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Icyuma cya 20MnTiB nicyo kintu gikoreshwa cyane mungufu za bolt zikoreshwa mu biraro byubaka ibyuma mu gihugu cyanjye, kandi imikorere yacyo ifite akamaro kanini mu mikorere y’ikiraro itekanye. Hashingiwe ku iperereza ry’ibidukikije byo mu kirere cya Chongqing, ubu bushakashatsi bwateguye igisubizo cyangirika kigereranya ikirere cy’ubushyuhe bwa Chongqing, kandi cyakoze ibizamini byo kwangirika kw’imihindagurikire y’ikirere. kwibanda kumyitwarire yo kwangirika kwa 20MnTiB imbaraga-zikomeye zakozweho ubushakashatsi.
20MnTiB ibyuma nibikoresho bikoreshwa cyane-imbaraga za bolt zikoreshwa mubiraro byubatswe nicyuma mugihugu cyanjye, kandi imikorere yacyo ningirakamaro cyane mubikorwa byumutekano byikiraro.Li nibindi.1 yagerageje imiterere yicyuma cya 20MnTiB gikunze gukoreshwa mu cyiciro cya 10.9-imbaraga zikomeye mu bushyuhe bwo hejuru bwa 20 ~ 700 and, kandi yabonye umurongo uhangayitse, imbaraga zitanga imbaraga, imbaraga zingana, Modulus ya Young, no kuramba.no kwagura coefficient.Zhang n'abandi.2, Hu n'abandi.3, nibindi.
Bolt ifite imbaraga nyinshi kubiraro byicyuma mubisanzwe bikoreshwa mugihe kirekire ahantu h’ubushuhe.Ibintu nkubushuhe bwinshi, ubushyuhe bwo hejuru, hamwe no gutembera no kwinjiza ibintu byangiza ibidukikije birashobora gutera byoroshye kwangirika kwibyuma byibyuma. Kwangirika bishobora gutera imbaraga zikomeye za bolt kwambukiranya ibice, bikaviramo no gukomera kwinshi ndetse no guturika bikabije. ubushakashatsi bwinshi ku ngaruka zo kwangirika kw'ibidukikije ku mikorere yo kwangirika kw'ibikoresho.Catar et al4 yakoze iperereza ku myitwarire yo kwangirika kwa magnesium alloys irimo ibintu bitandukanye bya aluminiyumu irimo aside irike, alkaline n'ibidukikije bidafite aho bibogamiye hifashishijwe ibizamini bitinda (SSRT) .Abdel et al.5 bakoze ubushakashatsi ku mashanyarazi ya Cu10Ni. imikorere ya magnesium alloy MRI230D muri 3,5% NaCl igisubizo cyikizamini cyo kwibiza, ikizamini cyo gutera umunyu, isesengura rya polarisiyumu ya polarisiyasi na SSRT.Zhang nabandi.7 bakoze ubushakashatsi ku myitwarire yo kwangirika kwicyuma cya 9Cr martensitike ikoresheje SSRT hamwe nubuhanga gakondo bwo gupima amashanyarazi ya choride hamwe na ruswa ya ruswa ya rusike ya ruswa. ibyuma mubisubizo byicyondo byinyanja birimo SRB mubushyuhe butandukanye na SSRT.Liu et al.9 yakoresheje SSRT kugirango yige ingaruka zubushyuhe hamwe nigipimo cyumuvuduko ukabije wamazi yo mu nyanja yangirika kwangirika kwicyuma cya 00Cr21Ni14Mn5Mo2N austenitic ibyuma bitagira umwanda.Ibisubizo byerekana ko ubushyuhe buri murwego rwa 35 ~ 65 ℃ nta ngaruka zikomeye zifite.10 yasuzumye gutinda kuvunika kwangirika kwicyitegererezo hamwe ningero zinyuranye zingufu zingirakamaro hamwe numutwaro wapfuye watinze kwipimisha kuvunika na SSRT.Birasabwa ko imbaraga zingutu zicyuma cya 20MnTiB hamwe na 35VB ibyuma byimbaraga zikomeye zigomba kugenzurwa kuri 1040-1190MPa.Nyamara, ibyinshi mubushakashatsi bikoresha cyane cyane