I-Sintering kukubetha kwentliziyo ye-powder metallurgy-apho umgubo wentsimbi uguquka ube yinxalenye exineneyo, esebenzayo. Kwiziko lethu elisekelwe kwi-Qingdao, siye sacwina kwiibhetshi ze-12,000 ze-cobalt-nickel kunye neengxenye zensimbi ezingenasici ukususela ngo-2018. Yonke into engaphumelelanga yasifundisa into: amazinga okushisa abalulekile ngaphezu kwexesha eliphakamileyo lokubamba i-AMS 5387 imilomo; umoya ukucoceka kwenza okanye ukwaphula T800 alloy plug imfezeko; kunye nocando lwesithando somlilo luchaphazela ngokuthe ngqo uzinzo lwe-dimensional kwizindlu zepiston pump cylinder. Ezi aziyiyo imigqaliselo yeencwadi-zizifundo ezivela kwimigca yokwenyani yokuvelisa i-valve ye-hydraulic elinganiswe kwi-420 MPa kunye ne-winch center shaft rollers evezwe kwi-corrosion yetyuwa-spray kwiiyure ze-1,500 +.
ISintering eqhelekileyo: Kusenjalo Ihashe Lokusebenza-Xa Lifanelekile
Uninzi lwabathengi bacinga ukuba i-sintering eqhelekileyo ithetha "ukuyifudumeza nje emoyeni." Ayilunganga. Kwii-furnaces zethu ezihambelana ne-ISO, i-sintering eqhelekileyo ithetha ukulawula okuchanekileyo kwezinto ezintathu eziguquguqukayo: izinga lokushisa (ngokuqhelekileyo i-3-5 ° C / min), ukushisa okuphezulu (1120-1280 ° C kwiinsimbi ezingenasici, i-1320-1380 ° C ye-cobalt alloys), kunye nexesha lokuhlala (30-90 imizuzu). Sisebenzisa i-endothermic gas (umxube we-N₂–H₂) kwiindawo ezingenasici kunye ne-argon ephezulu yokucoca i-T800 kunye ne-AMS 5387-kuba ne-20 ppm oksijini ibangela i-oxidation yomhlaba eyonakalisa i-valve ye-valve yokutywina indawo. Le ndlela inikezela nge-92-95% yoxinaniso lwethiyori. Iyabiza kwaye iyaphinda-kodwa ayiyonxalenye edinga> 97% yoxinaniso okanye iijiyometri ezintsonkothileyo ezinodonga olubhityileyo. Siyayikhaba le ndlela yokusetyenziswa kwemilomo ye-cobalt alloy efuna i-zero ye-porosity yangaphakathi kwiindlela ezibalulekileyo zokuhamba.
I-Sintering eNcedwa ngoxinzelelo: Uxinaniso ngaphandle kokuLula
Xa abathengi bafuna ubuninzi obusondeleyo ngaphandle kwe-post-sinter machining, sitshintshela kwiindlela zokunceda uxinzelelo. I-Hot Isostatic Pressing (HIP) isebenzisa i-100-200 MPa uxinzelelo lwe-argon ngokufanayo ngelixa ukufudumeza-ukucinezela ama-pores aseleyo avaliwe. Sisebenzisa i-HIP kuzo zonke izindlu zepompo ze-AMS 5387 ezilungiselelwe i-oyile engaphantsi kolwandle kunye nenkonzo yegesi. Isiphumo? Ubuninzi be-99.8%, i-15% yobomi obuphezulu bokukhathala, kunye nokupheliswa kweziphene ze-micro-shrinkage ezibangela ukuvuza kwangaphambili kwizicelo eziphezulu. I-Spark Plasma Sintering (SPS) isebenza ngokuhlukileyo: i-pulsed DC current idlula ngokuthe ngqo kwi-powder compact, eyenza ukufudumeza kwe-ultra-fast (ukuya kwi-1000 ° C / min) kunye nexesha eliphantsi lokujikeleza. Sisebenzisa i-SPS yeprototype T800 amacandelo angekho kumgangatho apho ijometri ikhusela ukufudumeza okufanayo kwe-HIP-njengeziseko zempompo ze-asymmetrical kunye nezigubu ezikhulayo ezidibeneyo. Zombini iindlela zibiza i-2.3-3.7 × ngaphezu kwe-sintering eqhelekileyo-kodwa ukusika i-scrap nge-68% kwiindawo zemoto zobunjineli eziphezulu.
