1. Puas yog 45 # seamless steel yeeb nkab siv los ua kom siab - lub zog bolts?
Teb: Yog. 45# seamless steel yeeb nkab muaj lub zog siab thiab hardness (lub zog tensile 600-}750MPa tom qab quenching thiab tempering), thiab tom qab precision ua (tig, threading), nws tuaj yeem ua rau lub zog siab bolts rau cov cuab yeej siv tshuab, kev tsim kho thiab lwm yam uas xav tau kev sib txuas siab. Txawm li cas los xij, nws yuav tsum tau ua kom nruj quenching thiab tempering kub kho kom ntseeg tau tias lub toughness thiab qaug zog tsis kam ntawm bolts.
2. Tus qauv twg 15CrMoG seamless steel yeeb nkab ua raws li, thiab nws cov yam ntxwv ntawm cov tshuaj muaj pes tsawg leeg yog dab tsi?
Teb: 15CrMoG seamless steel yeeb nkab ua raws GB / T 3087 ( nruab nrab thiab qis siab boiler raj) los yog GB / T 5310 (siab siab boiler raj). Nws cov yam ntxwv ntawm cov tshuaj muaj pes tsawg leeg: C (0.12%-0.18%), Si (0.17%-0.37%), Mn (0.40%-0.70%), Cr (0.80%-1.10%), Mo (0.40%-0.55%), P Tsawg dua lossis sib npaug li 0.035%, Qhov sib ntxiv ntawm Cr thiab Mo cov ntsiab lus txhim kho nws qhov kub thiab txias zog thiab oxidation kuj.
3. Dab tsi yog qhov siab tshaj plaws uas 20 # seamless steel yeeb nkab tuaj yeem dais?
Teb: Qhov siab tshaj plaws ntawm cov kabmob siab ntawm 20 # seamless steel yeeb nkab nyob ntawm nws phab ntsa thickness, txheej kab thiab ua haujlwm kub. Nyob rau hauv ib txwm kub (20 degree), rau ib tug 20 # seamless steel yeeb nkab nrog txheej inch 57mm thiab phab ntsa thickness 3.5mm, lub siab tshaj plaws tso cai ua hauj lwm siab yog hais txog 4.0-5.0MPa. Lub thickness ntawm phab ntsa, qhov siab dua cov kabmob; qhov siab dua qhov ua haujlwm kub, qhov qis ntawm cov kabmob siab.
4. Dab tsi yog daim ntawv thov scenario ntawm Q345B seamless steel yeeb nkab?
Teb: Q345B seamless steel yeeb nkab yog qhov qis- alloy siab- lub zog steel yeeb nkab, nrog lub zog yield Ntau dua lossis sib npaug li 345MPa, cov cuab yeej siv tau zoo thiab kev ua haujlwm vuam. Nws yog dav siv nyob rau hauv kev tsim kho, choj, machinery, roj av, tshuaj thiab lwm yam lag luam, xws li lub tsev steel lug, choj kev txhawb nqa, mechanical brackets, nruab nrab thiab siab siab kua thauj pipelines thiab offshore platform Cheebtsam.
5. Yuav ua li cas kom paub qhov zoo ntawm seamless steel kav?
Teb: Cov kev kuaj pom zoo ib yam muaj xws li: ① Kev kuaj tshuaj muaj pes tsawg leeg (spectrometer) los xyuas seb cov tshuaj muaj pes tsawg leeg ua tau raws li tus qauv; ② Mechanical Performance Test (Tensile Test, Impact Test, Hardness Test) los xyuas kom meej lub zog, toughness thiab hardness; ③ Tsis yog- kuaj kev puas tsuaj (kev kuaj ultrasonic, kuaj hluav taws xob) txhawm rau txheeb xyuas qhov tsis xws luag sab hauv (xws li cov kab nrib pleb, suav nrog) thiab qhov tsis xws luag (xws li khawb, qhov chaw); ④ Dimensional detection (calipers, micrometers) los xyuas cov kab sab nraud, phab ntsa thickness thiab ovality.
