Ob peb lub ntsiab lus tseem ceeb hauv Metallographic Microscopy Kev Tshuaj Xyuas Cov Khoom Hlau
Lub ntsiab tseem ceeb uas yuav tsum tau kuaj xyuas metallographic (metallographic microscope) rau cov ntaub ntawv hlau yog raws li hauv qab no:
1. Yav dhau los, hauv kev tsim khoom, kev saib xyuas, kev kho cua sov thiab lwm yam txheej txheem ntawm cov hlau thiab cov khoom siv, kev hloov pauv ntawm cov ntaub ntawv hlau feem ntau tshwm sim los ntawm cov txheej txheem tsis raug lossis cov khoom siv kho cua sov, ua rau cov khoom tsis ua raws li cov qauv zoo. Yog tias kev tshuaj xyuas metallographic siv los qhia kev tsim khoom thiab saib xyuas cov khoom zoo, xws li kev tsis xws luag tuaj yeem zam tau.
2. Tom qab qee lub sijhawm siv lossis nyob rau hauv kev hloov pauv thiab kub hloov pauv, cov khoom siv hlau thiab cov castings loj thiab forgings yuav maj mam deteriorate, thiab cov microstructure ntawm cov khoom yuav raug hloov pauv ntau yam. Thaum qhov kev hloov pauv no nce mus txog qee qhov kev txwv, nws yuav ua rau muaj xwm txheej xws li xau, deformation, lossis tam sim ntawd tawg ntawm cov khoom, cuam tshuam rau * * ntau lawm. Lub sijhawm no, kev tshuaj xyuas metallographic tsis tu ncua tuaj yeem ua tiav, Tshawb xyuas thiab saib xyuas cov kev hloov pauv ntawm cov ntaub ntawv, ua raws sijhawm thiab tsim nyog ntsuas kom tsis txhob muaj xwm txheej.
3. Kev tshuaj xyuas metallographic yog ib txoj haujlwm tseem ceeb hauv kev ua tsis tiav ntawm cov khoom siv hlau, suav nrog kev tshuaj xyuas macroscopic thiab microscopic, uas feem ntau suav nrog cov hauv qab no:
(1) Tsawg magnification acid etching xeem. Txheeb xyuas qhov sib cais sab hauv, xoob, sib xyaw, porosity thiab lwm yam tsis xws luag ntawm cov khoom; Kev puas tsuaj xws li nto folding, xuab zeb suav nrog, thiab nti; Cov kab nrib pleb sab hauv, dawb me ntsis, overburning, thiab lwm yam; Forging streamline, vuam zoo, sib tsoo, thiab lwm yam.
(2) Siv cov txheej txheem luam ntawv sulfur thiab phosphorus los tshuaj xyuas kev sib cais ntawm cov sulfur thiab phosphorus hauv cov hlau.
(3) Kev tsom xam pom tseeb ntawm lub koom haum yog siv los txiav txim seb qhov kev kho cua sov lossis kev ua haujlwm txias ntawm cov khoom ua tsis tau zoo yog qhov qub.
(4) Txheeb xyuas qhov corrosion, hnav, oxidation, thiab nto ua haujlwm hardening ntawm cov khoom ua tsis tau raws li kev ua haujlwm.
(5) Txheeb xyuas qhov xwm txheej ntawm qhov tawg raws li cov yam ntxwv ntawm qhov tawg ntawm qhov ua tsis tiav thiab microstructure ntawm ob sab ntawm qhov tawg.
(6) Txiav txim siab seb cov khoom puas tsim nyog los ntawm kev txheeb xyuas cov khoom tsis yog xim hlau nyob rau hauv cov khoom ua tsis tiav.
