Nyhuv ntawm quenching Kub rau microstructure thiab khoom ntawm Dual Theem Steel

Raws li cov ntshav ntawm kev lag luam, roj plays ib qho tseem ceeb luag hauj lwm nyob rau hauv lub zog lub tswv yim. Tam sim no, tus yuam sij rau ua roj ntau lawm nyob rau hauv Tuam Tshoj yog los txhim kho cov roj drilling tshuab. Lub expandable raj technology yog ib qho tseem ceeb tshiab roj thiab cov nkev engineering technology uas tau ua thiab tsim nyob rau thaum xaus ntawm lub xyoo pua xeem thiab thaum pib ntawm no caug xyoo. Nws yog ib tug txhua yam los yog hydraulic txoj kev siv underground kom tshem tau cov casing ntawm sab saum toj mus rau nram qab los yog hauv qab mus rau saum. Lub steel yog mus tas li plastically deformed mus cuag lub hom phiaj ntawm lub casing tom qab expansion kaw lub casing phab ntsa. Kev siv cov expandable raj technology yuav heev kom tus lawm efficiency ntawm drilling engineering nyob rau hauv roj thiab cov nkev txoj kev loj hlob, txuag manpower, cov ntaub ntawv, lub sij hawm thiab nqi, thiab tsav txoj kev loj hlob ntawm lwm yam technologies. Lub US roj av engineering txoj cai ua noj yog hais txog mus rau lub expansion raj technology raws li "roj drilling". Lub hli tsaws project yog ib qhov tseem ceeb technologies nyob rau hauv lub xyoo pua 21st roj thiab cov nkev kev lag luam, thiab cov expansion yeeb nkab khoom yog ib tug ntawm cov feem ntau teeb meem tseem ceeb nyob rau hauv lub expansion cov yeeb nkab tshuab.

Lub ob lub tsev steel qauv yog tsuas yog tsim los ntawm cov ferrite thiab martensite, kuj hu ua martensite ob lub tsev steel. Nws muaj tus yam ntxwv uas tsis muaj tawm los extension, tsis tshua muaj tawm los lub dag lub zog, siab tensile zog thiab zoo plasticity txuam, thiab yuav tsum ua tus nyiam khoom siv rau lub expansion ntawm cov roj kev lag luam. Lub zoo heev thaj chaw ntawm ob lub tsev steels nyob ntawm seb tsuas yog nyob rau hauv lub morphology thiab muaj nuj nqis ntawm martensite, thaum lub sij hawm quenching kub muaj ib tug decisive cawv rau tus nqi ntawm cov martensite nyob rau hauv ob lub tsev steels.

Cov tshuaj nyob tus yeees ntawm haum ob lub tsev steel rau expansion raj tau tsim. Cawv ntawm quenching kub nyob rau microstructure thiab txhua yam khoom ntawm ob lub tsev steel yog kawm. Cov kev tshwm sim qhia tias raws li cov quenching kub nce, lub martensite volume feem maj tsub kom, uas ua rau ib qho kev nce nyob rau hauv tawm los lub dag lub zog thiab tensile zog. Thaum lub quenching kub yog 820 ° C, tus expansion raj peev xwm ua tau qhov zoo tshaj plaws zuag qhia tag nrho kev kawm nrog ob lub tsev steel.

 


Post lub sij hawm: ti-15-2019
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