Yam dab tsi cuam tshuam rau qhov zoo ntawm qhov nruab nrab - zaus yeeb nkab dabtsi yog khoov tshuab?

Spherical hlau hmoov yog cov khoom siv tseem ceeb tshaj plaws rau cov hlau 3D luam ntawv thiab qhov txuas tseem ceeb hauv 3D luam ntawv kev lag luam saw, ze ze rau kev txhim kho 3D tshuab luam ntawv. Tam sim no, hlau hmoov cov ntaub ntawv rau 3D luam ntawv feem ntau yog tsom rau titanium alloys, siab -kub alloys, cobalt-chromium alloys, siab - lub zog steel, thiab pwm hlau. Yog li ntawd, kev tshawb fawb txog kev npaj 3D luam ntawv hlau hmoov yog qhov tseem ceeb tshwj xeeb. Cov hauv qab no yog plaub txoj hauv kev los npaj cov hmoov hlau rau 3D luam ntawv, suav nrog lub tshuab nqus tsev atomization hmoov npaj khoom tsim rau koj siv.

1. Gas Atomization Technology

Gas atomization hmoov npaj tshuab yog tam sim no feem ntau txoj kev npaj cov hmoov spherical. Keeb kwm nyob rau xyoo 1920, nws koom nrog kev siv lub siab - ceev inert gas kom ncaj qha mus ua txhaum thiab txias molten hlau los yog alloy kua kom tau cov hmoov. Lub siab - cua nrawm tuaj rau hauv kev sib cuag nrog cov hlau molten; Cov txheej txheem no suav nrog ob qho tib si hloov pauv thiab hloov pauv kub. Cov cua ntws muab lub zog rau kev rhuav tshem cov kua thiab ua raws li qhov nruab nrab cua txias. Cov kua dej tas mus li raug cuam tshuam los ntawm cov roj ntws, thiab nyob rau hauv kev nyuaj siab shear, nws disperses thiab tawg mus rau hauv cov tee ntawm ntau qhov sib txawv.

Cov txheej txheem yog raws li hauv qab no: Ua ntej, tus tswv alloy yog muab tso rau hauv lub tshuab nqus tsev induction rauv thiab melted mus rau lub xeev molten. Lub molten alloy ntws mus rau hauv lub atomizing nozzle thiab tawg mus rau hauv me me tee dej los ntawm ib tug siab - airflow. Cov tee dej no txias sai sai thiab khov rau hauv cov hmoov nplej thaum lawv ya mus rau hauv lub atomization chamber, thiab thaum kawg tau sau los ntawm cov hmoov sib sau ua ke. Cov roj atomization tshuab siv nws txawv nyob ntawm txoj kev melting.

2. Plasma Rotating Electrode Atomization Method

Cov thev naus laus zis no cuam tshuam rau qhov kawg ntawm qhov siab -rotating pas nrig, ua rau cov tee hlau ya tawm nyob rau hauv lub zog centrifugal thiab txias rau hauv lub xeev ntawm inert nruab nrab los npaj spherical hlau hmoov. Txoj kev npaj hmoov no yog thawj zaug ua tiav los ntawm American Metals Corporation. Raws li kev ua ntawm rab phom plasma, lub siab - lub zog, ultra- siab - ceev electrode pas nrig yog yaj, tsim kom muaj qhov kub thiab txias ntawm kwv yees li 20,000℃ntawm ib kawg ntawm cov hlau electrode pas nrig los ua ib txheej hlau molten 10-20µm tuab. Nyob rau hauv cov xwm txheej ntawm ultra{11}} siab- kev sib hloov ceev ntawm cov pas nrig electrode, lub zog centrifugal ntawm cov tee hlau maj mam kov yeej cov viscosity ntawm molten hlau txheej, tsim cov tee me me nyob rau hauv lub radial kev taw qhia ntawm alloy pas nrig, uas yog hu ua "crowns". Raws li "crown" accumulates, nws tsim ib qho "qhov hluav taws xob," thaum kawg tshem tawm ntawm cov pas nrig alloy li ze li ntawm cov hlau kheej kheej hmoov los ntawm lub caij nplooj zeeg dawb thiab txias nrog cryogenic helium nyob rau hauv qhov loj-loj atomization chamber.

Cov txheej txheem muaj xws li: plasma rotating electrode hmoov npaj ---- sieving (hmoov yog cais raws li particle loj nyob rau hauv lub tshuab nqus tsev los yog inert gas tiv thaiv) ---- ntim.

3. Plasma Filament Atomization Method

Plasma filament atomization thev naus laus zis yog cov txheej txheem rau kev npaj cov hmoov txhuam hniav uas siv cov plasma cua sov qhov chaw, tsim los ntawm Canadian lub tuam txhab hauv xyoo 1995. Lub hauv paus ntsiab lus ntawm plasma atomization tshuab yog qhia cov hlau thiab lawv cov alloys, cov ntaub ntawv ceramic, los yog lwm yam ntaub ntawv rau hauv nruab nrab ntawm ib tug converging plasma dav hlau nyob rau hauv daim ntawv ntawm filaments, kwj, kwj. Nyob rau hauv qhov cuam tshuam ntawm lub dav hlau supersonic plasma, atomization tshwm sim, ua raws li qhov txias thiab solidification los ua cov hmoov kheej kheej. Nrog rau txoj kev loj hlob ntawm plasma rab phom tshuab, cov plasma dav hlau tau ua tiav qhov siab dua, txo qhov nruab nrab ntawm cov hmoov atomized los ntawm thawj 100-300 μm mus rau 30-60 μm, ua rau nws haum rau laser thiab electron beam additive manufacturing txheej txheem.

Cov txheej txheem yog raws li nram no: Ua ntej, lub filament yog straightened thiab pub rau hauv nruab nrab ntawm peb converging plasma dav hlau. Nyob rau hauv lub siab enthalpy cua sov tej yam kev mob ntawm lub plasma dav hlau, qhov kawg ntawm cov filament yaj. Cov kua molten yog atomized los ntawm kev cuam tshuam ntawm kev sib koom ua ke supersonic plasma dav hlau, thiab cov tee tawg spheroidize nyob rau hauv qhov kev txiav txim ntawm qhov nro. Tom qab tawm hauv lub dav hlau plasma, lawv txias thiab solidify los ua cov hmoov zoo heev. Peb yam tsis yog -hloov arc plasma phom yog sib npaug ntawm 30℃mus rau txoj kab ntsug, thaum kawg tsim cov hmoov.

4. Xov tooj cua Frequency Plasma Spheroidization Method

Xov tooj cua zaus plasma spheroidization tshuab siv lub siab -kub yam ntxwv ntawm lub xov tooj cua zaus plasma kom kub ceev thiab yaj irregularly zoo li tus hmoov particles nkag mus rau hauv cov ntshav. Cov molten particles sai sai solidify nyob rau hauv kev sib xyaw ua ke ntawm nto nro thiab tsis tshua muaj kub kub gradients los ua spherical hmoov. Spherical hmoov muaj qhov zoo xws li purity siab, tsis sib xws particle loj tis, zoo flowability, thiab tsawg hollow hais.