Bakin Karfe shine takaitaccen bakin karfe da karfe mai jure acid. Karfe wanda ke da juriya ga raunin lalata kafofin watsa labarai kamar iska, tururi da ruwa ko kuma yana da kaddarorin bakin karfe ana kiransa bakin karfe; Karfe da ke da juriyar lalata matsakaicin sinadarai (acid, alkali, gishiri da sauran etching sinadarai) ana kiransa karfen da ke jure acid.
Bakin karfe yana nufin karfen da ke jure rashin raunin kafofin watsa labarai kamar iska, tururi da ruwa da kuma sinadarai masu etching irin su acid, alkali da gishiri, wanda kuma aka sani da bakin karfe. A aikace aikace, karfe mai juriya ga raunin lalata yawanci ana kiransa bakin karfe, yayin da karfe mai juriya ga matsakaicin sinadari ana kiransa karfen juriya. Saboda bambancin sinadaran sinadaran da ke tsakanin su biyun, na farko ba lallai ba ne ya yi juriya ga lalata matsakaicin sinadarai, yayin da na karshen ya zama bakin karfe. Juriya na lalata bakin karfe ya dogara da abubuwan gami da ke cikin karfe.
Gabaɗaya, bisa ga tsarin metallographic, talakawa bakin karafa sun kasu kashi uku: austenitic bakin karfe, ferritic bakin karfe da martensitic bakin karfe. A bisa wadannan uku na asali metallographic Tsarin, dual lokaci karfe, hazo hardening bakin karfe da high gami karfe tare da baƙin ƙarfe abun ciki kasa da 50% da aka samu don takamaiman bukatu da dalilai.
Ya kasu zuwa:
Austenitic bakin karfe
Matrix galibi tsarin austenitic ne (CY Phase) tare da tsari mai siffar cubic crystal, wanda ba shi da magnetic, kuma yana da ƙarfi musamman (kuma yana iya haifar da wasu maganadisu) ta aikin sanyi. Cibiyar Ƙarfe da Ƙarfe ta Amurka ana nuna ta da jerin lambobi 200 da 300, kamar 304.
Ferritic bakin karfe
Matrix galibi tsari ne na ferrite (phase a) tare da tsarin kristal na tsakiya na jiki, wanda yake maganadisu, kuma gabaɗaya ba za a iya taurare ta hanyar maganin zafi ba, amma ana iya ƙarfafa shi ta hanyar aikin sanyi. Cibiyar Iron da Karfe ta Amurka tana da alamar 430 da 446.
Martensitic bakin karfe
Matrix shine tsarin martensitic (cubic tsakiya ko cubic), maganadisu, kuma ana iya daidaita kayan aikin sa ta hanyar magani mai zafi. Cibiyar Iron da Karfe ta Amurka ana nuna su ta lambobi 410, 420, da 440. Martensite yana da tsarin austenitic a babban zafin jiki. Lokacin da aka sanyaya shi zuwa dakin da zafin jiki a daidai lokacin da ya dace, ana iya canza tsarin austenitic zuwa martensite (watau taurare).
Austenitic ferritic (duplex) bakin karfe
Matrix yana da duka austenite da ferrite tsarin matakai biyu, kuma abun ciki na ƙarancin lokaci matrix gabaɗaya ya fi 15%, wanda shine Magnetic kuma ana iya ƙarfafa shi ta hanyar aikin sanyi. 329 shine bakin karfe na duplex na yau da kullun. Idan aka kwatanta da austenitic bakin karfe, dual lokaci karfe yana da mafi girma ƙarfi, da juriya ga intergranular lalata, chloride danniya lalata da pitting lalata an inganta sosai.
Hazo hardening bakin karfe
Bakin ƙarfe wanda matrix ɗin austenitic ne ko martensitic kuma ana iya taurare ta hanyar hazo mai taurin magani. Cibiyar Iron da Karfe ta Amurka tana da lambobi jerin lambobi 600, kamar 630, watau 17-4PH.
Gabaɗaya magana, ban da gami, bakin karfe austenitic yana da kyakkyawan juriya na lalata. Ferritic bakin karfe za a iya amfani da a cikin yanayi tare da low lalata. A cikin yanayi tare da lalata mai laushi, martensitic bakin karfe da hazo hardening bakin karfe za a iya amfani da idan abu da ake bukata don samun babban ƙarfi ko taurin.
