Chifukwa cha kuwonongeka kwa mphete

Zomwe zimayambitsa kufa kwa mphete ndizovuta ndipo ziyenera kufufuzidwa mwatsatanetsatane.Koma zikhoza kufotokozedwa mwachidule monga zifukwa zotsatirazi.

1. Zomwe zimagwiritsidwa ntchito mu nkhungu ya mphete ndi chimodzi mwa zifukwa zofunika.Pakadali pano, 4Cr13 ndi 20CrMnTid amagwiritsidwa ntchito makamaka m'dziko lathu, lomwe ndi lokhazikika.Koma opanga zinthu ndizosiyana, chifukwa cha zinthu zomwezo, kufufuza zinthu kudzakhala ndi kusiyana kwina, zimakhudza ubwino wa nkhungu ya mphete.

2. Kupanga njira.Uwu ndi ulalo wofunikira pakupanga nkhungu.Pakuti nkhungu mkulu aloyi zitsulo, zofunika kugawa zinthu carbide ndi zina metallographic dongosolo nthawi zambiri amaika patsogolo.Ndikofunikiranso kuwongolera mosamalitsa kusiyanasiyana kwa kutentha, kupanga mawonekedwe otenthetsera olondola, kugwiritsa ntchito njira yoyenera yopangira, komanso kuziziritsa pang'onopang'ono kapena kuyatsa panthawi yake mutatha kupanga.Non-standard ndondomeko n'zosavuta kutsogolera mng'alu wa mphete kufa thupi.

3. Konzekerani chithandizo cha kutentha.Malinga ndi zida zosiyanasiyana ndi zofunika za kufa, annealing, tempering ndi njira zina kukonzekera kutentha mankhwala ankalemekeza ntchito kusintha kapangidwe, kuthetsa zofooka dongosolo forging ndi akusowekapo, ndiye kusintha workability.Pambuyo kukonzekera bwino kutentha mankhwala a mkulu mpweya aloyi zitsulo kufa, maukonde carbide akhoza kuthetsedwa, zomwe zingapangitse carbide spheroidized ndi woyengedwa, ndi kugawa kufanana carbide akhoza kulimbikitsa.Izi zimathandiza kuonetsetsa kuzimitsa, kutentha khalidwe, kusintha moyo utumiki nkhungu.

Pellet mphero kufa kutentha mankhwala
1. Kuzimitsa ndi kutentha.Uwu ndiye ulalo wofunikira pakuchiritsa kutentha kwakufa.Ngati kutenthedwa kukuchitika panthawi yozimitsa kutentha, sikungoyambitsa kuwonongeka kwakukulu kwa workpiece, komanso kosavuta kuyambitsa mapindikidwe ndi kuphulika panthawi yozizira, zomwe zidzakhudza kwambiri moyo wautumiki wa nkhungu.Njira yopangira chithandizo cha kutentha iyenera kuyendetsedwa mosamalitsa ndipo chithandizo cha kutentha kwa vacuum chiyenera kutengedwa.Tempering zichitike mu nthawi pambuyo quenching, ndipo malinga ndi luso zofunika kutengera osiyana tempering ndondomeko.

2. Annealing-stress-relieving annealing.Nfayo iyenera kuchitidwa chithandizo chochepetsera kupanikizika pambuyo pokonza makina ovuta, kuti athetse kupsinjika kwamkati komwe kumachitika chifukwa cha makina okhwima, kuti apewe kuwonongeka kwakukulu kapena kung'ambika chifukwa cha kuzimitsa.Kwa kufa komwe kumafunikira kulondola kwambiri, kumafunikanso kulandira chithandizo chochepetsera kupsinjika pambuyo pogaya, komwe kumapindulitsa kukhazikika kwakufa ndikuwongolera moyo wautumiki.

Kutsegula dzenje mlingo wa mphete kufa
Ngati kutsegulira kwa dzenje la mphete ndipamwamba kwambiri, kuthekera kwa kusweka kwa mphete kumawonjezeka.Chifukwa cha mitundu yosiyanasiyana ya chithandizo cha kutentha ndi ndondomeko, padzakhala kusiyana kwakukulu pakati pa wopanga mphete iliyonse.Nthawi zambiri, mphero yathu ya mphero imatha kusintha kuchuluka kwa dzenje ndi 2-6% pamaziko a nkhungu yamtundu woyamba, ndipo imatha kutsimikizira moyo wautumiki wa nkhungu ya mphete.

Pellet mphero amavala
makulidwe ena ndi mphamvu zimachepetsedwa mpaka sizingathe kupirira kupanikizika kwa granulation, kusweka kudzachitika.Ndikofunikira kuti mphete ikafa ikavala kufika pamlingo womwe chipolopolo cha chipolopolo chofanana, mpheteyo iyenera kusinthidwa munthawi yake.
Pamene mphero ya pellet ifa panthawi ya granulation, kuchuluka kwa zinthu zomwe zili mu mphero sizingayende pa 100%. kumayambitsa kusweka kwa mphete kufa.Tikukulimbikitsani kuwongolera pa 75-85% ya katundu kuti muwonetsetse kuti moyo wautumiki wa mphete umafa.
Ngati mpheteyo ifa ndipo makina osindikizira akanikizidwa mwamphamvu kwambiri, ndizosavuta kusweka.Nthawi zambiri, timafunikira kuti mtunda pakati pa mphete kufa ndi makina osindikizira uwongoleredwe pakati pa 0.1-0.4mm.

zosiyanasiyana
Ndikosavuta kung'amba pamene zinthu zolimba monga chitsulo zikuwonekera m'mapangidwe a pellets.

Kuyika makina a mphete ndi ma pelleting
Kuyika kwa mphete kufa sikuli kolimba, padzakhala kusiyana pakati pa mphete kufa ndi makina opangira ma pelleting, ndipo kuphulika kwa mphete kudzachitikanso panthawi ya pelleting.
Pambuyo pa chithandizo cha kutentha, mpheteyo imafa imakhala yopunduka kwambiri.Ngati sichikonzedwa, mphete ya mpheteyo idzaphwanyidwa ndikugwiritsidwa ntchito.
Pamene makina a pelleting ali ndi zolakwika, monga tsinde lalikulu la makina otsekemera akugwedezeka.