Kev tshuaj xyuas tag nrho ntawm cov khoom, cov yam ntxwv, thiab kev siv cov khoom siv cuab yeej superhard

Kev tshuaj xyuas tag nrho ntawm cov khoom, cov yam ntxwv, thiab kev siv cov khoom siv cuab yeej superhard

Hauv kev lag luam ntawm precision manufacturing thiab siab -machining ceev, superhard cov ntaub ntawv tau dhau los ua "riam phom" ntawm precision machining vim lawv cov kev ua tau zoo heev. Kab lus no yuav pib nrog ob lub ntsiab lus superhard - pob zeb diamond thiab cubic boron nitride (CBN), coj koj los ntawm lub zog tseem ceeb ntawm "cov hniav kev lag luam" los ntawm lawv hom, cov khoom, thiab daim ntawv thov scenarios!

Ⅰ. Pob zeb diamond txiav cov cuab yeej: "tus huab tais ntawm hardness" nyob rau hauv xwm

Pob zeb diamond yog ib qho isomer ntawm cov pa roj carbon nrog microhardness ntawm 10000HV, ua rau nws cov khoom nyuaj tshaj plaws paub hauv cov xwm txheej. Nws cov cuab yeej txiav tau paub txog lawv qhov hardness siab, hnav tsis kam, tsis tshua muaj kev sib txhuam coefficient, thiab thermal conductivity zoo heev, ua rau lawv yog "qhov kawg riam phom" rau kev ua cov khoom tsis yog-ferrous hlau thiab tsis yog-cov ntaub ntawv hlau.

 

1. Peb lub ntsiab hom pob zeb diamond txiav cov cuab yeej
(1) Ntuj pob zeb diamond txiav cov cuab yeej

• "precision machining huab tais" nrog rau ib puas xyoo keeb kwm, nrog ib tug txiav ntug vojvoog txog li 0.002 μ m, muaj peev xwm ua tau ultra- nyias txiav thiab tsis tshua muaj nto roughness, ua rau nws ib tug irreplaceable cuab tam nyob rau hauv teb xws li aerospace thiab optics.

 

(2) PCD (Polycrystalline Pob Zeb Diamond) cov cuab yeej txiav

• Tom qab qhov kev ua tiav ntawm siab - kub thiab siab - cov tshuab hluav taws xob sib xyaw ua ke hauv xyoo 1970, PCD cov hniav tau dhau los ua qhov tseem ceeb ntawm kev lag luam nrog tus nqi qis thiab siab hnav tsis kam. Nws cov khoom siv raw khoom muaj ntau, thiab nws tus nqi tsuas yog 1/10 txog 1/50 ntawm ntuj pob zeb diamond. Nws yog dav siv nyob rau hauv precision txiav ntawm non{9}}ferrous hlau xws li txhuas thiab tooj liab.

 

(3) CVD pob zeb diamond txiav cov cuab yeej

• Synthesized los ntawm tshuaj vapor deposition ntawm heterogeneous substrates, cov qauv yog raws li tej yam ntuj tso pob zeb diamond thiab combines qhov zoo ntawm ib tug siv lead ua thiab polycrystalline. Nws tau tshwm sim nyob rau hauv teb xws li ntoo ua thiab semiconductors.

 

2. Cov yam ntxwv ua haujlwm: nyuaj, ceev, ruaj khov, raug
(1) Hardness thiab hnav tsis kam:

• Ntuj pob zeb diamond hardness yog 10-100 npaug ntawm cov hlau alloys nyuaj, txhim kho lub neej zoo.

 

(2) Tsawg txhuam coefficient:

• Tsis tshua muaj kev sib txhuam coefficient nrog cov hlau tsis muaj -ferrous, tsawg txiav quab yuam, thiab deformation tsawg heev.

(3) Ultra ntse txiav ntug:

• Lub ntuj pob zeb diamond txiav ntug vojvoog tuaj yeem ncav cuag 0.002m, txhawb nqa ultra precision machining.

(4) High thermal conductivity:

• txiav cov cua kub sai sai dissipates, lub cuab yeej kub yog tsawg, thermal expansion coefficient yog me me, thiab qhov ntev stability yog zoo heev.

 

3. Daim ntawv thov scenarios:
(1) Kev kub ceev precision txiav:

• hnav- cov ntaub ntawv tiv taus xws li silicon aluminium alloy, fiberglass, ceramics, thiab lwm yam.

(2) Cov txheej txheem tiav:

• Polishing saum npoo ntawm cov hlau tsis yog -ferrous.