Halaye da manufa
Maganin saman
Bambancin kauri
1. Domin a cikin jujjuyawar injin injin ƙarfe na ƙarfe, juzu'in na'urar ta ɗan lalace saboda dumama, wanda ke haifar da ɓacin rai a cikin kauri na birgima. Gabaɗaya, kauri na tsakiya yana da bakin ciki a bangarorin biyu. Lokacin auna kauri na farantin, za a auna sashin tsakiya na kan farantin bisa ga ka'idodin ƙasa.
2. Haƙuri gabaɗaya an raba shi zuwa babban haƙuri da ƙaramin haƙuri bisa ga kasuwa da buƙatun abokin ciniki: misali.
Wani irin bakin karfe ne ba sauki ga tsatsa?
Akwai manyan abubuwa guda uku da suka shafi lalata bakin karfe:
1. Abubuwan da ke cikin abubuwan haɗin gwiwa.
Gabaɗaya magana, ƙarfe mai abun ciki na chromium na 10.5% ba shi da sauƙin tsatsa. Mafi girman abun ciki na chromium da nickel, mafi kyawun juriya na lalata. Alal misali, abun ciki na nickel na kayan 304 ya kamata ya zama 8-10%, kuma abun ciki na chromium ya zama 18-20%. Gabaɗaya, irin wannan bakin karfe ba zai yi tsatsa ba.
2. Tsarin narkewa na masana'anta kuma zai shafi juriyar lalata na bakin karfe.
Manyan shuke-shuken bakin karfe tare da fasaha mai kyau na narkewa, kayan aiki na ci gaba da ci gaba da tsari na iya tabbatar da kula da abubuwan gami, cire ƙazanta da sarrafa zafin jiki na billet, don haka ingancin samfurin yana da ƙarfi kuma abin dogaro, ingancin ciki yana da kyau, kuma yana da kyau. ba sauki ga tsatsa ba. Akasin haka, wasu ƙananan masana'antun ƙarfe suna da baya a cikin kayan aiki da fasaha. Lokacin narkewa, ba za a iya cire ƙazanta ba, kuma samfuran da aka samar za su yi tsatsa ba makawa.
3. Yanayi na waje, bushewa da iska mai kyau ba shi da sauƙi ga tsatsa.
Duk da haka, wuraren da ke da matsanancin zafi na iska, ci gaba da yanayin ruwan sama, ko babban pH a cikin iska suna da wuyar yin tsatsa. 304 bakin karfe zai yi tsatsa idan yanayin da ke kewaye ya yi rauni sosai.
Yadda za a magance tsatsa a kan bakin karfe?
1. Hanyoyin sinadarai
Yi amfani da man goge acid ko fesa don taimakawa sassan da suka lalace don sake yin fim ɗin chromium oxide don dawo da juriyar lalatarsu. Bayan tsaftacewa na acid, don kawar da duk abubuwan da ba su da kyau da kuma ragowar acid, yana da matukar muhimmanci a wanke da kyau tare da ruwa mai tsabta. Bayan duk jiyya, sake gogewa tare da kayan aikin gogewa kuma hatimi tare da kakin zuma mai gogewa. Ga waɗanda ke da ƙananan tsatsa a cikin gida, 1: 1 cakuda man fetur na man fetur kuma za a iya amfani da su don cire tsatsa da tsutsa mai tsabta.
2. Hanyar inji
Tsaftace fashewar fashewar fashewar fashewar fashewar bom da gilashi ko yumbu, nutsewa, gogewa da goge goge. Yana yiwuwa a cire gurɓatar da abubuwan da aka cire a baya, kayan gogewa ko kayan lalacewa ta hanyar inji. Kowane irin gurɓataccen abu, musamman baƙin ƙarfe na waje, na iya zama tushen lalacewa, musamman a cikin yanayi mai ɗanɗano. Sabili da haka, ya kamata a tsabtace farfajiyar da ke da injina a ƙa'ida a ƙarƙashin bushewa. Hanyar inji kawai za a iya amfani dashi don tsaftace farfajiyar, kuma ba zai iya canza juriya na lalata kayan da kanta ba. Sabili da haka, ana ba da shawarar sake gogewa tare da kayan aikin gogewa bayan tsaftacewar injin da hatimi tare da kakin zuma mai gogewa.