ibidukikije bikoresha imbaraga nyinshi kugirango bigereranye ibidukikije byoroheje, mugihe ibintu byinshi bikoresha imbaraga nyinshi. nka pH agaciro ka bolt.Ananya nabandi.11 yize ku ngaruka z'ibidukikije n'ibikoresho mu buryo bwangirika ku kwangirika no guhangayika kwangirika kwa duplex idafite ibyuma.Sunada n'abandi.12 bakoze ubushakashatsi bwibipimo byubushyuhe bwicyumba kumashanyarazi ya SUS304 mubisubizo byamazi arimo H2SO4 (0-5.5 kmol / m-3) na NaCl (0-4.5 kmol / m-3) .Ingaruka za H2SO4 na NaCl kumiterere ya ruswa yibyuma bya SUS304 hamwe nubushyuhe bwa CO2 rosion yoroha yicyuma cya A516 cyumuvuduko wicyuma.Ukoresheje igisubizo cya NS4 nkamazi yubutaka yigana igisubizo, Ibrahim nibindi.14 yakoze ubushakashatsi ku ngaruka z’ibidukikije nka ion ya bicarbonate (HCO), pH nubushyuhe ku ihungabana ry’imihindagurikire y’icyuma cya API-X100 nyuma yo gukuramo igifuniko.Shan n'abandi.15 yize amategeko atandukanye yo guhangayikishwa no kwangirika kwangirika kwangirika kwicyuma cya austenitike idafite ibyuma 00Cr18Ni10 hamwe nubushyuhe mubihe bitandukanye byubushyuhe (30 ~ 250 ℃) bitewe nubushyuhe bwamazi yumukara mu ruganda rw’amakara-hydrogène rwakozwe na SSRT.Han et al.16 yaranze ingaruka za hydrogène yatewe ningaruka zipimishije zipima SS2. imyitwarire yo kwangirika kwa GH4080A ivangwa na SSRT.Ibisubizo byerekana ko uko agaciro ka pH kagabanutse, niko birushaho kuba bibi kurwanya ruswa ya GH4080A.Bifite imbaraga zo kwangirika kwangirika kuri Cl-1, kandi ntabwo byumva uburyo bwa SO42- ionic kurwego rwubushyuhe bwicyumba.
Mu rwego rwo kumenya impamvu zananiwe gutsindwa n’ingufu zikomeye zikoreshwa mu biraro, umwanditsi yakoze ubushakashatsi butandukanye. Hatoranijwe ingero zikomeye za bolt, kandi n’impamvu zatumye izo ngero zananirana zaganiriweho hashingiwe ku miterere y’imiti, imiterere ya microscopique morphologie, imiterere y’imiterere y’imiterere y’imiterere y’imiterere ya Chongqing mu myaka yashize. Ubushakashatsi bwa rosion, ubushakashatsi bwa ruswa yamashanyarazi hamwe nubushakashatsi bwumunaniro wa ruswa ya chongqing y’ikirere cyigana cy’ikirere cyakozwe.Muri ubu bushakashatsi, ingaruka z’ubushyuhe, agaciro ka pH hamwe n’ibisubizo by’ibisubizo byangirika ku myitwarire yo kwangirika kwa 20MnTiB imbaraga zikomeye zasesenguwe hakoreshejwe ibizamini bya mikorobe, hamwe na microscopique.
Chongqing iherereye mu majyepfo ashyira uburengerazuba bw'Ubushinwa, hejuru y’umugezi wa Yangtze, kandi ifite ikirere cy’imvura giciriritse. Ubushyuhe buri mwaka ni 16-18 ° C, impuzandengo y’umwaka ugereranije ni 70-80%, amasaha y’izuba buri mwaka ni amasaha 1000-1400, naho izuba ni 25-35% gusa.
Raporo zerekeranye n’izuba n’ubushyuhe bw’ibidukikije muri Chongqing kuva mu 2015 kugeza 2018, ubushyuhe buri munsi muri Chongqing buri munsi ya 17 ° C na dogere 23 ° C.Ubushuhe buhebuje ku kiraro c'ikiraro ca Chaotianmen Bridge muri Chongqing burashobora gushika kuri 50 ° C ° C21,22. Kubera iyo mpamvu, ubushyuhe bwo gupima ikizamini cya ruswa bwashyizwe kuri 25 ° C na 50 ° C.
