kukana kuvala, kupititsa patsogolo kukana kwa dzimbiri, ndikuthandizira kukhalabe ndi mphamvu pa kutentha kwakukulu.
5. (Mo): Ikhoza kuthandizira kulamulira zokolola, kuchepetsa kukhudzidwa kwa zitsulo kuti zisawonongeke, ndikuthandizira kwambiri kupititsa patsogolo mphamvu zowonongeka pa kutentha kwakukulu.
Kukhudzidwa kwakukulu.
6. Boron (B): Ikhoza kupititsa patsogolo kuuma ndikuthandizira kupanga chitsulo chochepa cha carbon kutulutsa yankho loyembekezeredwa ku chithandizo cha kutentha.
7. Alum (V): imayenga mbewu za austenite ndikuwonjezera kulimba
8. Silicon (Si): Imatsimikizira mphamvu zazitsulo zazitsulo. Zomwe zili zoyenera zimatha kusintha pulasitiki ndi kulimba kwa zigawo zachitsulo.
Chitsulo cha 35CrMo ndi chinthu chabwino kwambiri cholumikizira mabawuti a injini ya giredi 129 ndipo chimatha kukwaniritsa zofunikira zamakina a zida za bawuti 12.9.
Ndi njira yotheka kutengera kutentha kwa nayitrogeni kwa 12.9 kalasi yolumikizira ndodo, kupatulira ndi kuziziritsa gawo la ndodo, ndikugudubuza ulusi pambuyo pochiritsa kutentha, ndipo zitha kupangidwa.
Pangani mabawuti apamwamba kwambiri, olondola kwambiri
Makalasi ogwirira ntchito a mabawuti omwe amagwiritsidwa ntchito polumikizana ndi zitsulo amagawidwa m'makalasi opitilira 10 monga 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, ndi 12.9.
Pakati pawo, mabawuti a giredi 8.8 ndi kupitilira apo amapangidwa ndi chitsulo chochepa cha carbon alloy kapena medium carbon steel ndipo akhala akutenthedwa ndi kutentha (ozimitsidwa ndi kupsya mtima), omwe amadziwika kuti ma bolts amphamvu kwambiri.
Ena onse amatchedwa mabawuti wamba. Cholembera cha kalasi ya bawuti chimakhala ndi magawo awiri a manambala, omwe amayimira mphamvu yamphamvu yokhazikika ya bawuti ndi
Zokolola-mphamvu chiŵerengero. Mwachitsanzo, bawuti yokhala ndi magwiridwe antchito 4.6 imatanthauza:
1. Mphamvu yokhazikika ya bawuti imafika 400MPa;
Kuchuluka kwa mphamvu zokolola za bawuti ndi 0.6:
2. Mphamvu zokolola mwadzina za zinthu za bolt zimafikira 400 × 0.6 = 240MPa mlingo wa ntchito 10.9 mabawuti amphamvu kwambiri. Zinthu zatenthedwa
3. Pambuyo pokonza, imatha kukwaniritsa:
1. Chovala cha bawuti chimakhala ndi mphamvu yokhazikika ya 1000MPa.
2. Chiŵerengero cha zokolola ndi mphamvu za bolt ndi 0.9:
3. Mphamvu yotulutsa mwadzina ya bawuti imafika pamlingo wa 1000×0.9=900MPa
10.9 kalasi zomangira amafuna sing'anga mpweya aloyi zitsulo quenching ndi kutentha kutentha mankhwala, monga 35CRMO 40CR ndi zipangizo zina.
Bolt grade inspection index ndi mphamvu yolimba ya bawuti. Sichoncho't zilibe kanthu kuti zinthuzo ndi chiyani, chiyani'Chofunika kwambiri ndi zizindikiro zamakina monga kulimba kwamphamvu
Nthawi yotumiza: Apr-16-2024