Mkhalidwe wa Sintering mu MIM

Mlengalenga panthawi ya sintering ndiye nsonga yofunika kwambiri paukadaulo wa MIM, imasankha zotsatira za sintering komanso magwiridwe antchito omaliza azinthu.Lero, tikambirana za Atmosphere of Sintering.

Udindo wa sintering atmosphere:

1) Dewaxing zone, kuchotsa lubricant mu thupi wobiriwira;

2) Kuchepetsa oxides ndi kupewa makutidwe ndi okosijeni;

3) Pewani decarburization mankhwala ndi carburization;

4) Pewani makutidwe ndi okosijeni azinthu m'malo ozizira;

5) Pitirizani kupanikizika kwabwino mu ng'anjo;

6) Sungani kusasinthika kwa zotsatira za sintering.

Gulu la sintering atmosphere:

1) Oxidizing mpweya: Koyera Ag kapena Ag-osayidi gulu zipangizo ndi sintering wa oxide ceramics: Mpweya;

2) Kuchepetsa mpweya: Sintering atmosphere yomwe ili ndi zigawo za H2 kapena CO: Mpweya wa haidrojeni wopangira simenti ya carbide, mpweya wokhala ndi haidrojeni wa zitsulo zopangidwa ndi chitsulo ndi zamkuwa (gesi wovunda wa ammonia);

3) Mkhalidwe wosalowerera kapena wosalowerera ndale: Ar, He, N2, Vacuum;

4) Carburizing atmosphere: ili ndi zigawo zazikulu zomwe zimayambitsa carburization ya thupi la sintered, monga CO, CH4, ndi mpweya wa Hydrocarbon;

5) Mpweya wa nayitrojeni: Wokhala ndi mpweya wambiri wa nayitrogeni: 10% H2+N2.

The Reforming Gasi:

Kugwiritsa ntchito gasi wa hydrocarbon (gasi wachilengedwe, gasi wamafuta, mpweya wa uvuni wa coke) ngati zopangira, pogwiritsa ntchito mpweya kapena mpweya wamadzi kuti uchite pa kutentha kwambiri, ndi zotsatira zake za H2, CO, CO2, ndi N2.Kagawo kakang'ono ka gasi wosakanikirana wa CH4 ndi H2O.

Gasi wa Exothermic:

Pokonzekera gasi wokonzanso, mpweya wamafuta ndi mpweya umadutsa pachosinthiracho mugawo linalake.Ngati chiŵerengero cha mpweya ndi zopangira mpweya ndi mkulu, kutentha anamasulidwa pa anachita ndi okwanira kusunga anachita kutentha kwa Converter, popanda kufunika kunja kwa riyakitala Kutentha, chifukwa kutembenuka mpweya.

Gasi wa Endothermic:

Pokonzekera mpweya wokonzedwanso, ngati chiŵerengero cha mpweya ndi mpweya waiwisi ndi wochepa, kutentha komwe kumatulutsidwa panthawiyi sikukwanira kusunga kutentha kwa wokonzanso, ndipo riyakitala iyenera kuperekedwa ndi kutentha kuchokera kunja.Gasi wosinthidwawo amatchedwa Endothermic Gas.

TheAtmosphere Carbon Potentialndi wachibale mpweya zili mu mlengalenga, amene ali wofanana ndi mpweya zili mu zinthu pamene mlengalenga ndi zinthu sintered ndi mpweya wina kufika pa mmene anachita equilibrium (palibe carburization, palibe decarburization) pa kutentha kwina.

Ndipo theControllable Carbon Potential Atmospherendi mawu ambiri okonzekera gasi sing'anga anayambitsa sintering dongosolo kulamulira kapena kusintha mpweya zili sintered zitsulo.

Makiyi owongolera kuchuluka kwa CO2 ndi H2Omumlengalenga:

1) Kuwongolera kwa H2O kuchuluka kwa mame

Dew Point: Kutentha kumene mpweya wa madzi mumlengalenga umayamba kusungunuka kukhala nkhungu pansi pa mphamvu ya mumlengalenga.Madzi akachuluka m’mlengalenga, m’pamenenso mame amachuluka.Mame amatha kuyeza ndi mita ya mame: muyeso wa mayamwidwe amadzi pogwiritsa ntchito LiCI.

2) Kuwongolera kuchuluka kwa CO2 ndikuyezedwa ndi chowunikira cha mayamwidwe a infuraredi.