(3) Kev txwv:

• Tsis zoo thermal stability. Hardness poob sharply thaum txiav kub tshaj 700-800 degree. Tsis haum rau kev sib cuam tshuam ntawm pob zeb diamond (carbon) thiab hlau atoms ntawm qhov kub thiab txias hauv cov hlau dub, vim tias carbon atoms yuav hloov mus rau hauv cov qauv graphite thiab cov cuab yeej txiav yog qhov ua rau puas tsuaj.

 

Ⅱ. Cubic Boron Nitride (CBN): 'High Kub Tsov Rog' ntawm Dub Hlau

1. Ob lub ntsiab ntawm cubic boron nitride tej cuab yeej
(1) Integrated PCBN hniav

Tag nrho lub cev yog sintered los ntawm polycrystalline CBN, haum rau siab -machining ceev nrog loj txiav nqi, xws li nyuaj tig ntawm automotive zog tom qab quenching.

 

(2) PCBN cov hniav sib xyaw
Composite ntawm 0.5-1.0mm tuab PCBN txheej ntawm hard alloy substrate, ntsuas toughness thiab hnav tsis kam, dav siv nyob rau hauv precision machining ntawm bearing steel thiab pwm hlau.

 

 

2. Cov yam ntxwv ua tau zoo:
(1) Siab hardness thiab hnav tsis kam: Lub hardness yog ze rau pob zeb diamond, haum rau kev ua cov ntaub ntawv siab hardness (xws li quenched steel).

 

(2) Ultra siab thermal stability: Lub tshav kub tsis kam mus txog 1400 ~ 1500 degree, uas yog ob zaug ntawm pob zeb diamond thiab txhawb siab - txiav ceev.

 

(3) Chemical inertness: Tsis muaj tshuaj tiv thaiv nrog hlau -cov ntaub ntawv raws li 1200-1300 degree, zam kev hnav hnyav.

 

(4) Zoo thermal conductivity: Lub thermal conductivity yog thib ob tsuas yog pob zeb diamond, deb tshaj nws Ceev steel thiab nyuaj alloy.

 

(5) Tsis tshua muaj kev sib txhuam coefficient: tsawg txiav quab yuam, zoo nto zoo.

 

 

3. Daim ntawv thov scenario: Qhov "nemesis" ntawm quenched steel thiab hard cam khwb cia hlau
(1) Kev ua cov khoom siv txiav nyuaj:

quenched steel, nyuaj cam khwb cia hlau, siab -kub alloys, nto txau cov ntaub ntawv

 

(2) High precision machining:

High precision, nrog ib tug nto roughness tsawg li Ra0.20m.

 

(3) Kev txwv:

Tsis zoo toughness, tsis haum rau ntxhib machining ntawm tsawg speeds thiab siab loads. Kev txiav cov ntaub ntawv yas xws li txhuas alloys, tooj liab alloys, thiab lwm yam yog ua rau nti tsub zuj zuj.

 

Ⅲ. Xaiv Phau Ntawv Qhia rau Superhard Cutting Tools

1. Pob zeb diamond txiav cov cuab yeej:

Qhov tseem ceeb yog muab rau siab - precision machining ntawm non- ferrous hlau thiab cov hlau tsis muaj hlau, thiab yuav tsum tau tswj xyuas qhov kub thiab txias.

 

2. Cubic boron nitride tej cuab yeej:

tshwj xeeb hauv kev siab - ceev machining ntawm cov hlau dub thiab cov ntaub ntawv nyuaj, tshwj xeeb tshaj yog tsim rau quenched steel thiab cam khwb cia hlau.

 

Ⅳ. Xaus

 

Los ntawm "qhov kawg precision" ntawm pob zeb diamond mus rau "siab-kub tsis txaus ntshai" ntawm PCBN, cov khoom siv superhard tau dhau mus tas li los ntawm kev txwv. Txawm nyob rau hauv lub teb ntawm aerospace, automotive manufacturing, los yog hluav taws xob chips, lawv yog tag nrho cov tseem ceeb zog tsav kev lag luam kev vam meej. Nyob rau hauv lub neej yav tom ntej, nrog rau kev nce qib ntawm cov ntaub ntawv science, superhard tej cuab yeej yuav muaj tseeb account ntau possibilities!

 

Cov ntaub ntawv superhard yog dav siv. Cov cuab yeej pob zeb diamond thiab CBN cov cuab yeej tsim los ntawm peb lub tuam txhab yog ib feem me me ntawm tag nrho cov cuab yeej superhard.