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Mine lub tsheb tom qab loj forgings forging kev kho cua sov

Harmfulness dawb Point dawb Point 1.1 yog ib tug kab nrib pleb sab hauv los ntawm hydrogen hauv xeev steel, khoom kub hydrogen ntsiab lus hauv cov hlau, cov hlau yuav nkig yig, qog, hauv tej tee dawb dawb kuj tsis nkig. Qhov kuaj pom muaj tej tee dawb dawb kom cov khoom ntawm tus hlau, feem ntau yog cov qaub ruaj transverse ductility thiab toughness, txhua yam kuj yog qhov chaw uas puas, tiag rau txoj kev kawm thiab txoj hauj lwm ntawm qhov chaw. Vim li no, cov forging thaum cov dawb taw tes, yuav tsum tau scrapped lub forging.

1.2 morphology dawb dots nyob rau ntawm qhov chaw puas ntawm cov forging longitudinal kev taw qhia tshwm sim ua ntse hau npawv dawb dawb nyiaj dab tsi; tsis tshua muaj magnification hauv lub nrws transverse li me kab plaub hau tawg, lub sijhawm uas ob peb millimeters, lub kaum tawm ib millimeters.

1.3 thiab ua tej tee dawb dawb uas ua los ntawm txoj kev kub tom qab forging, hlau thiab hydrogen kev nyuaj siab (deformation kev nyuaj siab, kev nyuaj siab thermal, muaj quas kev nyuaj siab, tshwj xeeb tshaj yog rau cov kev nyuaj siab) nyob rau hauv lub neej coj nyhuv ua. Tej tee dawb dawb uas muaj kub yog txias rau lub VOJVOOS forging kuj tsis tshua muaj kub txog li 250 ℃ kom sov no ntau yam.

1.4 stresses sib cog cov hydrogen thiab ua tej tee dawb hauv cov ntawv nyeem tag [2 cais taw tes qhia: "muaj ib txhais tias cov hlau hydrogen nyiaj yog ib tug mob txaus rau qhov uas muaj tej tee dawb dawb, tsis muaj kev nyuab siab sab hauv yuav txhawb qhov uas muaj tej tee dawb dawb nyhuv, ces supersaturated hydrogen cov tseem yuav tsim dawb dots 'culprit' , hos cov nrog kev nyuab siab yog 'accomplice'. "heev kom hais qhov kev sib raug zoo ntawm tus ob tej tee dawb dawb.


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