Mafi yawan amfani da maki da kaddarorin bakin karfe
1. 304 bakin karfe. Yana daya daga cikin mafi yadu amfani austenitic bakin karfe tare da babban adadin aikace-aikace. Ya dace da masana'anta zane mai zurfi kafa sassa, bututu watsa acid, tasoshin,cnc structural turninig sassa, Jikunan kayan aiki daban-daban, da dai sauransu, da kuma kayan aikin da ba na maganadisu ba da ƙananan zafin jiki da kayan aiki.
2. 304L bakin karfe. Bakin karfe mai ƙarancin ƙarancin carbon austenitic wanda aka haɓaka don magance mummunan yanayin lalata na 304 bakin karfe wanda ya haifar da hazo Cr23C6 a ƙarƙashin wasu yanayi, juriyawar lalatawar tsaka-tsakin sa yana da mahimmanci fiye da 304 bakin karfe. Sai dai ƙananan ƙarfi, sauran kaddarorin iri ɗaya ne da bakin karfe 321. Ana amfani da shi ne don kayan aiki masu juriya da lalata da sassan da ke buƙatar walda amma ba za a iya magance su ba, kuma ana iya amfani da su don kera jikin kayan aiki daban-daban.
3. 304H bakin karfe. Don reshe na ciki na bakin karfe 304, ɓangaren ƙwayar carbon shine 0.04% - 0.10%, kuma babban aikin zafin jiki ya fi 304 bakin karfe.
4. 316 bakin karfe. Bugu da kari na molybdenum a kan tushen 10Cr18Ni12 karfe sa karfe da kyau juriya ga rage matsakaici da pitting lalata. A cikin ruwan teku da sauran kafofin watsa labarai, juriya na lalata ya fi 304 bakin karfe, galibi ana amfani da shi don rarrabuwa da kayan juriya.
5. 316L bakin karfe. Ultra low carbon karfe, tare da mai kyau juriya ga sensitized intergranular lalata, ya dace da masana'anta lokacin farin ciki sashe size waldi sassa da kayan aiki, kamar anti-lalata kayan a petrochemical kayan aiki.
6. 316H bakin karfe. Don reshe na ciki na bakin karfe 316, ɓangaren ƙwayar carbon shine 0.04% - 0.10%, kuma babban aikin zafin jiki ya fi na 316 bakin karfe.
7. 317 bakin karfe. Juriya ga lalata lalata da creep ya fi 316L bakin karfe. Ana amfani da shi don kera kayan aikin petrochemical da Organic acid.
8. 321 bakin karfe. Titanium stabilized austenitic bakin karfe za a iya maye gurbinsu da matsananci-low carbon austenitic bakin karfe saboda inganta intergranular lalata juriya da kyau high zafin jiki inji Properties. Sai dai lokuta na musamman kamar babban zafin jiki ko juriya na lalata hydrogen, gabaɗaya ba a ba da shawarar yin amfani da shi ba.
9. 347 bakin karfe. Niobium ya daidaita austenitic bakin karfe. Ƙarin niobium yana inganta juriya na lalata intergranular. Juriyarsa ta lalata a cikin acid, alkali, gishiri da sauran kafofin watsa labarai masu lalata iri ɗaya ne da 321 bakin karfe. Tare da kyakkyawan aikin walda, ana iya amfani dashi azaman abu mai juriya da lalata da ƙarfe mai jure zafi. An fi amfani dashi a cikin wutar lantarki da filayen petrochemical, kamar yin tasoshin, bututu, masu musayar zafi, shafts, bututun tanderu a cikin tanderun masana'antu, da ma'aunin zafin jiki na tanderun bututu.
