Mhepo yeSintering muMIM

Mamiriro ekunze panguva yekuita sintering ndiyo yakakosha yeMIM tekinoroji, inosarudza sintering mhedzisiro uye yekupedzisira kuita kwezvigadzirwa.Nhasi, tichataura nezvazvo, iyo Atmosphere yeSintering.

Basa reSintering atmosphere:

1) Dewaxing zone, bvisa lubricant mumuviri wakasvibira;

2) Deredza maokisi uye kudzivirira oxidation;

3) Dzivisa chigadzirwa decarburization uye carburization;

4) Dzivisa oxidation yezvigadzirwa munzvimbo yekutonhora;

5) Chengetedza kumanikidzwa kwakanaka muchoto;

6) Chengetedza kuenderana kwekuita sintering mhinduro.

The Classification of sintering atmosphere:

1) Oxidizing atmosphere: Pure Ag kana Ag-oxide composite zvinhu uye sintering of oxide ceramics: Mhepo;

2) Kuderedza mamiriro ekunze: Sintering atmosphere ine H2 kana CO components: Hydrogen atmosphere for cemented carbide sintering, Hydrogen-containing atmosphere ye iron-based and copper-based powder metallurgy parts (ammonia decomposition gas);

3) Iinert kana kusarerekera mamiriro: Ar, Iye, N2, Vacuum;

4) Carburizing atmosphere: ine zvinhu zvakakwirira zvinokonzera carburization yemuviri wakasvibiswa, zvakadai seCO, CH4, uye Hydrocarbon magasi;

5) Nitrogen-based atmosphere: Iine high nitrogen content sintering atmosphere: 10% H2+N2.

Iyo Reforming Gasi:

Kushandisa hydrocarbon gasi (gasi rechisikigo, petroleum gasi, coke oven gasi) semidziyo, uchishandisa mhepo kana mhute yemvura kuita pakupisa kwakanyanya, uye zvinoguma H2, CO, CO2, uye N2.Aount diki yegasi rakasanganiswa CH4 neH2O.

Iyo Exothermic Gasi:

Paunenge uchigadzira gasi rekugadzirisa, gasi rinoshandiswa nemhepo zvinopfuura nemushanduri mune imwe chikamu.Kana chiyero chemhepo kune yakasvibirira gasi yakakwira, kupisa kunoburitswa panguva yekupindura kwakaringana kuchengetedza kuita tembiricha yekushandura, pasina kudikanwa kwekunze kune iyo reactor kudziyisa, iyo inokonzeresa kutendeuka gasi.

Iyo Endothermic Gasi:

Paunenge uchigadzira gasi rakagadziridzwa, kana reshiyo yemhepo kune gasi yakasvibiswa yakaderera, kupisa kunoburitswa panguva yekupindura hakuna kukwana kuchengetedza kuita tembiricha yemugadziri, uye reactor inoda kupihwa kupisa kubva kunze.Gasi rakagadziridzwa rakazobuda rinonzi Endothermic Gas.

TheAtmosphere Carbon Potentialndiyo yakaenzana kabhoni yemukati memhepo, iyo yakaenzana neiyo kabhoni yemukati mune izvo zvinhu apo mhepo uye iyo sintered zvinhu ine imwe kabhoni inosvika pakuita equilibrium (hapana carburization, hapana decarburization) pane imwe tembiricha.

Uye theInodzora Carbon Inogoneka Atmospherendiro izwi rakajairika reyakagadzirirwa gasi svikiro yakaunzwa mune sintering system kudzora kana kugadzirisa iyo kabhoni yemukati yesimbi sintered.

Makiyi ekudzora huwandu hwe CO2 uye H2Omumhepo:

1) Kudzora kweH2O huwandu-dova point

Dew Point: Tembiricha apo mhute yemvura iri mumhepo inotanga kumonereka kuita mhute pasi pekumanikidzwa kwemhepo.Kuwanda kwemvura mumhepo, ndiko kuwedzera kwedova.Iyo dova inogona kuyerwa nedova point mita: iyo mvura yekunyudza conductivity kuyerwa uchishandisa LiCI.

2) Dzora huwandu hwe CO2 uye kuyerwa ne infrared absorption analyzer.