Agaciro pH k'igisubizo cyigana cyigana kigena mu buryo butaziguye ingano ya H +, ariko ntibisobanuye ko uko agaciro ka pH kagabanutse, koroshya byoroshye bibaho.Ingaruka za pH kubisubizo zizatandukana kubikoresho bitandukanye nibisubizo.Kugira ngo wige neza ingaruka zumuti wibisubizo byangirika kumikorere ya ruswa yibikorwa byimbaraga za pH hamwe nubushakashatsi bwimbaraga za pH 5. ing.2010 kugeza 2018.
Uko urwego rwo hejuru rwibisubizo byigana ruswa, niko ibyinshi bya ion mubisubizo byigana ruswa, kandi niko bigira ingaruka kumitungo yibintu.Kugira ngo bige ku ngaruka ziterwa no gukemura ibibazo byatewe no kwangirika kwingutu zikomeye, laboratoire yibihimbano yihutishije ruswa (igisubizo cya ruswa) cyashizwe kumurongo wa mbere. 20 ×) na 200 × umwimerere wigana ruswa yibisubizo (200 ×).
Ibidukikije hamwe nubushyuhe bwa 25 ℃, pH agaciro ka 5.5, hamwe nubushuhe bwumuti wambere wigana ruswa niwo wegereye uburyo nyabwo bwo gukoresha imiterere ya bolts ikomeye cyane kubiraro.Nyamara, kugirango byihutishe inzira yikizamini cya ruswa, ibihe byubushakashatsi hamwe nubushyuhe bwa 25 ° C, pH yibisubizo byubushakashatsi bwakorewe hamwe nubushuhe bwikigereranyo cya pH. iperereza ryangirika ryimikorere ya bolts-imbaraga nyinshi zarakozweho ubushakashatsi, izindi mpamvu ntizahindutse, zakoreshejwe nkurwego rwubushakashatsi bwitsinda rishinzwe kugenzura.
Dukurikije raporo y’ubuziranenge bw’ibidukikije mu mwaka wa 2010-2018 yatanzwe n’ikigo cy’umujyi wa Chongqing cy’ibidukikije n’ibidukikije, ikanerekeza ku bice by’imvura byavuzwe muri Zhang24 hamwe n’ibindi bitabo byavuzwe muri Chongqing, hateguwe igisubizo cy’ikigereranyo cya ruswa gishingiye ku kongera ubukana bwa SO42- cyateguwe.
Umuti wigana ruswa wateguwe nuburyo bwo kuringaniza imiti ya ion ukoresheje reagent zisesenguye hamwe namazi yatoboye. Agaciro pH k'umuti wigana ruswa wahinduwe hamwe na metero ya pH neza, igisubizo cya acide nitricike hamwe na hydroxide ya sodium.
Mu rwego rwo kwigana ikirere cy’ubushuhe muri Chongqing, ibizamini byo gutera umunyu byahinduwe ku buryo bwihariye kandi birategurwa25.Nkuko bigaragara ku gishushanyo cya 1, ibikoresho by’igeragezwa bifite sisitemu ebyiri: sisitemu yo gutera umunyu hamwe na sisitemu yo kumurika. Sisitemu yo gutera umunyu ni umurimo wingenzi wibikoresho byubushakashatsi, bigizwe nigice cyo kugenzura, igice cyo guteramo ibice byinjira mubushuhe bwumubyimba. mu cyumba cy’ibizamini. Igice cyo kugenzura kigizwe na microcomputer, ihuza igice cya spray nigice cyo kwinjiza kugirango igenzure inzira zose zigeragezwa. Sisitemu yo kumurika yashyizwe mu cyumba cyipimisha umunyu kugirango igereranye urumuri rwizuba.
Ingero zo kwangirika kwa Stress munsi yumutwaro uhoraho zatunganijwe hakurikijwe NACETM0177-2005 (Kwipimisha muri Laboratoire ya Sulfide Stress Cracking na Stress Corrosion Cracking Resistance of Metals mu bidukikije bya H2S) .Ikigereranyo cya ruswa yabanje guhanagurwa na acetone hamwe na ultrasonic ya mashini kugira ngo ikureho ibisigazwa byamavuta hanyuma isukure mucyumba cya ove. ikirere cy’ikirere cya Chongqing. Dukurikije ibipimo bisanzwe bya NACETM0177-2005 hamwe n’ikigereranyo cyo gupima umunyu w’umunyu GB / T 10,125-2012, igihe cyo gupima imitwaro ihoraho yo kwangirika muri ubu bushakashatsi cyemejwe ko ari 168 h.
