Welding Technology ntawm PDC

PDC cutters feature siab hardness, siab hnav tsis kam ntawm pob zeb diamond, thiab zoo cuam tshuam toughness ntawm cemented carbide. Nws tau dav siv hauv geological drilling, roj thiab roj drilling, thiab cov cuab yeej txiav. Qhov kub tsis ua haujlwm ntawm polycrystalline pob zeb diamond txheej yog 700 ° C, yog li qhov kub ntawm cov pob zeb diamond txheej yuav tsum tau tswj qis dua 700 ° C thaum lub sij hawm vuam txheej txheem. Cov txheej txheem cua sov ua lub luag haujlwm txiav txim siab hauv PDC txheej txheem brazing. Raws li cov txheej txheem cua sov, txoj kev brazing tuaj yeem muab faib ua cov nplaim hluav taws xob, lub tshuab nqus tsev, lub tshuab nqus tsev vacuum, kev sib txuas siab induction brazing, laser beam vuam, thiab lwm yam.

PDC nplaim taws brazing

Nplaim brazing yog ib txoj kev vuam uas siv cov nplaim hluav taws uas tsim los ntawm cov roj combustion rau cua sov. Ua ntej, siv cov nplaim taws kom sov lub cev steel, ces txav cov nplaim mus rau PDC thaum cov flux pib yaj. Cov txheej txheem tseem ceeb ntawm nplaim brazing muaj xws li kev kho mob ua ntej vuam, cua sov, kev txuag hluav taws xob, cua txias, kev kho tom qab vuam, thiab lwm yam.

PDC nqus tsev vacuum

Nqus brazing yog ib txoj kev vuam uas ua kom sov cov khoom ua haujlwm hauv lub tshuab nqus tsev hauv qhov chaw tsis muaj oxidizing roj. Lub tshuab nqus tsev brazing yog siv cov cua kub ntawm qhov chaw ua haujlwm ua lub tshav kub ntawm lub sijhawm no hauv zos txias rau polycrystalline pob zeb diamond txheej los siv cov kub kub brazing. Siv cov dej txias tas li thaum lub sij hawm brazing txheej txheem los xyuas kom meej tias qhov kub ntawm lub pob zeb diamond txheej yog tswj hauv qab 700 ° C; Lub tshuab nqus tsev nyob hauv lub xeev txias ntawm brazing yuav tsum qis dua 6. 65 × 10-3 Pa, thiab lub tshuab nqus tsev nyob hauv lub xeev kub yog qis dua 1. 33 × 10-2 Pa. Tom qab vuam, muab cov khoom ua haujlwm. mus rau hauv lub incubator rau kev txuag tshav kub kom tshem tawm cov thermal stress generated thaum lub sij hawm brazing txheej txheem. Lub zog shear ntawm lub tshuab nqus tsev sib txuas yog qhov ruaj khov, lub zog sib koom ua ke siab, thiab qhov nruab nrab shear zog tuaj yeem ncav cuag 451.9 MPa.

PDC nqus tsev vacuum diffusion bonding

Vacuum diffusion bonding yog ua kom cov chaw ua haujlwm huv hauv lub tshuab nqus tsev nyob ze rau ib leeg ntawm qhov kub thiab txias siab, atoms diffuse rau ib leeg nyob rau hauv qhov deb me me, yog li koom nrog ob feem ua ke.

Qhov tseem ceeb tshaj plaws feature ntawm diffusion bonding:

1. cov kua alloy tsim nyob rau hauv lub brazing seam thaum lub sij hawm brazing cua sov txheej txheem

2. cov kua alloy yog khaws cia rau ib lub sij hawm ntev ntawm qhov kub siab tshaj qhov kub ntawm lub solidus kub ntawm lub brazing muab tub lim kom nws yog isothermally solidified los ua ib tug brazing seam.

Txoj kev no muaj txiaj ntsig zoo rau PDC cov cemented carbide substrate thiab pob zeb diamond, uas muaj cov coefficients sib txawv heev. Lub tshuab nqus tsev vacuum diffusion bonding txheej txheem tuaj yeem kov yeej qhov teeb meem uas PDC yooj yim poob tawm vim qhov poob qis hauv lub zog ntawm brazing muab tub lim hlau. (thaum lub sijhawm drilling, qhov kub thiab txias tau nce, thiab lub zog ntawm cov hlau brazing yuav poob qis.)

Yog tias koj txaus siab rau PDC cutters thiab xav tau cov ntaub ntawv thiab cov ntsiab lus ntxiv, koj tuaj yeem tiv tauj peb hauv xov tooj lossis xa ntawv ntawm sab laug, lossis xa US MAIL rau hauv qab ntawm nplooj ntawv.