I. Isi ihe mejupụtara
1. Usoro siri ike: Tungsten Carbide (WC)
- Oke oke: 70-95%
- Njirimara igodo: Na-egosipụta ike siri ike dị elu ma na-eyi nguzogide, yana ike Vickers ≥1400 HV.
- Mmetụta nke nha ọka:
- Mkpụrụ ọka (3-8μm): Akwa siri ike na nguzogide mmetụta, adabara maka nhazi nke nwere gravel ma ọ bụ ihe mgbagwoju anya.
- Ọka mara mma/Ultrafine (0.2-2μm): Enwetara ike ike na iyi nguzogide, dị mma maka ụdị abrasive dị ka quartz sandstone.
2. Usoro nchikota: Cobalt (Co) ma ọ bụ Nickel (Ni)
- Oke oke: 5-30%, na-eme dị ka "ọla nrapado" na-ejikọta tungsten carbide particles ma na-enye ike.
- Ụdị na njirimara:
- Dabere na Cobalt (Nhọrọ Isi iyi):
- Uru: Ike dị elu na okpomọkụ dị elu, ezigbo ikuku okpomọkụ, yana ihe ndị na-arụ ọrụ zuru oke.
- Ngwa: Ọtụtụ ihe a na-emekarị na nke dị elu (cobalt na-adịgide n'okpuru 400 ° C).
- Dabere na nickel (Ihe achọrọ pụrụ iche):
- Uru: Nguzogide corrosion siri ike (na-eguzogide H₂S, CO₂, na mmiri mmiri na-egwu mmiri dị elu).
- Ngwa: Oghere gas acid, ikpo okwu dị n'ụsọ osimiri, na gburugburu ndị ọzọ na-emebi emebi.
- Dabere na Cobalt (Nhọrọ Isi iyi):
3. Ihe mgbakwunye (Mmepụta ọkwa Micro-Micro-Level)
- Chromium Carbide (Cr₃C₂): Na-eme ka nguzogide oxidation na-ebelata ma na-ebelata nkwụsị nke njedebe nke n'okpuru ọnọdụ okpomọkụ dị elu.
- Tantalum Carbide (TaC)/Niobium Carbide (NbC): Na-egbochi uto ọka ma na-eme ka ike dị elu na-ekpo ọkụ.
II. Ihe kpatara ịhọrọ Tungsten Carbide Hardmetal
| Arụmọrụ | Nkọwa uru |
|---|---|
| Yiri Nguzogide | Isi ike nke abụọ bụ naanị diamond, na-eguzogide mbuze site na irighiri ihe na-egbu egbu dị ka ájá quartz (ọnụego iyi uwe 10+ dị ala karịa ígwè). |
| Nguzogide mmetụta | Isi ike sitere na akụkụ cobalt/nickel binder na-egbochi nkewa site na ịma jijiji na-agbadata na ntakịrị bouncing (karịsịa oke ọka + nnukwu cobalt usoro). |
| Nkwụsi ike dị elu | Na-arụ ọrụ na okpomọkụ nke oghere ala nke 300-500 ° C (alumines dabeere na cobalt nwere oke okpomọkụ nke ~500°C). |
| Nguzogide corrosion | Alloys dabeere na nickel na-eguzogide corrosion sitere na mmiri mmiri ndị nwere sọlfọ nwere sọlfọ, na-agbatị ndụ ọrụ na gburugburu acid. |
| Ọnụ-arụmọrụ | Ọnụ ego dị ala karịa diamond/cubic boron nitride, yana ndụ ọrụ 20-50 ugboro nke igwe nozzles, na-enye uru zuru oke. |
III. Tụnyere ihe ndị ọzọ
| Ụdị ihe | Ọdịmma | Ihe ngosi ngwa |
|---|---|---|
| diamond (PCD/PDC) | Akwa brittleness, mmegide mmetụta na-adịghị mma; dị oke ọnụ (~ 100x nke tungsten carbide). | Ọ na-adịkarịghị eji nozzles; mgbe ụfọdụ na gburugburu nnwale abrasive. |
| Cubic boron nitride (PCBN) | Ezigbo nguzogide okpomọkụ mana obere ike; ọnụ. | Nhazi siri ike dị elu dị elu dị elu (nke na-abụghị isi). |
| Ceramics (Al₂O₃/Si₃N₄) | Isi ike dị elu mana mgbaji dị ịrịba ama; adịghị mma thermal ujo eguzogide. | N'ọkwa nkwado ụlọ nyocha, emebebeghị ka azụmaahịa. |
| Igwe dị ike dị elu | Nguzogide iyi na-adịghị mma, ndụ ọrụ dị mkpirikpi. | Mpekere dị ala ma ọ bụ ndị ọzọ nwa oge. |
IV. Ntuziaka Evolushọn nka nka
1. Nhazi ihe kacha mma
- Nanocrystalline Tungsten Carbide: nha ọka <200nm, isi ike mụbara site na 20% na-emebighị ike (dịka ọmụmaatụ, usoro Sandvik Hyperion™).
- Nrụmọrụ enwetara nke ọma: WC dị mma nke siri ike dị elu n'elu nozzle, nnukwu ọka siri ike + nnukwu cobalt, na-edozi iyi na nguzogide mgbaji.
2. Elu ike
- mkpuchi diamond (CVD)Ihe nkiri 2-5μm na-abawanye ike elu ruo> 6000 HV, na-agbatị ndụ site na 3-5x (30% na-abawanye ọnụ ahịa).
- Ihe mkpuchi laser: WC-Co n'ígwé edobere na nozzle ebe adịghị ike iji welie mgbochi eyi uwe mpaghara.
3. Mgbakwunye Mmepụta
- Tungsten Carbide 3D ebipụtara: Na-enyere aka ịmepụta ọwa dị mgbagwoju anya (dịka ọmụmaatụ, akụkụ Venturi) iji melite arụmọrụ hydraulic.
V. Isi ihe maka ịhọrọ ihe
| Ọnọdụ ọrụ | Nkwanye ihe onwunwe |
|---|---|
| Ụdị abrasive dị ukwuu | Ọmarịcha/ultrafine-ọka WC + cobalt dị obere (6–8%) |
| Akụkụ mmetụta/ma jijiji-enwere ike | WC na-esighi ike-ọka + cobalt dị elu (10-13%) ma ọ bụ nhazi ọkwa |
| Acid (H₂S/CO₂) gburugburu | Ihe mgbakwunye nickel + Cr₃C₂ mgbakwunye |
| Olulu mmiri dị omimi (>150°C) | Ihe mgbakwunye nke Cobalt + TaC/NbC (zere na nickel maka ike okpomọkụ adịghị ike) |
| Ọrụ ndị na-erite uru | Ọkọlọtọ ọkara-ọka WC + 9% cobalt |
Mmechi
- Ọchịchị ahịa: Tungsten carbide hardmetal (WC-Co/WC-Ni) bụ ihe zuru oke, na-aza maka> 95% nke ahịa egwu egwu egwu zuru ụwa ọnụ.
- Core Performance: Nkwekọrịta na ihe ịma aka nhazi dị iche iche site na mmezi na nha ọka WC, cobalt/nickel ratio, na ihe mgbakwunye.
- Enweghị ngbanwe: Na-anọgide na-abụ ihe ngwọta kachasị mma maka ịhazi nkwụsi ike na-eyi, ike siri ike, na ọnụ ahịa, na teknụzụ ndị na-egbuke egbuke (nanocrystalization, coatings) na-agbasawanye ókèala ngwa ya.
Oge nzipu: Jun-03-2025