Igishushanyo 1 kirerekana macro- na micro-morphologie yo kwangirika kwubutaka bwimbaraga nyinshi za bolt guhangayikishwa no kwangirika mubihe bitandukanye byangirika.2 na 3.
Imiterere ya Macroscopique ya stress yo kwangirika ingero za 20MnTiB zifite imbaraga nyinshi mumashanyarazi atandukanye yibidukikije: (a) nta ruswa;(b) inshuro 1;(c) 20 ×;(d) 200 ×;(e) pH3.5;(f) pH 7.5;(g) 50 ° C.
Micromorphologie yibicuruzwa byangirika bya 20MnTiB imbaraga-nini cyane mumashanyarazi atandukanye (100 ×): (a) inshuro 1;(b) 20 ×;(c) 200 ×;(d) pH3.5;(e) pH7 .5;(f) 50 ° C.
Birashobora kugaragara ku gishushanyo cya 2a ko ubuso bwikigereranyo cyerekana imbaraga za bolt zitagaragajwe zerekana urumuri rwinshi rutagira ruswa igaragara.Nyamara, ukurikije imiterere yumuti wambere wigana ruswa (Igicapo 2b), ubuso bwikitegererezo bwari butwikiriwe igice cyumucyo kandi cyumutuku utagaragara, kandi uduce tumwe na tumwe twerekana ko twaragaragaye ko twaragaragaye cyane. hejuru yicyitegererezo.Ibikoresho bifite ingaruka nke.Nyamara, ukurikije imiterere ya 20 × yumwimerere wigana ruswa yibisubizo (Igicapo 2c), ubuso bwikigereranyo cyimbaraga zikomeye zapfundikijwe cyane nibicuruzwa byinshi byangirika hamwe nigitigiri gito cyangirika-umutuku.umusaruro, nta cyuma kigaragara cyumusemburo wumusemburo wa hafi. 2d), ubuso bwikitegererezo butwikiriwe rwose nibicuruzwa byangirika, nibicuruzwa byangirika-umukara bigaragara mubice bimwe.
Nkuko pH yagabanutse kugera kuri 3,5 (Igishusho 2e), ibicuruzwa byangirika byamabara yibara ryinshi nibyo hejuru yicyitegererezo, kandi bimwe mubicuruzwa byangirika byari byarashizwemo.
Igishushanyo cya 2g cyerekana ko uko ubushyuhe bwiyongera kugera kuri 50 ° C, ibirimo ibicuruzwa byangirika byijimye-umutuku hejuru yicyitegererezo bigabanuka cyane, mugihe ibicuruzwa byangirika byijimye bitwikiriye hejuru yicyitegererezo ahantu hanini.Ibicuruzwa byangirika birasa neza, kandi ibicuruzwa bimwe na bimwe byirabura birabura.
Nkuko bigaragara ku gishushanyo cya 3, ahantu hatandukanye rushobora kwangirika, ibicuruzwa byangirika hejuru ya 20MnTiB ingero zikomeye za bolt stress ya ruswa ishobora kugaragara ko yangiritse, kandi umubyimba wurwego rwangirika wiyongera hamwe no kwiyongera kwumuti wibisubizo byangirika.Mu miterere yikintu cya mbere cyangiritse gishobora kugabanywa kubice bya ruswa bishobora kugabanywa kubice bya ruswa bishobora kugabanywa kubutaka bwa ruswa. , ariko umubare munini wibice bigaragara;igice cyimbere ni cluster irekuye yibicuruzwa byangirika.Mu miterere ya 20 × umwimerere wigana wibisubizo byiganjemo ruswa (Igishusho 3b), igorofa yangirika hejuru yicyitegererezo irashobora kugabanywamo ibice bitatu: igorofa yo hanze ikwirakwizwa cyane nibicuruzwa byangirika, bidafunguye kandi byoroshye, kandi bidafite imikorere myiza yo kurinda;Igice cyo hagati ni igicuruzwa kimwe cyangirika, ariko hariho ibice bigaragara, kandi ion zangirika zirashobora kunyura mumacenga hanyuma zikangiza substrate;igice cyimbere ni igicuruzwa cyangirika cyibicuruzwa bitavunitse bigaragara, bifite ingaruka nziza zo kurinda kuri substrate.Mu miterere ya 200 × umwimerere wigana wa ruswa wiganjemo ibisubizo (Igishusho 3c), igorofa ryangirika hejuru yicyitegererezo rishobora kugabanywamo ibice bitatu: igice cyo hanze ni igicuruzwa cyoroshye kandi kimwe;igice cyo hagati kigizwe ahanini namababi yamababi kandi ameze nka flake Igorofa yimbere ni igicuruzwa cyangirika cyinshi kitagira ibice bigaragara nu mwobo, bigira ingaruka nziza zo kurinda substrate.
