1. Yuav ua li cas txhawm rau txhim kho corrosion ntawm 4130 alloy steel seamless yeeb nkab?
Kev tiv thaiv corrosion ntawm 4130 alloy steel seamless yeeb nkab tuaj yeem txhim kho los ntawm cov txheej txheem hauv qab no: ① Kev kho deg: xws li galvanizing (kub-dip galvanizing lossis electro- galvanizing), uas tsim cov zinc txheej tiv thaiv ntawm qhov chaw kom tiv thaiv cov hlau hauv qab los ntawm huab cua thiab noo noo. ② Chrome plating: ua ib qho nyuaj thiab corrosion- chrome txheej, uas yog tsim rau hnyav corrosion puag ncig. ③ Kev kho tshuaj lom neeg: xws li phosphating, uas tsim cov phosphate zaj duab xis rau saum npoo los txhim kho cov adhesion ntawm txheej thiab txhim kho corrosion kuj. ④ Kev xaiv ntawm corrosion- cov coatings resistant: xws li epoxy resin txheej, polyurethane txheej, thiab lwm yam., uas cais cov yeeb nkab los ntawm nruab nrab corrosive.
2. Txoj kev kho cua sov ntawm 12Cr1MoV seamless yeeb nkab yog dab tsi, thiab nws lub hom phiaj yog dab tsi?
12Cr1MoV seamless yeeb nkab feem ntau txais yuav normalizing + tempering kub kho. Cov txheej txheem yog: ua ntej, cua sov rau 950-980℃rau normalizing, tuav rau ib lub sijhawm, txias hauv huab cua; Tom qab ntawd kub rau 720-760℃rau tempering, tuav rau 2-3 teev, thiab txias hauv huab cua. Lub hom phiaj ntawm kev kho cua sov yog: ① Txhim kho cov qauv ntawm cov nplej, tshem tawm cov kev ntxhov siab sab hauv thaum dov thiab forging. ② Txhim kho qhov kub-kub creep tsis kam thiab oxidation tsis kam ntawm cov yeeb nkab. ③ Kho cov khoom siv kho tshuab kom ua tau raws li qhov yuav tsum tau ua ntawm qhov kub thiab txias kev pabcuam, kom ntseeg tau tias cov yeeb nkab muaj lub zog txaus thiab tawv.
3. Puas yog 4340 alloy steel seamless yeeb nkab siv rau hauv siab -siab hydraulic systems? Vim li cas?
Yog lawm, 4340 alloy steel seamless yeeb nkab yog haum rau siab -siab hydraulic systems. Cov laj thawj yog: ① Nws muaj lub zog siab thiab tawv heev tom qab quenching thiab tempering, nrog qhov tsawg kawg nkaus lub zog ntawm 1034 MPa, uas tuaj yeem tiv taus siab hydraulic siab (txog 300 MPa lossis siab dua) yam tsis muaj deformation lossis rupture. ② Nws muaj kev qaug zog zoo, uas tuaj yeem hloov mus rau qhov kev hloov pauv siab hauv cov tshuab hydraulic thiab zam kev qaug zog tsis ua haujlwm. ③ Nws muaj kev ua haujlwm zoo, uas tuaj yeem ua tiav rau hauv ntau yam hydraulic Cheebtsam (xws li hydraulic kheej kheej, hydraulic kav) nrog siab precision.
4. Lub luag haujlwm ntawm molybdenum hauv 4130 alloy steel seamless yeeb nkab yog dab tsi?
Molybdenum (Mo) yog ib qho tseem ceeb ntawm cov hlau alloying nyob rau hauv 4130 alloy steel, thiab nws lub luag haujlwm tseem ceeb yog: ① Txhim kho lub hardenability ntawm cov hlau, ua rau cov yeeb nkab tuaj yeem tau txais cov khoom sib xws thiab siab - lub zog muaj zog tom qab kev kho cua sov, txawm tias tuab - cov kav dej. ② Txhim kho qhov siab - qhov kub thiab txias tsis kam ntawm cov hlau, tso cai rau cov yeeb nkab kom ruaj khov ua haujlwm nyob rau hauv siab - qhov kub thiab txias. ③ Txhim kho qhov hnav tsis kam thiab corrosion kuj ntawm cov hlau, tshwj xeeb tshaj yog nyob rau hauv corrosive media xws li dej thiab roj. ④ Txo qhov kev xav ntawm temper brittleness, kom ntseeg tau tias cov yeeb nkab muaj zoo toughness tom qab tempering.
5. Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm 304 stainless hlau seamless yeeb nkab, thiab nws cov yam ntxwv corrosion kuj yog dab tsi?
Cov tshuaj lom neeg muaj pes tsawg leeg ntawm 304 stainless hlau seamless yeeb nkab yog: Carbon (C) Tsawg dua los yog sib npaug rau 0.08%, Chromium (Cr) 18.00-20.00%, Nickel (Ni) 8.00-12.00%, Manganese (Mn) Less dua los yog sib npaug rau Pho. Sulfur (S) Tsawg dua lossis sib npaug li 0.030%, Silicon (Si) Tsawg dua lossis sib npaug li 1.00%. Nws cov yam ntxwv tiv thaiv corrosion yog: ① Nws muaj kev tiv thaiv zoo heev rau atmospheric, dej tshiab, thiab feem ntau cov organic acids (xws li acetic acid, citric acid). ② Nws tiv taus corrosion los ntawm nruab nrab ntsev thiab tsis muaj zog alkalis, tab sis tsis tiv taus cov tshuaj chloride ion corrosion (yooj yim ua rau pitting corrosion). ③ Nws muaj qhov zoo oxidation tsis kam, uas tuaj yeem siv rau hauv qhov chaw kub kub txog li 870℃(kev pabcuam txuas ntxiv) yam tsis muaj oxidation pom tseeb.
