He pai ake te 308, te 309 rānei mō te Kowiri tira ki te Kowiri tira?

Ina tae mai kite whakarewa i te kowiri tira ki te kowiri tira, ko tētahi o ngā pātai e pātaihia ana e ngā miihini me ngā kaihanga ko:
"Me whakamahi ahau i te konganuku whakakī 308, 309 rānei?"

Ko te 308 me te 309 e ruangā rauemi whakakī maitai kore waikura austenitice whakamahia whānuitia ana i roto i te hanga me te whakatika i ngā hanganga maitai kore waikura. Heoi, he rerekē ngā mahi e mahia ana e rātou i runga i tete hanganga o te konganuku turanga, ngā āhuatanga whakarewa, me te taiao ratonga.

I roto i tēnei tuhinga taipitopito,SAKYSTEEL, he kaihanga me te kaweake maitai kore waikura o te ao, e whakamārama ana i tengā rerekētanga i waenga i ngā konganuku whakakī kowiri tira 308 me 309, ō rātou āhuatanga matū me te whakarewa, me tēhea te mea pai ake te mahi mō ngā tono whakarewa mai i te kowiri tira ki te kowiri tira.

1. He Kupu Whakataki ki ngā Rino Kowiri tira 308 me te 309

308 Kowiri tira

308 te maitai kore waikura(UNS S30800) hekoranu chromium-nickel austenitici hangaia mō te whakarewaNgā maitai kore waikura 304 me te 304LKei roto i tēnei te āhua o20% konukōmiumame10% nikara, he tino ātete ki te waikura, he pai hoki te ngāwari ki te whakarewa.

Nā te mea he rite tōna hanganga ki te 304, ko te 308 te whakakīkōwhiringa paerewaina honoa ana te 304 ki te 304, ētahi atu maitai kowiri tira raupapa-300 rānei i ngā taiao kāore i te tino kino.

309 Kowiri tira

309 kowiri tira(UNS S30900) he koranu austenitic chromium-nickel anō hoki, engari kei rototeitei ake te chromium (≈23%)menikara (≈13%)i te 308. Nā tēnei ka nui akeātete ki te waikura, te ngenge wera, me te tauine i ngā pāmahana tiketike.

I whakawhanakehia i te tīmatanga heitaumata ātete wera, e whakamahia ana hoki te 309 heiwhakarewa whakakī whakawhitimō te hono i ngā maitai kore waikura rerekē, me te whakarewa i waenga i te maitai kore waikura me te maitai waro.

2. Te Hanganga Matū

Ko te hanganga matū e whakatau ana i te mahi a ia koranu i te wā e whakarewaina ana, me muri hoki i te whakarewanga.

• Hanganga o te maitai kore waikura 308:

  • Konupora: 19–21%

  • Nikara: 9–11%

  • Waro: ≤0.08%

  • Konupora: ≤2%

  • Hiraka: ≤1%

• Te Hanganga o te Kowiri tira 309:

  • Konupora: 22–24%

  • Nikara: 12–15%

  • Waro: ≤0.08%

  • Konupora: ≤2%

  • Hiraka: ≤1%

Rerekētanga Matua:

309 kuate ihirangi koranu teitei ake, te whakapai ake i te ātete kite wera me te waikuraengari kia paku noa ihoutu nui akeneke atu i te 308.

3. Hanganga Moroiti me ngā Āhuatanga Whakarewa

Ko te 308 me te 309 e ruaausteniticngā maitai kore waikura, ko te tikanga he hanganga tioata tō rātoupūtoru mata-pokapū (FCC). Mā tēnei ka tino pai te ngāwari, te pakari, me te ātete ki te waikura.

Heoi, ko tā rātoute ihirangi ferritehe rerekē i muri i te whakapakeketanga:

• Kei roto i te whakarewa whakarewa 308 te nuinga o te wā3–10% ferrite, e whakaiti ana i te pakaru wera.

• Ko te whakarewa whakarewa 309 he mea peate ihirangi ferrite teitei ake(tae atu ki te 15%), e whakapai ake ana i te ātete ki te pakaru totoka i raro i te wera nui.

Nō reira, he pai ake te 309 mōte whakarewa i ngā wāhanga matotoru ake, i ngā rauemi rānei he nui te wera e whakaurua ana, he āwangawanga te ngatata.

4. Ngā tono whakarewa o te 308

308 whakarewa whakakīko te paerewa ahumahi mō te whakarewangā maitai kowiri tira austeniticpērā i te 304, 304L, me te 301.

Ngā Whakamahinga Noa:

• Whakarewa304/304L ki te 304/304L

• Te hanga ongā tāke, ngā paipa, me ngā wāhanga hanganga

• Ngā taputapu tukatuka kai me te inu

• Ngā tono hoahoanga me ngā tono whakapaipai

He maha ngā wā ka whakamahia te 308L (putanga waro iti) hei ārai ite whakapūtanga o te warowaihame te pupuri i te ātete ki te waikura i roto ingā hononga kua whakarewahiame te kore he maimoatanga wera i muri i te whakarewanga.

