Rau qhov cuam tshuam rau cov hlau ntws thaum Extrusion ntawm titanium alloy cov ntaub ntawv
Lub thermal conductivity ntawm titanium pas nrig thiab titanium alloy pas nrig billet yog tsawg, uas yuav ua rau ib tug loj kub sib txawv ntawm lub nto txheej thiab lub puab txheej thaum kub extrusion. Thaum qhov kub ntawm lub tog raj kheej extrusion yog 400 degrees, qhov kub sib txawv tuaj yeem ncav cuag 200 ~ 250 degrees. Raws li kev sib koom ua ke ntawm kev nqus cua kom muaj zog thiab qhov kub ntawm qhov sib txawv loj hauv seem billet, cov hlau ntawm qhov chaw thiab qhov nruab nrab ntawm lub billet ua rau cov khoom sib txawv ntawm cov khoom thiab cov khoom yas, uas yuav ua rau tsis sib xws heev thaum lub sij hawm extrusion txheej txheem. Ib qho loj ntxiv tensile kev ntxhov siab yog tsim nyob rau hauv nruab nrab, uas dhau los ua qhov chaw ntawm cov kab nrib pleb thiab kab nrib pleb ntawm qhov chaw ntawm cov khoom extruded. Cov txheej txheem kub extrusion ntawm titanium rods thiab titanium alloy pas nrig cov khoom yog qhov nyuaj tshaj li ntawm aluminium alloys, tooj liab alloys, thiab txawm hlau, uas yog txiav txim los ntawm lub tshwj xeeb lub cev thiab tshuaj zog ntawm titanium rods thiab titanium alloy rods.
Kev tshawb fawb ntawm cov hlau ntws dynamics ntawm kev lag luam titanium alloys qhia tau hais tias nyob rau hauv lub cheeb tsam kub sib xws rau cov theem sib txawv ntawm txhua lub alloy, tus cwj pwm ntws ntawm cov hlau sib txawv heev. Yog li ntawd, ib qho ntawm cov ntsiab lus tseem ceeb cuam tshuam rau extrusion ntws yam ntxwv ntawm titanium rods thiab titanium alloy rods yog lub billet cua sov kub uas txiav txim siab cov hlau theem hloov lub xeev. Cov hlau ntws zoo sib xws ntau dua thaum extruded ntawm qhov kub thiab txias ntawm thaj av ib lossis thaj tsam P ntxiv dua li qhov kub ntawm thaj tsam p. Nws yog qhov nyuaj heev kom tau txais qhov chaw zoo rau cov khoom extruded. Txog tam sim no, txheej txheem extrusion ntawm titanium alloy rods yuav tsum tau siv cov roj nplua nyeem. Lub ntsiab yog vim li cas titanium yuav tsim ib tug eutectic eutectic nrog hlau-raws li los yog npib tsib xee-raws li alloy pwm cov ntaub ntawv ntawm kub ntawm 980 degrees thiab 1030 degrees, uas yuav ua rau hnyav hnyav thiab tsim kua muag ntawm cov pwm.
Lub ntsiab yam tseem ceeb cuam tshuam qhov ntws ntawm hlau thaum extrusion:
1) Extrusion txoj kev. Rov qab extrusion muaj ntau cov hlau tsis sib xws tshaj li rau pem hauv ntej extrusion, txias extrusion muaj ntau yam hlau ntws zoo li kub extrusion, thiab lubricated extrusion muaj ntau yam hlau ntws zoo li tsis-lubricated extrusion. Kev cuam tshuam ntawm txoj kev extrusion yog ua tiav los ntawm kev hloov cov kev sib txhuam.
2) Extrusion ceev. Raws li qhov extrusion ceev nce, qhov inhomogeneity ntawm cov hlau ntws nce.
3) Extrusion kub. Qhov tsis sib xws ntawm cov hlau ua kom muaj zog thaum lub extrusion kub nce thiab deformation tsis kam ntawm billet txo. Thaum lub sij hawm extrusion txheej txheem, yog hais tias cov cua kub ntawm lub extrusion lub tog raj kheej thiab cov pwm yog tsawg heev, thiab cov hlau kub sib txawv ntawm txheej txheej thiab nruab nrab txheej yog loj, qhov tsis sib xws ntawm cov hlau txaus yuav nce. Qhov zoo dua qhov thermal conductivity ntawm cov hlau, qhov sib txawv ntawm qhov kub thiab txias ntawm qhov kawg ntawm lub billet.
4) Hlau zog. Thaum lwm yam kev mob sib npaug, qhov siab dua cov hlau muaj zog, qhov sib txawv ntawm cov hlau ntau dua.
5) Pwm lub kaum sab xis. Qhov loj ntawm pwm lub kaum sab xis (uas yog, lub kaum sab xis ntawm lub ntsej muag kawg ntawm cov pwm thiab lub hauv paus axis), qhov tsis sib xws ntawm cov hlau fluidity. Thaum lub qhov tuag ntau yog siv rau extrusion, lub qhov tuag yog teem kom tsim nyog, thiab cov hlau ntws zoo li qub.
6) Qib deformation. Yog hais tias qhov degree ntawm deformation loj dhau los yog me me, cov hlau ntws yuav tsis sib npaug.
