Metal jekiseni kuumba⎮Upfu Metallurgy⎮Nezvedu
• Kugadzira hupfu ndiyo nhanho yechipiri yehupfu hwesimbi. Iyo inzira iyo yakasununguka poda inogadzirwa kuita mabheti ane imwe chimiro, saizi, density uye simba.
• Powder kuburikidza nekugadzira nzira kuti uwane chimiro chakapiwa uye simba remuviri wehupfu, unonzi compact.
Kune nzira dzakawanda dzekugadzira hupfu, kuwedzera kune yakajairwa nzira yekuumba, mamwe anoiswa seyakakosha nzira dzekuumba. Kugadzira kufa ndiyo nzira yakakosha.
kushaya dhindi rekugadzira - pulp casting - loose sintering
Aya anotevera maitiro anoshandiswa kugadzira zvinhu: kumanikidza, kufa, kupisa, isostatic, rolling, centrifugal, extrusion, uye kuputika.
• Nzira dzakakosha dzekugadzira;
•kuumba zvakajairika;
•upfu pretreatment;
• dzidziso yekudzvinyirira
Powder pretreatment inosanganisira annealing, kuongorora, kusanganisa, granulating, uye kuwedzera mafuta ekuzora, pakati pezvimwe zvinhu.
Ordinary powder die forming
Die forming ndiyo inonyanya kushandiswa nzira yekugadzira hupfu. Inoreva nzira yekuisa poda yakavhenganiswa yakaenzana muforoma yakavharwa mune imwe chiyero patembiricha yekamuri, wobva waitsikirira mubillet ine imwe unit unit pressure by press.
Iyi nzira yekugadzira inowanzova nematanho anotevera: kuyeresa hupfu, hupfu hwekuzadza, kudzvanya, kubata kumanikidza uye kubvisa.
Nheyo yekuumba
(1) Shandisa chakuvhe kuti upe hupfu hwaunoda.
(2) Ipa muviri pakukura kwawo chaiko.
(3) Nyora iyo billet inodiwa porosity uye mhando yeporosity.
(4) Ipa muviri nehuwandu hwakakodzera hwesimba uye density yekubata.
Kutsikirira nzira
Unidirectional kudzvanya: iyo concave inofa uye yepasi punch haifambi, uye iyo yepamusoro punch yakamanikidzwa unidirectional.
Two-way pressing: iyo concave die inogadziriswa, uye iyo yepamusoro uye yakaderera punch inotsikirirwa panguva imwe chete ine yakaenzana uye inopesana nekumanikidza.
Inoyangarara kudzvanya: iyo yepasi punch yakagadziriswa, iyo concave kufa inotsigirwa nezvitubu, masilinda, masilinda, nezvimwe, uye inogona kuyangarara mushure mekusimbiswa.
Kudzvanya maitiro
Iyo yekutsikirira maitiro inogona kukamurwa mumatanho mana:
(1) Hupfu hunofamba, maburi anoderera, uye zvimedu zvinosvina;
(2) Hupfu hunodzvinyirirwa zvakasimba, uye zvidimbu zviduku zvinozadzwa mugomba pakati pezvikamu zvakakura, uye zvikamu zvinotanga kukanganisa;
（3） Iyo concave uye convex chikamu chepamusoro pehupfu hwehupfu inotsikirirwa uye meshed mune yakasimba yekusangana mamiriro;
(4) Basa rekuomesera kwezvikamu zvehupfu kusvika kumuganhu wenyika, kuwedzera kuwedzera kudzvinyirira, zvikamu zvehupfu zvinoparadzwa uye crystallization inonatswa.
Ukama huri pakati pekuoma kwesimbi poda nekudzvanyirira
| Upfu mhando | kusimba kuri kuita /(g/cm3) | kuomararaHBW | Simba rekudzvanya rinodiwa kuti compact iwane 60% hama density /MPa | Simba rekudzvanya rinodiwa kuti compact iwane 80% hama density /MPa |
| Pb | 3.98 | 35 | 245 | 618 |
| Sn | 3.50 | 50 | 515 | 1029 |
| With | 3.51 | 49 | 2205 | 3724 |
| Fe | 2.70 | 70 | 2009 | 4900 |
Mhedzisiro yehupfu kuchena
Pamusana pemaitiro akasiyana-siyana ekugadzira hupfu, kuchena kwehupfu hakuna kufanana, uye hupfu hune humwe husina kuchena. Izvo zvisina kuchena muhupfu zvakanyanya muchimiro chesimbi oxides.
Iyo metal oxide poda yakanyanya kuoma uye brittle, uye inonyanya kugoverwa pamusoro pehupfu hwesimbi, iyo inowedzera kudzvanya kuramba uye kushatisa kuita kwekudzvanya.
The manufacturability yehupfu inogadzira zvikamu chimiro
1. Kuita kuti kugadzira mold uye compaction zvive nyore, edza kusarudza yakananga, symmetrical dhizaini inodzivirira kusiyanisa kwakanyanya muchikamu uye nhete grooving, spherical surfaces, nezvimwewo.
2. Dzivisa madziro akatetepa emunharaunda kuti aite kuti upfu huputike uye kudzivirira kutsemuka.
3. Dzivisa grooves uye maburi mumadziro emativi kuti afambise kupindirana kana kuderedza zvidhinha zvakasara.
4. Dzivisa kuwedzera mhiri-sectional nzvimbo pamwe nekudzvanya kutungamira kuti ufambise compaction. Makona anofanirwa kutenderedzwa panosangana madziro ega ega kuti afambise kugadzikana uye kudzivirira kushushikana.
Powder Kugadzira Chikamu
Rudzi rwekutanga rwezvikamu: unidirectional kudzvanya, madziro akatetepa, chimiro chinopokana, chikamu chetafura (ukobvu hwemadziro kazhinji hunosvika 6.35mm)
Rudzi rwechipiri rwechikamu: chikamu chetafura, chero kureba uye chimiro, chinofanira kunge chiri bidirectional kudzvanya zvikamu.
Chikamu chechitatu: Chikamu chematafura maviri, ehupi hurefu uye chimiro, chinofanira kudzvanywa mumativi ese
Rudzi rwechina rwezvikamu: tafura yakawanda, chero kureba uye chimiro, inofanirwa kushandisa akawanda-anofa stamping bidirectional kudzvanya zvikamu.
Nguva yekutumira: Sep-28-2023