Thaum lub sij hawm ua hauj lwm ntawm cov roj drilling av nkos twj tso kua mis, lub tog raj kheej liner yog feem ntau ua rau tsis ua hauj lwm phenomena xws li strain, zawj, tev, to, de-cylinder thiab tawg vim abrasion ntawm cov xuab zeb hais nyob rau hauv high-ceev ntws av nkos thiab yaig. ntawm corrosive nruab nrab. Txhawm rau txhim kho qhov hnav tsis kam thiab corrosion tsis kam ntawm lub tog raj kheej liner, Cr26 high-chromium cam khwb cia hlau yog tam sim no siv rau kev tsim, thiab cov dawb paug yog quenched thiab tempered ntawm qis kub tom qab annealing thiab machining. Lub hardness yuav tsum siab tshaj HRC62. Txawm li cas los xij, vim yog cov phab ntsa nyias nyias ntawm lub tog raj kheej liner (6=5.5mill, 7illm), 100 feem pua ntawm kev kho cua sov muaj qhov sib txawv ntawm deformation, tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua, yuav tsum tau ntxiv cov txheej txheem shaping, uas tsis yog. tsuas yog nce tus nqi ntawm cov txheej txheem, tab sis kuj yog ib feem ntawm lub tog raj kheej liner tau muab pov tseg vim muaj ntau yam shaping. Cov hauv qab no tuaj yeem siv los tiv thaiv cov av nkos Lub twj tso kua mis lub tog raj kheej liner yog quenched thiab deformed.
First: In order to prevent quenching and deformation of petroleum mud pump cylinder liner, lower heating temperature (980℃) and slower cooling rate (air cooling) should be adopted as far as possible. When the hardness HRC>60 yog yuav tsum tau, Cr26 siab chromium cam khwb cia hlau cov khoom yuav tsum tau siv Cov CrC piv ntawm cov txheej txheem saum toj no yog 8.9-9.6.
Thib ob: Txhawm rau tiv thaiv qhov cuam tshuam ntawm cov qauv, cov duab thiab cov cua kub dissipation ntawm cov khoom pob tawb ntawm lub workpiece, lub workpiece yuav tsum tau muab tshem tawm ntawm lub pob tawb kom sai li sai tau, thiab cov cua txias yuav tsum tau dispersed, tab sis deformation los ntawm clamping. Thaum kub kub yuav tsum tau zam. . Vim qhov rov ua cua sov thiab txias ntawm lub pob tawb, cov nqaj txhawb nqa welded rau hauv qab phaj ntawm lub pob tawb yuav deformed. Yog li ntawd, qhov flatness ntawm ntug ntawm lub nqaj txhawb nqa yuav tsum tau kuaj xyuas tsis tu ncua thiab khaws cia nyob rau hauv qhov kev tso cai kam rau ua los ntawm cov txheej txheem kho.
