Usangotarisa Kabhoni! "Nyika Yechokwadi" yeCEV
Chikanganiso chinowanzoitika muindasitiri yesimbi ndechekuti kushaya kabhoni shoma (C) ndiko kuri nyore kupinza. Funga zvakare.
Munyika yanhasi yemapombi ane goho guru (akadai seX70 kana X80), vagadziri vanowedzera musanganiswa weManganese (Mn), Chromium (Cr), uye Molybdenum (Mo) kuti vasvike pazvinangwa zvesimba. Kunyange zvazvo izvi zvisiri "carbon," zvinoita seizvi panguva yekutonhora kweweld. Zvinoita kuti Heat Affected Zone (HAZ) iite brittle—isina kusimba segirazi kana usingachenjere.
CEV (Kukosha Kwakaenzana neCarbon)ndiyo bhora rako rekristaro. Rinoshandura ma alloys ese iwayo kuita chikamu chimwe chete che "carbon-equivalent". Kana ukakanganisa kuverenga izvi, weld yako inogona kutaridzika zvakanaka nhasi asi inokura.matombo anotonhorapasi pekumanikidzwa mangwana.
Kusarudza Fomura Yakakodzera: IIW vs. Pcm
Saizi imwe chete haikwani zvese. Kusarudza fomura isiriyo ndiko kunogumbura mainjiniya mazhinji.
A. Fomura Yekare: IIW
Shandisa izvi pasimbi dzekabhoni dzakajairwa kana chero simbi ine kabhoni yakawanda.pamusoro pe0.12%Ndiyo mwero wegoridhe wepasi rose wekugadzira simbi dzechinyakare.
B. Mupendero weMazuva Ano: Pcm Fomura
Kune mapaipi ane simba rakawanda, asina kabhoni yakawanda (kazhinjiTMCPKana yagadziriswa neC < 0.08%), fomura yeIIW inogona kufungidzira kuomarara kwakanyanya kwesimbi dzeTMCP dzine kabhoni shoma. Izvi zvichaita kuti upise pombi isingade. Pane kudaro, shandisa Ito-Bessyo Pcmfomura:
Pepa reKubiridzira reWeldability: Nhamba idzi dzinorevei?
Wapedza masvomhu uye wawana mhedzisiro yakaita se0.44%. Zvino chii? Shandisa tafura iyi yekuenzanisa kuti usarudze danho rako rinotevera:
| CEV yakaverengerwa (%) | Kuongororwa kweWeldability | Zvinodiwa zvekupisa |
| ≤0.35 | Zvakanakisa | Kazhinji "hazvina kungwara." Hazvidiwi kuti dzipiswe. |
| 0.36 – 0.40 | Kugona | Kupisa kunokurudzirwa pamapombi ane madziro akakora (>20mm). |
| 0.41 – 0.45 | Zvakanaka | Kupisa kunokurudzirwa pamapombi ane madziro akakora (>20mm). |
| > 0.45 | Murombo | Njodzi huru. PWHT yakasimba uye maerekitirodhi asina hydrogen yakawanda chete. |
Basa Rakaoma & HIC: Nei Miganhu Iri Kuoma
Kana wangotanga kubata nebasa rakaoma—kunyanya mapaipi anotakura H₂S—hurukuro pamusoro peCEV inochinja zvachose. Hazvisisiri zvekungochinjika chete. Iye zvino wava kugadzirisa njodzi dzekukundikana chaiko, uye ndipo pariHIC (Kutsemuka Kunokonzerwa neHydrogen)inova nyaya inonetsa.
Ndipo panova dambudziko guru reCEV.
CEV yakakwirira inowanzoreva kuomarara kwakanyanya mushure mekunamira. Nzvimbo dzakaoma idzodzo dzinoita semisungo. Hydrogen inoungana ipapo nekufamba kwenguva, kumanikidzwa kunowedzera, uye pakupedzisira, unogona kutsemuka mukati—kana kuti mune zvimwe zviitiko, kusviba kubva mukati zvichienda kunze.
Haisi chinhu chauchaona ipapo ipapo, ndosaka chine njodzi.
Ndicho chikonzero nei vatengi vanoshanda pasi peNACE MR0175 vachiwanzova vanhu vanochengetedza mitemo yavo. Mumapurojekiti chaiwo, zvakajairika kuona zvinodiwa zvakaita seizvi:
CEV ≤ 0.43
Kunyangwe kana simbi yacho pachayo ichigona kubvumira kukosha kwakakwirira, vachiri kuidzikisa pasi—kungoramba vari parutivi rwakachengeteka.
Chati yeMapaipi Esimbi Akaenzana neKabhoni
IyoKukosha Kwakaenzana neKabhoni (CEV)Zvinosiyana zvakanyanya pamhando dzakasiyana dzemapaipi esimbi uye magiredhi akajairwa. Kusiyana uku kunokanganisa zvakananga mashandiro emuchina wesimbi uye kunorayira maitiro chaiwo ekunamira anodiwa panzvimbo iyi kuti ive nechokwadi chekuti chimiro chayo chakasimba.
Kuti tinzwisise hukama huripo pakati pekuumbwa kwemakemikari uye kugona kuchinjika, zvakakosha kuongorora kuti zvinhu zvekabhoni ne alloying zvinobatana sei mukati memitemo yakafanana yeindasitiri. Kunyangwe uri kushanda nemitsetse yekutumira ine simba rakawanda kana masisitimu ekuvaka, zviyero izvi zvemakemikari ndiyo nhanho yekutanga yekuchengetedzeka kwepurojekiti.
Tafura yeCell Pipe CEV Reference
Mufananidzo unotevera unoratidza mamakisi akajairika muindasitiri, uchipa mafambiro emakemikari anoshandiswa kuverenga CEV:
| Rudzi rwepombi | Zviri Mukati meKabhoni (C) | Zviri MuManganese (Mn) | Zviri MuChromium (Cr) | Zviri Mukati meMolybdenum (Mo) | Zviri MuNikeli (Ni) | Zviri Mukati meMhangura (Cu) | Yakaenzana neKabhoni (CE) |
| ASTM A53 GR B | 0.26% | 0.90% | 0.30% | 0.10% | 0.40% | 0.20% | 0.55 |
| ASTM A106 GR B | 0.28% | 0.90% | 0.30% | 0.10% | 0.40% | 0.20% | 0.57 |
| API 5L X42 | 0.21% | 1.30% | 0.20% | 0.10% | 0.30% | 0.20% | 0.53 |
| API 5L X52 | 0.22% | 1.20% | 0.20% | 0.10% | 0.30% | 0.20% | 0.5 |
Chidzidzo Chemuenzaniso: Kuverenga Chitupa Chekuyedza cheAPI 5L X52 Mill (MTC)
Ngatitarisei pombi yeX52 isina musono chaiyo. MTC yako inoratidza:
C:0.14% |Mn:1.15% |Cr:0.04% |V:0.02% |Ndi:0.05% |Cu:0.10%
Kushandisa Fomura yeIIW:
Nguva yekutumira: Kurume-04-2026
