Yuav Siv Tungsten Carbide Composite Qws li cas

1. Khaws qhov chaw kom huv si

Cov khoom siv uas yuav tsum tau siv cov carbide composite pas nrig yuav tsum tau ntxuav kom huv si thiab tsis muaj corrosion thiab lwm yam txawv teb chaws. Sandblasting yog txoj kev nyiam; kev sib tsoo, xaim txhuam, lossis xuab zeb kuj yog qhov txaus siab. Sandblasting ntawm qhov chaw yuav ua rau muaj teeb meem hauv tinning matrix.

2. Qhov kub ntawm vuam

Xyuas kom tseeb tias lub cuab yeej yog positioned rau down-hand brazing. Thaum ua tau, ruaj ntseg lub cuab tam nyob rau hauv ib tug haum jig fixture.

Sim ua kom lub taub hau ntawm koj lub teeb ob mus rau peb ntiv tes tawm ntawm qhov chaw koj hnav khaub ncaws. Maj mam preheat rau li ntawm 600 ° F (315 ° C) mus rau 800 ° F (427 ° C), tswj qhov kub ntawm qhov tsawg kawg nkaus ntawm 600 ° F (315 ° C).

3. Tsib kauj ruam ntawm vuam

(1)Thaum qhov kub thiab txias yog mus txog, sprinkle saum npoo yuav tsum tau hnav nrog brazing flux hmoov. Koj yuav pom cov npuas flux thiab boil yog tias qhov chaw ntawm koj lub workpiece yog txaus rhuab. Qhov flux no yuav pab tiv thaiv kev tsim cov oxides hauv molten matrix thaum hnav khaub ncaws. Siv lub teeb oxy-acetylene. Cov tswv yim xaiv yuav nyob ntawm qhov xwm txheej- # 8 lossis # 9 rau kev hnav khaub ncaws loj, # 5, # 6 lossis # 7 rau thaj chaw me lossis cov fab nruj. Kho kom haum rau qhov hluav taws kub qis nruab nrab nrog koj cov ntsuas ntsuas ntawm 15 ntawm acetylene thiab 30 ntawm oxygen.

(2)Txuas ntxiv kom sov rau saum npoo kom hnav khaub ncaws kom txog thaum lub carbide composite rod xaus liab thiab koj lub brazing flux yog kua thiab ntshiab.

(3)Nyob ntawm 50 hli mus rau 75 hli ntawm qhov chaw, tso cov cua sov hauv ib cheeb tsam mus rau lub paj liab liab, 1600 ° F (871 ° C). Nqa koj tus pas nrig brazing thiab pib tinning saum npoo nrog li 1/32 "mus rau 1/16" tuab npog. Yog hais tias qhov saum npoo yog rhuab kom zoo, lub pas nrig muab tub lim yuav ntws thiab kis mus ua raws li cov cua sov. Cov cua kub tsis zoo yuav ua rau cov hlau molten hlaws. Txuas ntxiv kom sov thiab tom qab ntawd tin saum npoo yuav tsum hnav kom nrawm raws li cov molten muab tub lim matrix yuav sib cog lus.

(4) Nqa koj cov tungsten carbide composite pas nrig thiab pib yaj tawm ntawm 1/2 "mus rau 1" seem. Qhov no tuaj yeem ua kom yooj yim dua los ntawm dipping qhov kawg mus rau hauv ib qho qhib tau ntawm flux.

(5)Tom qab thaj chaw tau them los ntawm cov pas nrig sib xyaw, siv cov tinning matrix los npaj cov carbides nrog cov ntug ntse tshaj plaws. Siv lub voj voog ncig nrog lub teeb taws kom tsis txhob overheat qhov chaw hnav khaub ncaws. Khaws qhov concentration ntawm carbide nyob rau hauv lub hnav khaub ncaws kom ntom li sai tau.

4. Ceev faj rau welder

Xyuas kom qhov chaw ua haujlwm tau zoo ventilated. Gas thiab fumes generated los ntawm flux los yog matrix yog tshuaj lom thiab tej zaum yuav ua rau xeev siab los yog lwm yam mob. Tus kws vuam yuav tsum hnav # 5 lossis # 7 lub lens tsaus, tsom iav, pob ntseg, lub tes tsho ntev, thiab hnab looj tes txhua lub sijhawm thaum thov.

5. Ceev faj

Tsis txhob siv ntau ntau ntawm filler matrix pas nrig - nws yuav dilute cov carbide matrix feem pua.

Tsis txhob overheat cov carbide. Lub teeb ntsuab qhia tias kub dhau ntawm koj cov carbides.

Txhua lub sij hawm koj cov khoom carbide tsis kam ua tin, lawv yuav tsum tau flipped tawm ntawm lub pas dej los yog tshem tawm nrog ib tug brazing pas nrig.

A. Thaum koj daim ntawv thov xav kom koj tsim cov ntaub qhwv ntau dua 1/2 ", qhov no yuav xav tau cov hlau me me 1020-1045 zoo li lub ncoo rau welded rau koj lub cuab yeej hauv qhov chaw hnav.

B. Tom qab koj cheeb tsam hnav khaub ncaws, txias lub cuab yeej maj mam. Tsis txhob txias nrog dej. Tsis txhob rov ua kom sov qhov chaw hnav khaub ncaws los ntawm kev ua ib qho kev vuam nyob ze nws.

6. Yuav ua li cas tshem tawm carbide composite qws

Txhawm rau tshem tawm koj qhov chaw hnav khaub ncaws tom qab nws tau dulled, ua kom sov thaj chaw carbide rau xim liab npub thiab siv cov txhuam hniav hlau kom tshem tawm cov carbide grits thiab matrix ntawm qhov chaw. Tsis txhob sim txav deb ntawm carbide grits thiab matrix nrog koj lub teeb ib leeg.