Birashobora kugaragara ku gishushanyo cya 3d ko mubidukikije bigereranywa na pH 3.5, hari umubare munini wibicuruzwa bya flocculent cyangwa urushinge rusa na ruswa hejuru ya 20MnTiB ifite imbaraga zikomeye za bolt.Biravugwa ko ibyo bicuruzwa byangirika ahanini γ-FeOOH kandi umubare muto wa α-FeOOH uhujwe na26.
Birashobora kugaragara ku gishushanyo cya 3f ko iyo ubushyuhe bwiyongereye kugera kuri 50 ° C, nta cyuma kigaragara cy’imbere cy’imbere cyabonetse mu miterere ya ruswa, byerekana ko hari icyuho kiri hagati y’ibice byangirika kuri 50 ° C, bigatuma substrate idapfukiranwa n’ibicuruzwa byangirika.Itanga uburinzi bwiyongera kuri substrate yangirika.
Imiterere yubukorikori bwimbaraga zikomeye munsi yumutwaro uhoraho wangirika mubidukikije bitandukanye byangirika bigaragara mumbonerahamwe 2:
Birashobora kugaragara kuva ku mbonerahamwe ya 2 ko imiterere yubukanishi bwa 20MnTiB ifite imbaraga nyinshi za bolt zigikomeza kuzuza ibisabwa bisanzwe nyuma yumuzingo wumye-wihuta wihutishije ikizamini cya ruswa ahantu hatandukanye hashobora kwangirika, ariko haribintu byangiritse ugereranije nibitagenda neza.urugero.Ku kwibumbira hamwe kwicyitegererezo cya ruswa cyibanze, cyaragabanutse cyane kuri 200. imiterere yubukanishi irasa nubushuhe bwa 20 × na 200 × umwimerere wigana ruswa ya ruswa.Iyo agaciro ka pH k'umuti wigana ruswa wagabanutse kugera kuri 3.5, imbaraga za tensile no kuramba byintangarugero byagabanutse cyane.Iyo ubushyuhe buzamutse bugera kuri 50 ° C, imbaraga za tensile hamwe no kuramba bigabanuka cyane, kandi igipimo cyo kugabanuka kwakarere kiri hafi yagaciro gasanzwe.
Imiterere ya morphologie ya 20MnTiB ifite imbaraga nyinshi za bolt guhangayikishwa no kwangirika kwerekanwa ahantu hatandukanye kwangirika irerekanwa mumashusho ya 4, arizo macro-morphologie yo kuvunika, agace ka fibre hagati yakavunitse, iminwa ya micro-morfologiya yimyenda yimyenda, hamwe nubuso bwikitegererezo.
Imiterere ya macroscopique na microscopique ivunika ya 20MnTiB ingero zikomeye za bolt ingero zitandukanye zigereranywa na ruswa (500 ×): (a) nta ruswa;(b) inshuro 1;(c) 20 ×;(d) 200 ×;(e) pH3.5;(f) pH7.5;(g) 50 ° C.
Birashobora kugaragara ku gishushanyo cya 4 ko kuvunika kwa 20MnTiB imbaraga zikomeye za bolt guhangayikishwa no kwangirika kwerekanwa ahantu hatandukanye bigereranywa na ruswa yerekana kuvunika igikombe-cone.Ugereranije nicyitegererezo kitarangiritse (Igishusho 4a), igice cyo hagati cya fibre ya fibre ni gito., agace k'iminwa nini ni nini.Ibyo byerekana ko imiterere yubukanishi bwibintu byangiritse cyane nyuma yo kwangirika. Hamwe no kwiyongera kwikigereranyo cyigisubizo cyibisubizo byiganjemo ruswa, ibyobo byo mumwanya wa fibre rwagati rwagati byiyongereye, kandi amarira agaragara yagaragaye. bihagije.
