Qhov tseem ceeb tshaj plaws ntawm kev txhim kho fastener thiab tsim qauv yog kev tswj kom zoo. Los ntawm cov khoom xa tuaj mus rau cov khoom xa tuaj tiav, muaj ntau qhov chaw kuaj xyuas qhov tseem ceeb, txhua tus muaj ntau txoj kev tshuaj xyuas.
Ua ntej, cov khoom tuaj koom nrog kev tshuaj xyuas ntawm qhov pom, qhov ntev, qhov muaj pes tsawg leeg, kev ua tau zoo, thiab cov khoom tsis zoo. Hauv - cov txheej txheem kev tshuaj xyuas feem ntau tsom rau qhov zoo li, qhov ntev, qhov ntsuas qhov cuam tshuam, thiab kev sib tsoo cov kab ntws. Kev tshuaj xyuas kev kho cua sov tsom rau cov tsos, hardness, torque, tensile zog, thiab metallography. Kev tshuaj xyuas qhov chaw kho mob feem ntau suav nrog kev kuaj hydrogen embrittlement, kuaj txheej, thiab kuaj ntsev tsuag. Kev tshuaj xyuas khoom xa tuaj suav nrog kev kuaj tshuaj lom neeg.
Rau kev soj ntsuam qhov ntev thiab qhov pom, cov cuab yeej siv tau suav nrog 2D ntsuas tshuab, tshuab ntsuas contour, tswj cov tshuab ntsuas, thiab cov duab txheeb cov tshuab (qhov no yog tag nrho - tshuab xaiv). Rau kev kuaj tshuab thiab tshuaj lom neeg, cov khoom siv hardness testers (Rockwell thiab Vickers), cov tshuab ntsuas tensile, thiab metallographic microscopes yog siv. Rau kev kuaj cov khoom siv, lub spectrometer thiab ntsev tsuag tshuaj ntsuam tshuab yog ua haujlwm.
