Sintering mushonga wekupisa unoshandiswa kune poda compact kuitira kupa simba nekuvimbika.Tembiricha inoshandiswa pakunyungudika iri pazasi pekunyungudika kwechikamu chikuru chePowder Metallurgy material.

Mushure mekubatana, zvidimbu zvehupfu zvakavakidzana zvinobatanidzwa pamwe chete nemhepo inotonhora, iyo inopa compact yakakwana "simba rakasvibirira" rinobatwa.Pakupisa tembiricha, maitiro ekupararira anoita kuti mitsipa iumbe uye ikure panzvimbo idzi dzekusangana.

Pane maviri anodiwa anotangira iyi "solid state sintering" nzira isati yaitika:
1.Kubviswa kwemafuta anotsikirira nekuputika uye kupisa kwemhepo
2.Kuderedzwa kwemaokisi epamusoro kubva pahupfu hwehupfu mu compact.

Aya nhanho uye iyo sintering maitiro pachayo anowanzo kuwanikwa muchoto chimwe chete, chinoenderera nesarudzo ine hungwaru uye yekumisikidzwa kwemhepo yechoto uye nekushandisa yakakodzera tembiricha chimiro muchoto chose.

Sinter kuomesa

Sintering furnaces iripo iyo inogona kushandisa yakakwirisa kutonhora mazinga munzvimbo yekutonhodza uye zvinhu mamakisi akagadzirwa anogona kushandura kuita martensitic microstructures pamitengo yekutonhora iyi.Iyi nzira, pamwe chete nekuzotevera kurapwa kwehasha, inozivikanwa se sintering harding, maitiro akabuda, mumakore achangopfuura, ane nzira inotungamira yekusimudzira sintered simba.

Transient liquid phase sintering

Mune compact inongori nesimbi yehupfu zvidimbu, iyo yakasimba state sintering process yaizoburitsa kumwe kuderera kweiyo compact sezvo mitsipa inopenya inokura.Nekudaro, tsika yakajairika ine ferrous PM zvinhu ndeyekuita wedzero yehupfu yemhangura yakatsetseka kugadzira chikamu chemvura chipfupi panguva yekupisa.

Patembiricha yekupisa, mhangura inonyunguduka yobva yapararira muzvidimbu zvesimbi zvoita kuzvimba.Nekunyatsosarudzwa kwemhangura yemhangura, zvinokwanisika kuenzanisa kuputika uku kunopesana nekuderera kwechisikigo chesimbi poda skeleton uye kupa zvinhu zvisingashanduki muhukuru zvachose panguva yekupisa.Iyo yekuwedzera yemhangura inopawo inobatsira yakasimba mhinduro yekusimbisa maitiro.

Permanent liquid phase sintering

Kune zvimwe zvinhu, senge simende carbides kana hardmetals, sintering masisitimu inosanganisira chizvarwa chechigarire chemvura chikamu chinoiswa.Rudzi urwu rwemvura yechikamu sintering inosanganisira kushandiswa kwekuwedzera kune hupfu, iyo inonyunguduka pamberi pechikamu che matrix uye iyo inowanzogadzira iyo inonzi inonzi binder chikamu.Iyo nzira ine matanho matatu:

Rearrangement
Sezvo mvura ichinyunguduka, capillary chiito chinokwevera iyo mvura mumapores uye zvakare ikonzeresa zviyo kuti zvigadzirike kuita inoyevedza kurongedza hurongwa.

Solution-precipitation
Munzvimbo dzine capillary pressure yakakwira, maatomu anozongopinda mumhinduro yobva yanaya munzvimbo dzine makemikari akadzikira uko zvimedu zvisiri pedyo kana kusangana.Izvi zvinonzi kubata flattening uye densifies sisitimu nenzira yakafanana neyezviyo muganhu diffusion mune yakasimba state sintering.Kuibva kweOstwald kuchaitikawo uko zvimedu zvidiki zvinopinda mumushonga zviri nani uye kunaya pazvimedu zvakakura zvinotungamira mukuzara.

Final densification
Densification yeyakasimba skeletal network, kufamba kwemvura kubva munzvimbo dzakanyatsorongedzerwa kupinda pores.Kuti kunyungudika kwechinyakare kwechikamu chemvura kushande, chikamu chikuru chinofanirwa kunyungudika zvishoma muchikamu chemvura uye chinowedzerwa che "binder" chinofanira kunyunguduka kusati kwanyanya kunyunguduka kweiyo solid particulate network yaitika, zvikasadaro kurongekazve kwezviyo hakuzoitika.