Q1: Cov kauj ruam tseem ceeb hauv cov txheej txheem ntawm 12cr1movg steel kav?
Steelmaking siv cov hluav taws xob hluav taws xob ua ke nrog LF / VD ua kom zoo nkauj sulfur thiab phosphorat cov cai (s sib npaug los yog sib npaug lossis sib npaug 0.025%). Electromagnetic stirring yog siv thaum nruam nruam kom txo tau cais, thiab kev cuam tshuam kom tiv thaiv kom tsis txhob tawg. Kub Rolling siv lub tho thiab yob cov txheej txheem, nrog rau qhov kawg yob kom sov thaum 850 thiab 880 degree. Kev kho cua sov yuav tsum muaj qhov kev kho cua sov ib txwm muaj thiab ua kom muaj kev sib txawv ntawm cov qauv kub. Thaum kawg, ut / thiab tsis muaj kev sim ua haujlwm thiab cov cuab yeej kuaj cov cuab yeej yog ua.
Q2: Vim li cas thiaj li ib txwm thiab npau taws heev rau 12cr1movg?
Li qub (930-960 degree) homogenizes tus Austenite thiab tshem tawm cov banding. Tempering (680-730 DEGREE) txhawb nqa carbide nag lossis kev txhim kho kev nyuaj thiab kev ruaj khov. Tus txheej txheem no ua tiav qhov zoo tshaj plaws ua ke cov khoom siv neeg kho tshuab (lub zog + ductility + kev nruj). Kev kub-kub cov teeb meem ntawm cov unseat-kho cov kav hlau steel yog txo. GB 5310 qhia meej meej yuav tsum tau ib txwm thiab tempering raws li yuav tsum tau xa khoom.
Q3: Cov teeb meem dab tsi nyob rau hauv 12cr1movg welded steel yeeb nkab?
Lub Vuam cov neeg siv tau yuav tsum phim lub hauv paus hlau muaj pes tsawg leeg (piv txwv li, R317 Vuam pas nrig, CR-Mo-V series). Preheat rau 200-250℃ua ntej vuam, thiab tswj lub intral qhov kub ntawm 200-300 degree. Sai li sai tau tom qab vuam, kev nyuaj siab nyem kev kho mob ntawm 720-750℃kawm. Kev ntsuam xyuas WTDS yuav tsum tau 100% RT + siv xeem kom ntseeg tau qhov tsis tiav ntawm Fusion Fusion / Cracks. Rau cov kav hlau tuab, cov kav hlau tuab, vuam yuav tsum tau ua nyob hauv cov ntu nrog cov tswv yim tshav kub (15-25 KJ / CM).
Q4: How can the core properties of thick-walled 12Cr1MoVG steel pipes (>50 hli) tau lav?
The steel ingots must be forged with center compaction, with a compression ratio ≥3:1. During rolling, a high reduction ratio (>60% yog siv los tshem tawm qhov tsis xws luag tseem ceeb. Lub sijhawm sib raug zoo yog suav ua 2.5 min / hli (piv txwv li, 4 teev rau 100mm phab ntsa tuab). Cov qauv tseem ceeb tau coj mus xyuas qhov cuam tshuam cuam tshuam rau lub zog (ntau dua lossis sib npaug ntawm 27J) thiab ntaus nrig sib luag. Kev kuaj ultrasonic yog ua kom pom tseeb ntawm qhov tsis xws luag (tiaj-hauv qab qhov yog ntau dua lossis sib npaug rau 3 hli raug tsis lees paub).
Q5: Cov Qauv Tseem Ceeb rau 12Cr7Movg Steel Kave?
Cov Txheej Txheem Hauv Tebchaws: GB 5310 (Cov Tsheb Siab High boiles boiles) thiab GB 9948 (Petroleum Cracking Leeg). Cov Txheej Txheem Thoob Ntiaj Teb: ASTM A335 P11 (American txheem) thiab en 10216-2 (European Txuj Ci). Cov Kev Siv Tshwj Xeeb: ASME SA335 (rau kev siv hluav taws xob nuclear) thiab JIS G3463 (Japanese txheem). CE / PED ntawv pov thawj thiab daim ntawv qhia kev ua tau kub yog tsim nyog rau kev xa tawm.
