Ukuphosa kwindawo yokugoba okanye yokuqondisa kuya kubangela ingxaki yokuqhekeka komphetho ngexesha lokuguqulwa kokuchola.umbhobho ongenamthungo.
I-0Cr15mm9Cu2nin kunye ne-0Cr17Mm6ni4Cu2N insimbi engenasici ye-200 series austenitic steel stainless steel, eyahlukileyo kuthotho lwama-200 kunye nama-300 series austenitic.yenziwe ngentsimbi eshayinayo.Olu hlobo200steel stainless square tubeiqhelene neentanda, iintanda zomphezulu, Ingxaki yomgangatho ombi wokubumba wokonakala komphetho.Kwimveliso yangempela eshushu eshushu, iintlobo ezimbini zetsimbi zisebenzisa ii-curves ze-200 zokufudumeza, kwaye ukushisa kwesithando somlilo kulawulwa kwi-1215-1230C.Inkqubo yayo ye-thermal isebenzisa imodeli yekhompyutheni yenqanaba lesibini "i-Rough Rolling Regulations" kunye ne "Finish Rolling Regulations".800-1020C.Ukubhekisa kweyona nkqubo ishushu yokugoqa kabiniumbhobho ongenamthungo, yenza inkqubo yokufudumeza kunye nobushushu be-deformation yale ndlela yokuvavanya, kwaye emva koko uqhube uvavanyo oluyimpompo olushushu kwisixhobo sokuvavanya esishushu esiyilwe kwaye senziwe sithi.Ulwazi lwanamhlanje lombutho wemibhobho yesikwere: usebenzisa inkqubo yokucoca i-AOD + LF ukuvelisa i-0Cr15Mm9Cu2Nn kunye ne-0Cr17I6ni4Cu2N i-pickling engekho i-vascular eqhubekayo iphosa i-casting embi eqhubekayo ngokugoba ngokuthe nkqo inkqubo eqhubekayo yokuphosa, ubungakanani be-cross-sectional ye-casting eqhubekayo embi yi-12620m.Iqhezu lobunzima % libonisiwe kwitheyibhile.I-microstructure yegobolondo embi kwiindawo ezinzulu ezihlukeneyo ze-0Cr15m9Cu2Nn i-asidi-ihlanjwe i-non-vascular casting eqhubekayo, njengoko kuboniswe kumfanekiso, ihambelana nobunzulu begobolondo elibi elibi.Xa imeko engaqhelekanga isenzeka kwaye ubushushu bomda wokusakha busilela ukuhla ukuya kuluhlu oluphantsi lobushushu obuphantsi.I-microstructure kwi-15 kunye ne-25m.Ubume be-microstructure kunye nobukhulu beenkozo ze-20g ityhubhu ye-boiler ephezulu yoxinzelelo iya kunyuka kunye nobunzulu begobolondo ye-slab.Utshintsho, kodwa bonisa umahluko othile.Kubunzulu beqokobhe elingu-d0m, i-microstructure ubukhulu becala sisakhiwo se-skeleton-type dendrite, kwaye isithuba sokuqala nesesibini se-dendrite sincinci.Kwi-d5mm, ubukhulu becala sisakhiwo sedendrite.