Izahluko eziLawulwa yi-Atmosphere: Apho iKhemistry idibana neJometri
I-Atmosphere ayikho nje malunga nokuthintela i-oxidation-ithatha inxaxheba ngokunyanisekileyo kwi-sintering. Kwi-hydrogen sintering, i-H₂ inciphisa i-oxides yomphezulu kwaye ikhuthaza ukusasazwa komphezulu. Siyisebenzisela ukuphoswa kwentsimbi efuna ukufikeleleka kwemagnethi kwi-hydraulic solenoid cores. Ukucoca i-vacuum sintering kuphelisa zonke iigesi ezisebenzayo kodwa kufuna ucoceko olungqongqo lomgubo-nayiphi na i-lubricant eshiyekileyo igubha ngamandla, ibangele amadyungudyungu. Sigcina ivacuum yeeplagi ze-cobalt alloy apho i-carbon pickup esuka kwi-nitrogen-based atmospheres inokuthoba izinga lobushushu obuphezulu bokunyuka. Kwisiseko sempompo yensimbi engenasici evezwe kwiindawo zekloride, songeza i-5% ye-hydrogen elawulwayo kwi-nitrogen ukuphumeza ukuncipha kwe-Cr₂O₃ ngokufanelekileyo ngaphandle kokunciphisa. Impazamo kumlinganiselo? Siye sabona i-0.3% ilahleko kumandla esivuno-kwaye sakhatywa i-172 kg yezinto eziphathekayo kwibhetshi enye.
Kutheni ukhetho lwakho lutshintsha yonke into-Ngaphaya koxinzelelo
Ubuninzi bubalulekile-kodwa yindawo yokuqala yokukhangela. Indlela yeSintering iyalela ubume bengqolowa, ukuhanjiswa kwesigaba, kunye noxinzelelo olushiyekileyo. I-sintering eqhelekileyo ye-17-4PH ivelisa iinkozo ezirhabaxa ezinciphisa ukunyamezela ukukhathala kwiivalvu zoxinzelelo. I-microstructures ehlanjululweyo ye-HIP ihambisa i-grainer, i-grains efanayo-ukwandisa ubomi benkonzo nge-4.2 × kwizilingo zentsimi. Umphezulu uyatshintsha kwakhona: Amalungu e-HIP afuna i-30% ngaphantsi kokusila kokugqibela ukubetha i-Ra ≤0.4 µm ebusweni bokutywina. Ulawulo lwe-Dimensional luhluke kakhulu-i-sintering eqhelekileyo iyancipha i-12-15% ngokulandelelana; I-HIP iyancipha nje i-0.8-1.3%, ivumela ukuba sibambe ± 0.02 mm kwizindlu ze-cylinder ze-280-mm-diameter ngaphandle komatshini wesibini. Kwaye imbali thermal ichaphazela machinability: T800 sintered eqhelekileyo oomatshini kwi-18 m / min; I-T800 ephathwa nge-HIP ifuna i-8 m/min ifidi mazinga kunye nokufakwa okukhethekileyo kwe-carbide. Senza imephu ezi zorhwebo ngexesha lophononongo lobunjineli-kungekhona emva kokuhlolwa kwenqaku lokuqala.
Ukuqonda iintlobo ze-sintering kwi-powder metallurgy factory imisebenzi yahlula iiprototypes ezisebenzayo kwiindawo zemveliso ezibaluleke kakhulu. E-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., sifanisa iqhinga le-sintering kwi-application physics-kungekhona nje i-database yempahla. Iivalvu zoxinzelelo lweHydraulic zifumana i-HIP. Ukufakwa kwentsimbi kumthamo ophezulu nokufumana i-hydrogen sintering. Imilomo yengxubevange yeCobalt ifuna i-zero porosity ifumana i-SPS. Ukhetho olufanelekileyo luqala ngemowudi yakho yokungaphumeleli-kungekhona ibhajethi yakho. Siqinisekisa zonke izigqibo ngokuchasene nomjikelo woxinzelelo lwehlabathi lokwenyani, ukuvezwa komhlwa, kunye nokunyamezelana. Ngenxa yokuba kumacandelo amashishini achanekileyo, ukuhlamba akusiyo inyathelo. Sisiseko.