Byemejwe kuva ku gishushanyo cya 3d ko hari ibice bigaragara mubice byangirika hejuru yicyitegererezo, bidafite ingaruka nziza zo gukingira kuri matrix.Mubisubizo byigana bya ruswa ya pH 3.5 (Igicapo 4e), hejuru yicyitegererezo cyangiritse cyane, kandi agace ka fibre rwagati ni nto., Hariho umubare munini wamarira adasanzwe adasanzwe hagati yakarere ka fibre.Nukwiyongera kwagaciro ka pH kumuti wigana ruswa, agace k'amarira mukarere ka fibre hagati yakavunitse kagabanuka, umwobo uragabanuka buhoro buhoro, kandi ubujyakuzimu bwawo bugabanuka buhoro buhoro.
Iyo ubushyuhe bwiyongereye kugera kuri 50 ° C (Igicapo 4g), agace k'iminwa kogosha kavunitse k'icyitegererezo nicyo kinini, ibyobo byo mu gace ka fibre rwagati byiyongereye ku buryo bugaragara, kandi ubujyakuzimu bwa rwobo nabwo bwariyongereye, kandi intera iri hagati y’uruhande rw'iminwa y'icyatsi n'ubuso bw'icyitegererezo yariyongereye.Ibicuruzwa byangirika hamwe n’ibyobo byiyongereye, ibyo bikaba byemeza ko kwiyongera kwangirika kwangirika kugaragara kugaragara ku gishushanyo cya 3f.
Agaciro pH k'umuti wangirika bizatera kwangirika kumiterere ya mashini ya 20MnTiB ifite imbaraga nyinshi, ariko ingaruka ntizihambaye.Mu gisubizo cya ruswa ya pH 3.5, umubare munini wibicuruzwa byangiza cyangwa urushinge rusa na ruswa bigabanywa hejuru yicyitegererezo, kandi igorofa ryangirika rifite ibice byinshi bya ruswa hamwe na microscopi yibintu bigaragara. kuvunika by'icyitegererezo.Ibi byerekana ko ubushobozi bw'icyitegererezo bwo kurwanya ihindagurika ku mbaraga zo hanze bugabanuka cyane mu bidukikije bya aside, kandi urugero rwo kwangirika kw'ibintu byiyongera cyane.
Igisubizo cyumwimerere cyigana ruswa nticyagize ingaruka nke kumiterere yubukanishi bwimbaraga zikomeye za bolt, ariko mugihe ubwinshi bwumuti wigana ruswa wiyongereye bwikubye inshuro 20 ugereranije nigisubizo cyambere cyigana ruswa, imiterere yubukorikori bwangiritse yangiritse cyane, kandi habaye ruswa igaragara muri microstructure yamenetse.ibyobo, ibice bya kabiri hamwe nibicuruzwa byinshi byangirika.Iyo kwibumbira hamwe byiganjemo kwangirika kwangirika byikubye inshuro 20 bikubye inshuro 200 byumwimerere wibisubizo byiganjemo ruswa, ingaruka zokwibanda kumitungo yibikoresho byaragabanutse.
Iyo ubushyuhe bwikigereranyo bwikigereranyo ari 25 ℃, imbaraga zumusaruro nimbaraga za tensile zingero za 20MnTiB zifite imbaraga nyinshi za bolt ntizihinduka cyane ugereranije nubushakashatsi butarangiritse.Nyamara, munsi yubushyuhe bwibidukikije bwangirika bwa 50 ° C, imbaraga zingana hamwe no kurambura kwicyitegererezo cyaragabanutse cyane, umunwa wo hagati wagabanutse cyane byiyongereye, ubujyakuzimu bwiyongereye, ibicuruzwa byangirika hamwe n’ibyobo byangirika byiyongereye.Ibi byerekana ko ibidukikije bihuza ibidukikije bigira ingaruka zikomeye kumiterere yubukanishi bwimbaraga zikomeye, bitagaragara mubushyuhe bwicyumba, ariko cyane cyane iyo ubushyuhe bugeze kuri 50 ° C.
Nyuma yikizamini cyihuta cyo mu nzu cyigana ibidukikije byikirere muri Chongqing, imbaraga zingana, imbaraga zumusaruro, kuramba hamwe nibindi bipimo bya 20MnTiB imbaraga zikomeye zagabanutse, kandi ibyangiritse bigaragara ko byabayeho.Kubera ko ibikoresho biri mukibazo, hazabaho imbaraga zikomeye zo kwangirika kwangirika no kugabanuka kwangirika kwinshi kwangirika kwangirika kwangirika kwinshi no kugabanuka kwangirika kwinshi imbaraga zo hanze, kandi byongere impengamiro yo kwangirika.
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