Ngā Painga o te 308:

• He tino pai mō te 304 me ngā maitai kore waikura rite

• He pai te āhua o te whakarewa me te ngāwari o te tango i te paru

• Ka mau tonu te ātete ki te waikura i te nuinga o ngā taiao

Ngā Here:

• Kāore i te pai mō te mahi i runga i te pāmahana teitei i runga ake i te 800°C

• Kāore i te pai mō te hono i te maitai kore waikura ki te maitai waro

5. Ngā Whakamahinga Whakarewa o te 309

309 whakarewa whakakīkua hangaia mōte ihirangi koranu teitei akemehototahi whānuineke atu i te 308.

Ngā Whakamahinga Noa:

• Whakarewate maitai kore waikura ki te maitai waro, te maitai koranu iti rānei

• Te hono atungā maitai kore waikura rerekē(hei tauira, 304 ki te 310, 316 ki te 321 rānei)

• Te whakatika i te whakarewa o ngā momo kowiri tira kāore i te mōhiotia

• Ngā wāhanga pāmahana teitei pērā ingā wāhanga oumu, ngā whakawhiti wera, me ngā pūnaha whakaputa hau

Nā te nui ake o te chromium me te nickel i roto i te 309 ka taea e ia temanawanui ki te kore e ōrite te hangangai waenga i ngā koranu rerekē me te kore e ngatata, e waikura rānei.

Ngā Painga o te 309:

• He ātete tino pai ki te waikura me te tauine tae atu ki te 1100°C

• He manawanui nui mō ngā konganuku turanga whakauru, kāore rānei i te mōhiotia

• Te whakaiti i te auau pakaru i te wā e whakarewahia ana te wera nui

Ngā Here:

• He iti ake te utu i te 308

• Mā te hanganga ōrite rawa ka whakaiti i te ngāwari o ngā whakarewanga pepa angiangi

6. Ātete ki te Waikura

He tino pai te ātete ki te waikura o ngā momo e rua, engari ko te taiao ratonga te mea e whakatau ana ko tēhea te mea ka pai ake te mahi.

• 308:Tino pai i roto ingā āhuatanga matū āhuarangi me ngā āhuatanga matū ngawari, he rite ki te kowiri tira 304.

• 309:Hiranga ake i roto ingā taiao whakahāora me ngā taiao pāmahana teitei, e manawanui ana ki te huringa wera me te kore e tauine, e whakawaro rānei.

Mōngā taiao moana, ngā taiao whai rawa i te kōhaita, kāore te 308 me te 309 e rite te mahi ki ngā momo kei roto te molybdenum pērā i te 316, i te 317 rānei.

Heoi, mōngā taputapu wera ahumahi me ngā hononga whakawhiti, e mārama ana he pai ake te 309 i te 308.

7. Ātete ki te pāmahana teitei

Koinei tētahi o ngā rerekētanga nui i waenga i te 308 me te 309.

• 308:Ka pai te mahi tae noa ki870°C (1600°F)i mua i te ngaronga o te kaha me te ātete ki te waikura.

• 309:Ka mau tonu te pono tae noa ki1100°C (2010°F), e pai ai mōngā pūnaha oumu me te putanga hau.

Nō reira, ki te kitea te hononga whakarewa kite whakamahana tonu, te whakamahana hurihuri rānei, Ko te 309 te kōwhiringa pai ake.

8. Ngā Āhuatanga Mīhini

Ngā āhuatanga ā-pūkaha noa mō ngā konganuku whakakī e rua (te āhua o te putunga whakarewa):

• 308:

  • Kaha Kume: ~550 MPa

  • Kaha Hua: ~350 MPa

  • Te roa: 35%

• 309:

  • Kaha Kume: ~620 MPa

  • Kaha Hua: ~420 MPa

  • Te roa: 35%

Whakatau:
He kaha ake ngā whakarewa 309, ā, he ātete ake ki te whakarerekētanga o te pāmahana teitei, ko ngā whakarewa 308 ia he ngāwari ake te whakaoti mō ngā mahi ataahua, hauora rānei.

9. Te Āheinga Whakarewa me te Hanga

Kei a 308 me 309 ngāhe tino pai te whakakoiā, ka taea te whakamahi me ngā tukanga noa katoa —GTAW (TIG), GMAW (MIG), SMAW (Stick), me FCAW (Flux-Cored).

Heoi, whakaarohia ēnei e whai ake nei:

• Whakamahia308Li te wā e whakarewahia ana ngā maitai kore waikura waro-iti hei ārai i te waikura waenga-porotaka.

• Whakamahia309ina honoa ngā konganuku rerekē, ina kore rānei e mōhiotia te hanganga tuturu o te turanga.

Hei karo i te pakaru,whakahaere i te whakauru weramekia mau tonu te pāmahana o te whakawhiti i raro i te 150°C.

10. Te Whakaōrite i ngā Konganuku Turanga

He ture whānui: