ZG35Cr24Ni7SiN Centrifugal Cast Pipes: Manu jahpu-Hpaji masa hta n-gun ja ai n-gun ja ai shara ni a matu kaja ai lata la ai lam

ZG35Cr24Ni7SiN Centrifugal Cast Pipes: Manu jahpu-Hpaji masa hta n-gun ja ai n-gun ja ai shara ni a matu kaja ai lata la ai lam
Chemical hpaga lam hta, jak rung ni gaw grai ra kadawn ai masa ni hta-n-gun ja ai nbung laru, nbung n-gun n-gun jat ai, oxidation, sulfidation, hte n-gun ja ai nbung ni hta bungli galaw nga ai. Ndai n hkru n kaja ai makau grup yin ni gaw, katsi ai hpe hkam sharang lu ai arung arai ni a kam hpa mai ai lam, ngang grin ai lam, bungli galaw lu ai lam ni hpe grai ngang kang ai hku ra sharawng ai lam ni hpe tawn da ai. Ndai ahkyak ai daw ni hta, ZG35Cr24Ni7SiN centrifugal cast pipe ni gaw, n-gun ja ai-n-gun ja ai wan n-ga, galaw shapraw ai arung arai ni, hte n-gun ja ai arung arai ni hpe htawt sit na matu ra sharawng ai hparan ladat hku nna dan dawng nga ai.
"Ni7N" ngu nna shamying ai ZG35Cr24Ni7SiN gaw, n-gun ja ai -n-gun ja ai magam bungli a matu kaja dik htum galaw da ai, nickel-hkye la ai austenitic n-gun-hkap la lu ai n-gang re. 2520 (HK40 / 1.4841) zawn re ai htunghking high‐nickel grade ni hte shingdaw yu yang, dai hte maren (sh) grau kaja ai high‐temperature n-gun, thermal shock hpe ninghkap lu ai, hte n-gun n-gun hpe grai shayawm ai hku nna jaw ya lu ai. 900℃hte 1100℃lapran na n-gun ja ai tsi mawan law malawng a matu, ZG35Cr24Ni7SiN gaw bungli galaw ai lam, kam hpa mai ai lam, sut masa lam ni hta kaja dik htum rap ra ai lam hpe jaw ya ai.
Ndai laika buk gaw ZG35Cr24Ni7SiN arung arai madang, tsi mawan n-gun, ahkyak ai atsam marai ni, centrifugal casting a akyu ara ni, laksan jai lang ai lam ni, hte mungkan madang shingdaw ai lam ni hpe hkrak tup tsun dan ai, tsi mawan hpaji ninghkring ni, mari ai hpung ni, hte hkai sun hpareng ni hpe chye na ai hku lata la ai dawdan lam ni hpe galaw lu hkra karum ya ai.

1. Arung arai ni a madang hte tsi mawan ni hpe garan ginhka ai lam

ZG35Cr24Ni7SiN gaw, n-gun ja ai chromium, n-gun n law ai austenitic n-gun hpe hkam sharang lu ai n-gang rai nna, centrifugal n-gang pipe galaw shapraw na matu galaw da ai n-gang rai nga ai. Shi a chemical composition gaw, n-gun ja ai oxidation hpe ninghkap lu ai, sulfidation hpe ninghkap lu ai, structural stability ni a matu hkrak hkrak rap ra ai, manu jahpu n-rawng ai sha, nickel hpe shayawm kau ai.
1.1 Miwa madang
Madang: ZG35Cr24Ni7SiN
Madang: GB/T 8492‐2014 N-gun hpe hkam sharang lu ai n-gang n-gang ni
1.2 Mungkan ting hte maren mara ai tsang ni
ZG35Cr24Ni7SiN gaw mungkan madang kaba ni hta atsawm sha masat da ai bung ai ni hpe lu da ai, mungkan ting na bungli masing ni a matu lamu ga jarit lai nna htuk manu ai lam hte loi ai hku masat da ai lam ni hpe madi shadaw ya ai.

1.3 Hpaji masa (wt%)

Madung lit ni:
Chromium (Cr): N-gun ja ai Cr2O3 oxide film hpe shabyin ya nna, n-gun ja ai Cr2O3 oxide film hpe shabyin ya ai.
Nickel (Ni): Austenite hpe ngang grin shangun ai, ngang kang ai hte nbung n-gun hpe hkam sharang lu ai atsam hpe jat ya ai.
Silicon (Si): Oxide film hpe n-gun ja shangun nna, n-gun ja shangun ai.
Nitrogen (N): Solid‐solution hpe n-gun ja shangun ai, nickel hpe kam hpa ai lam hpe shayawm ya ai, nbung katsi ai shara hta n-gun ja shangun ai.

2. Madung bungli galaw ai atsam marai ni
1050–1100℃hta aten galu bungli galaw na matu ZG35Cr24Ni7SiN centrifugal cast pipe ni hpe engineering galaw da ai rai nna, grai kaja ai jak hte grup yin hpe ninghkap lu ai atsam ni nga ai.
2.1 Katsi ai atsam
Matut manoi daw jau ai lam: 1050–1100 degree
Aten kadun na aten hta grau tsaw ai: 1200℃du hkra
Chemical high‐temperature galaw ai lam law malawng a matu htuk manu ai, dai hta n-gun n-gun garan ai, gasification galaw ai, wan nat ai, n-gun hpe bai lu la ai lam ni lawm ai.
2.2 Hpaji masa (Centrifugal Cast masa)
Tensile n-gun (RT): 500 MPa hta grau ai (sh) maren sha re ai
Yield n-gun (RT): 300 MPa hta grau ai (sh) maren sha re ai
Elongation: 12% hta grau kaba ai (sh) maren sha re
N-gun ja ai n-gun (1000℃): 230 MPa hta grau kaba ai (sh) dai hte maren sha re.
Katsi ai shara hta aten galu hkam sharang ai npu hta grai kaja ai creep hpe ninghkap lu ai hte thermal stability nga ai.
2.3 N-gun n-gun hte n-gun n-gun hpe ninghkap lu ai atsam
Oxidation hpe ninghkap lu ai atsam: 1100℃hta oxidation n law ai , ngang grin ai makawp maga ai oxide layer hte.
Thermal shock hpe ninghkap lu ai atsam: N-gun n rawng ai sha, kalang lang katsi ai/katsi ai (ΔT > 600℃) hpe hkam sharang lu ai-chyahkring hkring galaw ai start‐stop bungli ni a matu grai kaja ai.
Sulfidation & carburization hpe ninghkap lu ai atsam: Sulfur rawng ai wan n-gun hte carburizing nbung ni hpe ninghkap lu ai, dai gaw nhprang wan sau hte wan sau galaw ai lam ni hta law law lang lang lang ai.

3. Centrifugal n-gun dat ai ladat a akyu ara ni
ZG35Cr24Ni7SiN pipe ni hpe lawan ai centrifugal casting hku nna galaw shapraw ai rai nna, dai gaw n-gun n rawng ai nhprang wan n-gun hta grau ahkyak ai akyu ni hpe jaw ya ai:
Dense, pore‐free structure: Centrifugal n-gun (1000–3000×g) gaw nbung hte n san seng ai hpe shapraw kau ya nna, n-gun n rawng ai, n-gun n rawng ai, n-gun rawng ai lam ni hpe shayawm kau ya ai.
Bunghku a galu kaba ai lam hte hkrak ai shadawn shadang ni: Tight tolerances (±0.5 mm) hte loi ai hku jung na matu hte welding galaw na matu grai kaja ai roundness.
Fine grain structure: N-gun ja ai n-gun, n-gun n-gun, n-gun yawm ai prat hpe jat ya ai.
Kata/shinggan maga ni hpe n-gun ja hkra galaw ya ai: Media n-gun n-gun shayawm ya ai, nhpu n-gun shayawm ya ai, n-gun shayawm ya ai majaw, service prat hpe galu shangun ai.

4. Chemical hpaga lam hta jai lang ai lam ni
ZG35Cr24Ni7SiN centrifugal cast pipe ni hpe wan sau, nhprang wan sau, n-gun ja ai tsi, hte grup yin makawp maga ai lam ni hta grai law hkra jai lang nga ai:
Petrochemical: Hkrunlam hkawm ai wan wut ai hka htung ni, reformer radiant hka htung ni, nbung n-gun kaba ai hka htung ni.
Coal Chemical: Gasifier htawt sit ai pipe ni, n-gun n rawng ai nbung laru hka htung ni, nbung laru shang/pru ai pipe ni.
Fine Chemical: Wan wut ai wan wut ai hka htung ni, wan wut ai jak a arung arai ni, nbung n-gun kaba ai reactor kata na arai ni.
Hkringmang daju a grup yin hpe makawp maga ai lam: Flue gas wan nat ai hka htung ni, desulfurization/denitrification n-gun ja ai shara ni hpe galaw ai.
Ndai lang ai lam yawng hta, ZG35Cr24Ni7SiN gaw 2520 (HK40 / 1.4841) hta 15–25% manu n law ai sha kam mai ai bungli hpe jaw ya lu ai.

5. ZG35Cr24Ni7SiN hte . 2520 (HK40 / 1.4841)

1100℃npu na 95% na chemical high‐temperature jai lang ai lam ni a matu, ZG35Cr24Ni7SiN gaw kaja dik ai lata la ai lam-2520 hte maren kam hpa mai ai lam hpe grau shayawm ai manu hte jaw ya ai.
Anhte hpe matut mahkai ga
ZG35Cr24Ni7SiN centrifugal cast pipes hte seng nna ga san san mayu ai rai yang, shing nrai, na a tsi mawan ni hpe n-gun ja ai hku jai lang na matu, laksan hparan ladat ni ra ai rai yang, anhte hpe matut mahkai mai ai:
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