10.904L bakin karfe. Super cikakken austenitic bakin karfe babban bakin karfe ne wanda Kamfanin OUTOKUMPU na Finland ya kirkira. Juzu'insa na nickel shine 24% - 26%, kuma juzu'in ƙwayar carbon ɗin bai wuce 0.02%. Yana da kyakkyawan juriya na lalata. Yana da kyakkyawan juriya na lalatawa a cikin acid waɗanda ba oxidizing kamar su sulfuric acid, acetic acid, formic acid da phosphoric acid, kazalika da kyau juriya ga crevice lalata da danniya lalata. Yana da amfani ga nau'o'in sulfuric acid daban-daban da ke ƙasa da 70 ℃, kuma yana da kyakkyawan juriya ga acetic acid na kowane taro da zafin jiki a ƙarƙashin matsa lamba na al'ada da gauraye acid na formic acid da acetic acid. Asalin daidaitaccen ASMESB-625 ya ƙirƙira shi azaman alloy na nickel, kuma sabon ma'aunin ya rarraba shi azaman bakin karfe. A kasar Sin, akwai irin wannan nau'in nau'in karfe 015Cr19Ni26Mo5Cu2. Wasu ƴan masana'antun kayan aikin Turai suna amfani da bakin karfe 904L azaman maɓalli. Misali, bututun aunawa na E+H mass flowmeter yana amfani da bakin karfe 904L, kuma yanayin agogon Rolex shima yana amfani da bakin karfe 904L.
11.440C bakin karfe. Taurin bakin karfe na martensitic, bakin karfe da bakin karfe shine mafi girma, kuma taurin shine HRC57. An yafi amfani don yin nozzles, bearings, bawul muryoyin, bawul kujeru, hannayen riga, bawul mai tushe,cnc machining sassada dai sauransu.
12. 17-4PH bakin karfe. Martensitic hazo hardening bakin karfe, tare da taurin na HRC44, yana da babban ƙarfi, taurin da lalata juriya, kuma ba za a iya amfani da a yanayin zafi sama da 300 ℃. Yana da kyakkyawan juriya na lalata yanayi da diluted acid ko gishiri. Juriyar lalatarsa iri ɗaya ce da bakin karfe 304 da bakin karfe 430. Ana amfani da shi don kera dandamali na teku, injin turbine, muryoyin bawul, kujerun bawul, hannayen riga, bawul mai tushe, da sauransu.
13. 300 Series - Chromium Nickel Austenitic Bakin Karfe
301 - Kyakkyawan ductility, ana amfani da su don gyare-gyaren samfurori. Hakanan za'a iya taurare ta cikin sauri ta hanyar sarrafa injina, tare da kyakkyawan walƙiya. Juriyar lalacewa da ƙarfin gajiya sun fi 304 bakin karfe. 301 bakin karfe yana nuna taurin aiki a bayyane yayin nakasawa, kuma ana amfani dashi a lokuta daban-daban da ke buƙatar babban ƙarfi.
302 - Ainihin, nau'ikan bakin karfe 304 ne tare da babban abun ciki na carbon, wanda zai iya samun ƙarfi mafi girma ta hanyar mirgina sanyi.
302B - bakin karfe ne tare da babban abun ciki na silicon, wanda ke da tsayin daka ga yanayin zafi mai zafi.
303 da 303Se kyauta ne yankan bakin karfe da ke dauke da sulfur da selenium bi da bi, waɗanda ake amfani da su a lokutan da ake buƙatar yanke kyauta da babban sheki. Hakanan ana amfani da 303Se bakin karfe don yin sassan injin da ke buƙatar tashin hankali mai zafi, saboda a cikin irin wannan yanayin, wannan bakin karfe yana da kyakkyawan aiki mai zafi.
304N - bakin karfe ne mai dauke da nitrogen. Ana ƙara Nitrogen don inganta ƙarfin ƙarfe.
305 da 384 - Bakin karfe yana ƙunshe da babban nickel, kuma ƙarfin ƙarfin aikinsa yana da ƙasa, wanda ya dace da lokatai daban-daban tare da manyan buƙatu don yanayin sanyi.
308- Domin yin sandar walda.
Abubuwan da ke cikin nickel da chromium na 309, 310, 314 da 330 bakin karfe suna da girma don haɓaka juriya da iskar oxygen da ƙarfin rarrafe na ƙarfe a yanayin zafi mai girma. Duk da yake 30S5 da 310S bambance-bambancen na 309 da 310 bakin karfe, bambancin shine cewa abun cikin carbon yana da ƙasa, don rage girman carbide da aka haɗe kusa da walda. 330 bakin karfe yana da juriya na musamman na carburizing da juriya na thermal.
Lokacin aikawa: Dec-05-2022