1. Kev Tshawb Fawb Txog Hlau
Metallography yog ib qho ntawm cov txheej txheem tseem ceeb rau kev sib txawv ntawm cov kav hlau welded los ntawmcov kav hlau tsis muaj seamlessCov kav hlau uas siv cov hlau vuam uas muaj zaus siab tsis ntxiv cov khoom siv vuam, yog li ntawd cov xov hlau vuam hauv cov kav hlau vuam nqaim heev. Yog tias siv txoj kev sib tsoo ntxhib thiab tom qab ntawd siv cov hlau xeb, cov xov hlau vuam yuav tsis pom tseeb. Thaum cov kav hlau vuam uas siv cov hlau vuam uas muaj zaus siab tsis tau vuam thiab tsis tau kho cua sov, cov qauv vuam yuav txawv ntawm cov khoom niam txiv ntawm cov kav hlau. Lub sijhawm no, txoj kev metallographic tuaj yeem siv los sib txawv cov kav hlau vuam thiab cov kav hlau tsis sib txuas. Thaum sib txawv ob lub kav hlau, nws yog qhov tsim nyog los txiav ib qho qauv me me nrog qhov ntev thiab dav ntawm 40 hli ntawm qhov chaw vuam, ua kev sib tsoo ntxhib, kev sib tsoo zoo thiab kev txhuam, thiab tom qab ntawd saib cov qauv hauv qab lub tshuab kuaj metallographic. Thaum pom ferrite thiab widmanstatten, cov khoom niam txiv thiab cov qauv thaj tsam vuam, cov kav hlau vuam thiab cov kav hlau tsis sib txuas tuaj yeem sib txawv tau zoo.
2. Txoj kev xeb
Thaum siv txoj kev xeb los cais cov kav hlau welded thiab cov kav hlau seamless, qhov vuam ntawm cov kav hlau welded uas tau ua tiav yuav tsum tau polished. Tom qab polishing tiav lawm, yuav tsum pom cov cim polishing. Tom qab ntawd, lub ntsej muag kawg yog polished nrog sandpaper ntawm qhov vuam, thiab lub ntsej muag kawg yog kho nrog 5% nitric acid cawv kua. Yog tias qhov vuam pom tseeb tshwm sim, nws tuaj yeem ua pov thawj tias cov kav hlau yog cov kav hlau welded. Tsis muaj qhov sib txawv pom tseeb ntawm lub ntsej muag kawg ntawm cov kav hlau seamless tom qab xeb.
3. Sib txawv cov kav hlau welded thiab cov kav hlau seamless raws li cov txheej txheem
Nyob rau hauv tus txheej txheem ntawm kev sib txawvcov kav hlau vuamthiab cov kav hlau tsis muaj seamless raws li cov txheej txheem, txhua cov kav hlau welded raug welded raws li cov txheej txheem xws li txias dov thiab extrusion. Tsis tas li ntawd, thaum cov kav hlau high-frequency, low-frequency arc vuam thiab cov kav hlau tsis kam siv los vuam cov kav hlau, cov kav hlau kauv vuam thiab cov kav hlau ncaj seam vuam yuav tsim, uas yuav tsim cov kav hlau puag ncig, cov kav hlau square, cov kav hlau oval, cov kav hlau triangular, cov kav hlau hexagonal, cov kav hlau wilted, cov kav hlau octagonal, thiab cov kav hlau nyuaj dua. Hauv ntej, cov txheej txheem sib txawv yuav tsim cov kav hlau ntawm ntau yam duab, yog li cov kav hlau welded thiab cov kav hlau seamless tuaj yeem sib txawv meej. Txawm li cas los xij, hauv cov txheej txheem ntawm kev sib txawv cov kav hlau seamless raws li cov txheej txheem, lawv feem ntau sib txawv raws li cov txheej txheem kub dov thiab txias dov, thiab cov kav hlau seamless kuj muaj ob daim ntawv tseem ceeb, uas yog cov kav hlau seamless kub dov thiab cov kav hlau seamless txias dov. Cov kav hlau seamless kub dov yog tsim los ntawm kev perforation, dov thiab lwm yam txheej txheem, tshwj xeeb tshaj yog cov kav hlau seamless loj thiab tuab yog welded los ntawm cov txheej txheem no; cov kav dej txias yog tsim los ntawm kev kos cov kav dej txias, thiab lub zog ntawm cov khoom siv qis dua, tab sis nws cov nplaim sab nraud thiab sab hauv yog du.
Lub sijhawm tshaj tawm: Tsib Hlis-17-2024