Sintering ndiko kurova kwemoyo kwepoda metallurgy — uko simbi isina hupfu inoshanduka kuita dense, inoshanda zvinhu. Panzvimbo yedu yeQingdao-based, takasvibisa pamusoro pe12,000 mabheji e-cobalt-nickel uye zvikamu zvesimbi zvisina tsvina kubvira 2018. Kumhanya kwese kwakakundikana kwakatidzidzisa chimwe chinhu: mazinga ekushisa anokosha kupfuura nguva yepamusoro yeAMS 5387 nozzles; kuchena kwemhepo kunoita kana kutyora T800 alloy plug kutendeseka; uye zoning yevira inokanganisa zvakananga kugadzikana kwepiston pombi silinda dzimba. Aya haasi mabhuku ekuongorora-ndizvo zvidzidzo kubva kumitsara yekugadzira chaiyo inobata mavharuvhu e hydraulic akaiswa ku420 MPa uye winch centre shaft rollers akafumurwa kune munyu-spray corrosion kwe1,500+ maawa.
Kuimba Kwakajairwa: Ichiri Bhiza Rekushanda—Kana Richikwana
Vatengi vazhinji vanofunga kuti kuridza kwakajairika kunoreva "kungopisa mumhepo." Zvakaipa. Mumavira edu anoenderana neISO, sintering yakajairika inoreva kudzora kwakaringana kwemhando nhatu: chiyero chekudziya (kazhinji 3-5 ° C / min), tembiricha yepamusoro (1120-1280 ° C yesimbi isina tsvina, 1320-1380 ° C yecobalt alloys), uye nguva yekugara (30-90 maminitsi). Isu tinoshandisa endothermic gasi (N₂–H₂ musanganiswa) yezvikamu zvisina tsvina uye yakakwirira-kuchena argon yeT800 uye AMS 5387-nekuti kunyange 20 ppm okisijeni inokonzera oxidation yepasi iyo inoparadza kudzvanywa kwevhavha chisimbiso nzvimbo. Iyi nzira inopa 92-95% theoretical density. Inodhura-inoshanda uye inodzokororwa-asi kwete yezvikamu zvinoda> 97% density kana yakaoma geometries ane madziro matete. Isu tinoramba nzira iyi yecobalt alloy nozzles inoda zero yemukati porosity munzira dzakakomba dzinoyerera.
Kudzvinyirira-Kunobatsirwa Sintering: Density Pasina Kukanganisa
Kana vatengi vachida pedyo-yakazara density pasina post-sinter machining, isu tinochinja kune kudzvanywa-kubatsirwa nzira. Kupisa Isostatic Kudzvanya (HIP) inoshandisa 100-200 MPa argon kudzvanywa zvakafanana panguva yekudziya-kudzvanya yakasara pores yakavharwa. Isu tinoshandisa HIP pane yega AMS 5387 pombi dzimba dzakagadzirirwa subsea mafuta & gasi sevhisi. Zvakaguma nei? 99.8% density, 15% yakakwirira kuneta hupenyu, uye kubviswa kwe micro-shrinkage kuremara izvo zvinokonzeresa kuvuza kwekutanga-kutenderera maapplication. Spark Plasma Sintering (SPS) inoshanda zvakasiyana: pulsed DC ikozvino inopfuura yakananga kuburikidza nehupfu compact, ichigonesa kupisa-kukurumidza kupisa (kusvika ku1000 ° C / min) uye yakaderera yakazara kutenderera nguva. Isu tinotumira SPS yeprototype T800 isiri-yakajairwa zvikamu uko geometry inodzivirira yunifomu yeHIP kudziyisa-senge asymmetrical pombi nheyo dzine akabatanidzwa anokwira makumbo. Nzira dzose dziri mbiri dzinodhura 2.3-3.7 × kupfuura yemazuva ose sintering-asi cheka zvimedu ne68% pazvikamu zvemotokari zveinjiniya.
Atmosphere-Controlled Variants: Iko Chemistry Inosangana neGeometry
Atmosphere haisi yekungoita kudzivirira oxidation - inoshingairira kutora chikamu mukuimba. Mune hydrogen sintering, H₂ inoderedza maokisi epamusoro uye inosimudzira kupararira kwepamusoro. Isu tinoishandisa kune simbi castings inoda magineti permeability mu hydraulic solenoid cores. Vacuum sintering inobvisa magasi ese anoshanda asi inoda kushambidzika kwehupfu-chero mafuta akasara anoputika zvine chisimba, zvichiita matuzu. Isu tinochengetera vacuum yecobalt alloy plugs uko kabhoni yekunhonga kubva kune nitrogen-yakavakirwa mumhepo inoshatisa yakakwirira-tembiricha inokambaira. Kune nheyo dzepombi dzesimbi dzisina tsvina dzakafumurwa kunharaunda dzechloride, tinowedzera inodzorwa 5% hydrogen kune nitrogen kuti iwane yakakwana Cr₂O₃ kuderedzwa pasina embrittlement. Kukanganisa reshiyo? Isu takaona 0.3% kurasikirwa musimba regoho-uye takaramba 172 kg yezvinhu mubatch rimwe.
Nei Sarudzo Yako Inochinja Zvese-Kupfuura Density
Density ine basa-asi ingori yekutanga yekutarisa. Sintering nzira inoraira chimiro chezviyo, kugovera chikamu, uye kusara kunetseka. Yakajairika sintering ye17-4PH isina goho inokora zviyo zvinodzikamisa kuneta kutsungirira mumavharuvhu ekumanikidza. HIP-yakanatswa microstructures inopa yakanakisa, yakawanda yunifomu zviyo-kuwedzera hupenyu hwebasa ne 4.2 × mumiedzo yemumunda. Kupedzwa kwepamusoro kunochinja zvakare: Zvikamu zveHIP zvinoda 30% zvishoma kukuya kwekupedzisira kurova Ra ≤0.4 µm pakusunga zviso. Dimensional control inosiyana zvakanyanya-yakajairika sintering inoderera 12-15% mutsara; HIP inodzikira chete 0.8-1.3%, ichitibvumira kubata ± 0.02 mm pa280-mm-diameter silinda dzimba pasina yechipiri machining. Uye nhoroondo yekupisa inokanganisa machinability: T800 sintered conventionally machines pa 18 m/min; HIP-yakarapwa T800 inoda 8 m/min feed rates uye specialized carbide kuisa. Isu tinomepu idzi dzekutengeserana panguva yekuongorora kweinjiniya-kwete mushure mekuongorora kwekutanga-chinyorwa.
Kunzwisisa mhando dze sintering muupfu metallurgy fekitori mashandiro anopatsanura anoshanda prototypes kubva kumishoni-yakakosha kugadzirwa zvikamu. KuQINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., Isu tinofananidza nzira yekuisa kune fizikisi yekushandisa-kwete chete zvinyorwa zvezvinhu. Hydraulic pressure valves inowana HIP. High-volume iron castings inowana hydrogen sintering. Cobalt alloy nozzles inoda zero porosity kuwana SPS. Sarudzo chaiyo inotanga nekutadza kwechikamu chako-kwete bhajeti yako. Isu tinosimbisa sarudzo dzese dzinopesana nechaiyo-nyika yekushushikana kutenderera, kuratidzwa kwecorrosion, uye kushivirira kwegungano. Nekuti mune chaiyo maindasitiri zvikamu, sintering haisi nhanho. Ndiyo nheyo.