Isithuba seDendrite sikhulu.Kwi-d>15mn, iidendrites zifana nempethu, kodwa kwi-d25m, ikakhulu ziikristale zeselula.I-microstructure ye-square ye-square ye-Cr17Im6ni4Cu2N i-slab eqhubekayo yokuphosa kwi-Fig. 1 ibonisa ukuba i-shell eqhubekayo yokuphosa igobolondo embi ngokusisiseko yisakhiwo se-dendrite.Nangona kukho iiyantlukwano ezithile kwi-morphology ye-dendrite, isakhiwo sayo siqulunqwe ikakhulu yi-gray austenite matrix, kunye ne-ferrite emnyama.Njengombhobho wesikwere we-0Cr15Mn9Cu2Nin, njengoko ubunzulu beqokobhe bukhula, isithuba se-dendrite esiseprayimari kunye nesesibini sikhula ngokuthe ngcembe, kwaye imilo ye-dendrite iyatshintsha ukusuka kwi-skeleton ukuya kwi-worm., Ukuziphatha kweplastiki kwinkqubo yokuguqulwa kwesigaba se-martensitic kwimibhobho yentsimbi ekwazi ukumelana nokunxiba yahlalutywa ngovavanyo, kunye nobungakanani bengqolowa ye-austenite kunye nomthetho wayo wokukhula okuziinkozo, i-martensite orientation, i-plastiki yenguqu yesigaba, imiphumo yoxinzelelo kunye ne-morphology kwiipropati zomatshini. imibhobho yentsimbi edityanisiweyo enganxitywanga.Phantsi kwemeko yobushushu 1010 austenitization 15mir, iqondo lobushushu lokuqala s kunye neqondo lobushushu ekupheleni ㎡ of martensitic inguqu ukwanda kunye nokwanda kweqondo lobushushu austenitization, kunye neparameters kwisigaba soguqulo imodeli yeplastiki ukunxitywa-resistant umbhobho wentsimbi utshintsho utshintsho kunye nokunyuka kunye ukwandisa uxinzelelo olulinganayo.Xa ubushushu be-austenitization bungaphantsi kwe-1050C, ukukhula kweenkozo kubonisa inkqubo eqhelekileyo yokukhula.Ngokunyuka kwexesha le-austenitization, intsimbi ejikelezayo s iyanda.-I-3500 yokulinganisa i-thermal, ukuziphatha kweplastiki yombhobho wensimbi ongenakunqanda ukunxiba ngexesha lenkqubo yokuguqulwa kwe-martensitic yahlaziywa ngovavanyo, kunye nobukhulu bengqolowa ye-austenite kunye nomthetho wayo wokukhula kwengqolowa ye-austenite yaphononongwa, kunye ne-martensite Effects of orientation, iplastiki yokuguqulwa kwesigaba, uxinzelelo kunye ne-morphology kwiipropati ze-mechanical of wear-resistant composite steel pipes.Phantsi kwemeko ye-1010 austenitization yemizuzu eyi-15, iqondo lobushushu lokuqala s kunye nendawo yobushushu bokuphela ㎡ yokwanda kwenguqu ye-martensitic kunye nokunyuka kobushushu be-austenitization, kunye nepharamitha K kwimodeli yenguqu ye-plastiki yenqanaba lokunxiba-resistant umbhobho wentsimbi inyuka kunye uxinzelelo olulinganayo.Xa ubushushu be-austenitizing bungaphantsi kwe-1050C, ukukhula kweenkozo kubonisa inkqubo eqhelekileyo yokukhula.Njengoko ixesha le-austenitizing lisanda, Ngaba ukwanda, kunye nokuguqulwa kwesigaba se-B sahlulwe kwimida yengqolowa.I-nucleation kunye nokukhula kwezigaba kwaye Kukho izigaba ezibini ze-nucleation kunye nokukhula kwe-Widmanite a.isigaba.Xa izinga lokupholisa linyuswa ukusuka kwi-0.1C / s ukuya kwi-150C / s, inkqubo yokuguqulwa kwesigaba se-B + a kunye + iyenzeka kakhulu kwi-alloy ye-Ti-55.Iinkozo kumbhobho wentsimbi odityanisiweyo ongaguqukiyo zisenokuhlala zifana kwaye zincinci, kwaye i-martensite Fine coherent complex carbides yancipha phezu komhlaba.Ukusebenzisa i-electron microscope yothumelo, ukuskena i-electron microscope, i-x-ray diffractometer kunye neendlela ze-electrochemical ukufunda ubume be-microstructure kunye neempawu ze-electrochemical zengxubevange yombhobho wentsimbi ekwazi ukumelana nokunxitywa kumazwe ahlukeneyo afana ne-cast state, i-homogenized state, kunye nemo yemoto, kunye ne-electron probe EPM. i-morphology kunye nokubunjwa kwe-precipitates eziphambili kwipayipi yensimbi engaguqukiyo efakwe kwi-150-300C yaphandwa ngohlalutyo lwe-spectrum yamandla.
Ixesha lokuposa: Mar-30-2023