Mapaipi esimbi ane madziro akakora ane akawanda mabhenefiti, akadai seyepamusoro-tembiricha oxidation kuramba, yakasimba corrosion resistance, yakanaka plasticity, yakanakisa welding performance, etc., uye anoshandiswa zvakanyanya mundima dzakasiyana dzemaindasitiri. Nekudaro, nekuda kwekuoma kwakadzika uye kushomeka kwekushomeka kwesimbi isina tsvina, kushandiswa kwayo muzviitiko zvakawanda kuchave kushoma, kunyanya munzvimbo umo zvinhu zvakawanda zvakaita sekuora, kupfeka, uye mutoro unorema zviripo uye zvinokanganisa hupenyu hwesevhisi. simbi isina tsvina ichapfupikiswa zvakanyanya. Saka, nzira yekuwedzera kuoma kwepamusoro pepombi dzakakora-madziro dzesimbi isina tsvina?

Ikozvino kune nzira yekuwedzera kuomarara kwepasi kwepombi dzakakomberedzwa neion nitriding kuvandudza kusakara uye nekudaro kuwedzera hupenyu hwayo hwesevhisi. Zvisinei, austenitic Stainless steel pombi haigoni kusimbiswa nekuchinja kwechikamu, uye ion nitriding yakajairwa ine tembiricha yakakwira nitriding, inodarika 500 ° C. Chromium nitrides inonaya mu nitriding layer, ichiita iyo Stainless simbi matrix chromium-yakashata. Nepo kuomarara kwepamusoro kuchiwedzera zvakanyanya, kuomarara kwepasi kwepombi kunenge kwakadzikira zvakanyanya, nekudaro kurasikirwa nehunhu hwemapaipi akakora-madziro esimbi isina tsvina.

Kushandiswa kweDC pulse ion nitriding midziyo kurapa austenitic simbi pombi ine yakaderera-tembiricha ion nitriding inogona kukwidziridza kuomarara kwepaipi-yakavakirwa simbi pombi uku ichichengeta kusimba kwekuora kusachinjika, nekudaro vachiwedzera kusakara kwavo. Kuenzaniswa neion nitriding yakarapwa masampuli pane yakajairwa nitriding tembiricha, iyo data kuenzanisa iri pachena zvakare.

Kuedza kwakaitwa mu30kW DC pulse ion nitriding furnace. Iwo ma parameter eiyo DC pulse magetsi anogadziriswa voltage 0-1000V, inogadziriswa duty cycle 15% -85%, uye frequency 1kHz. Iyo tembiricha yekuyera system inoyerwa neiyo infrared thermometer IT-8. Izvo zvinhu zvemuenzaniso ndeye austenitic 316 gobvu-yakavezwa simbi isina tsvina pombi, uye makemikari ayo ari 0.06 kabhoni, 19.23 chromium, 11.26 nickel, 2.67 molybdenum, 1.86 manganese, uye imwe yese isimbi. Saizi yemuenzaniso ndeye Φ24mm×10mm. Pamberi pekuyedzwa, masampuli akakwenenzverwa nejecha remvura kuti abvise mavara emafuta, obva acheneswa nekuomeswa nedoro, obva aiswa pakati pecathode disk uye vacuumed kusvika pazasi 50Pa.

Iyo microhardness ye nitrided layer inogona kusvika pamusoro pe1150HV kana ion nitriding inoitwa paaustenitic 316 simbi isina tsvina yakashongedzwa mapaipi pakudziya kwakaderera uye kwakajairika nitriding tembiricha. Iyo nitrided layer inowanikwa nekudzika-tembiricha ion nitriding yakatetepa uye ine yakanyanya kuoma gradient. Mushure mekudzika-kupisa ion nitriding, kupfeka kusagadzikana kwesimbi austenitic kunogona kuwedzerwa ne 4-5 nguva, uye kushorwa kwekuora kunoramba kusingachinji. Kunyangwe kupfekedzwa kwekuramba kuchigona kukwidziridzwa ne4-5 nguva neion nitriding pane yakajairwa nitriding tembiricha, kusadzivirirwa kweaustenitic simbi isina tsvina mapaipi anodzikiswa kusvika pamwero wakati nekuti chromium nitrides inonaya pamusoro.