Ufa zitsulo zida

Kufotokozera Kwachidule:

Izi zimakhudzana ndi gawo lapadera lazitsulo zamafuta, chifukwa kachulukidwe, porosity, zida ndi njira zothetsera kutentha kwa magalasi azitsulo zimakhudza makamaka kuuma ndi mphamvu. Zida, kulimba kwambiri. Njira zochiritsira kutentha zimaphatikizapo kuzimitsa carburizing, carbonitriding, kuzimitsa kwapafupipafupi, kuzimitsa kwapafupipafupi, kuzimitsa mafuta, ndi zina.


Mankhwala Mwatsatanetsatane

Zogulitsa

Ubwino waukulu wazitsulo zamafuta ndikuti umapangidwa ndi zinthu zopangira sintered, kotero kusamba kwamafuta popeza mafutawa ndiabwino kwambiri, mawonekedwe a dzino ndi kukula kwake konse kumatha kupangidwa, osatinso kukonzanso kwina; Chosavuta ndichakuti pokhudzana ndi kukonza kwachikhalidwe zida, mphamvu ndizosakwanira, sizingathe kusunthira makokedwe akulu, kutsimikizika kwa dzino nthawi zambiri kumakhala kwa mulingo wa 6 ~ 9, kulondola kwake kwenikweni kumakhala mulingo wapamwamba kwambiri wa IT7 ~ 6.

Chitsulo cha ufa ndi ukadaulo watsopano wopanga, wokhala ndi zabwino zake, makamaka zoyenera kupanga. Koma sizomwe zimachitika nthawi zonse.Powder metallurgic processing imafuna kupanga kufa kofananira, pogwiritsa ntchito powdery chitsulo kudzera mu sintering ndi njira yofananira yopangira ziwalozo.Mphamvu imasiyanasiyana malinga ndi zomwe agwiritsa ntchito.

1. unyinji wazitsulo zotsitsimutsa ndimakina ake, ma alloys abodza, zida zopsereza zimatha kupangidwa ndi ufa wamafuta okhaokha.

2. chifukwa njira yachitsulo yamafuta imatha kukanikizidwa mpaka kukula kotsirizira, popanda kapena kufunika kocheperako kogwiritsira ntchito makina, itha kupulumutsa kwambiri chitsulo, kuchepetsa mtengo wazogulitsa. Kutaya kwazitsulo pakupanga zinthu ndi ufa wamafuta Njira ndi 1-5% yokha, pomwe kutayika kwazitsulo pakupanga zinthu ndi njira wamba yoponyera kumatha kukhala 80%.

3. chifukwa njira yazitsulo yopangira zinthu sizisungunuka, sizowopa kusakanikirana ndi zosafunika zomwe zimabweretsa mbiya ndi deoxidizer, ndipo sintering nthawi zambiri imachitika mosalongosoka ndikuchepetsa mpweya, osawopa makutidwe ndi okosijeni , ndipo sangapereke kuipitsa kulikonse pazinthuzo, ndizotheka kupanga zida zoyera kwambiri.

4. njira yachitsulo yamafuta imatha kutsimikizira kulondola ndi kufanana kwa kuchuluka kwakapangidwe kazinthu.

5. ufa wachitsulo ndi woyenera kupanga mawonekedwe omwewo komanso kuchuluka kwa zinthu, makamaka zida ndi zina zomwe zimagwiritsidwa ntchito pokonza zinthu, ndikupanga ufa wamafuta kumachepetsa kwambiri kupanga cos.

Kuuma kulamulira mankhwala onse ufa zitsulo pa kutentha mankhwala:

Kuchuluka kwa ufa wamba wa atomized (kuphatikiza chitsulo cha kaboni ndi chitsulo cha kaboni-kaboni aloyi) ndiposa 6.9, ndipo kuuma kolimba kumatha kuyang'aniridwa mozungulira HRC30.

Mwambiri, kachulukidwe ka ufa wopangidwa kale (AB ufa) umapitilira 6.95, ndipo kuuma kolimba kumatha kuwongoleredwa mozungulira HRC35.

Maphala oyambitsidwa kale okhala ndi kachulukidwe kuposa 6.95 ndikuzimitsa kulimba komwe kumayendetsedwa ku HRC40.

Zitsulo zamagetsi zopangidwa ndi zinthu zomwe zili pamwambazi zimakhala ndizokhazikika komanso zakuthupi, ndipo kuuma pambuyo pochizira kutentha kumakwaniritsa zofunikira, kotero kulimba kwawo kwamphamvu ndi kuponderezana kudzafika pachimake.

Kodi kuuma kwa kutentha kwa ufa wachitsulo kungafikire zitsulo 45? Inde mutha!

Komabe, chifukwa kuchuluka kwa zinthu za PM sikokwanira kuposa nambala ya 45 yachitsulo, kuchuluka kwa zinthu zomwe zimakakamizidwa ndi PM nthawi zambiri kumakhala 7.2 g / cm, pomwe kuchuluka kwa No. 45 chitsulo ndi 7.9 g / cm. ufa wamafuta kapena kutentha kwapafupipafupi kuposa HRC45 kumapangitsa kuti mankhwala azitsulo azikhala olimba chifukwa chazimitsa kwambiri, zomwe zimapangitsa mphamvu yazitsulo zopangira ufa.

Kenako, tifananitsa zida zopangira P / M ndi zida zopangira zida.

1. Kugwiritsa ntchito kwambiri zinthu, mpaka kuposa 95%

2. Palibe kapena kudula pang'ono kumafunika

3. Kusasintha kwamitundu yolinganiza bwino, kukhazikika bwino komanso kulondola kwambiri.

4. Kuyerekeza kwamphamvu: akatswiri opanga ufa wamafuta adakulitsa kapangidwe kazitsulo zachitsulo, ndipo kulimba kwamphamvu ndi kupondereza kwamagiya opangidwa ndizoyandikira pafupi ndi zida zosinthira. Mwachitsanzo, zida zamagalimoto zamagalimoto zomwe zimafalitsa kwambiri Mphamvu zowoneka ngati ufa wamafuta ndizothandiza komanso zochulukirapo.

5. Ufa kukanikiza akamaumba ntchito akamaumba nkhungu, zingabweretse zina kudula luso hob hob sangabweretse akalumikidzidwa zovuta.

6. Chifukwa ndioyenera kupanga zambiri, kupanga bwino kwake kumakhala kwakukulu ndipo mtengo wake ndi wotsika kuposa kudula.

7. Yoyenera kupanga misa, motero mtengo wake ndiwampikisano kwambiri.


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