Pae Kowiri tira 440C
Whakaahuatanga Poto:
Ko te maitai kore waikura 440C he maitai kore waikura martensitic waro-tiketike e mōhiotia ana mō tōna pakeketanga pai rawa atu, tōna ātete ki te kakahu, me te ātete ki te waikura.
Ngā Pae Kowiri tira 440C:
Ka taea te whakapakeke i te maitai kore waikura 440C kia eke ki ngā taumata pakeke teitei, tata ki te 58-60 HRC (tauine pakeke Rockwell). Nō te raupapa 400 o ngā maitai kore waikura, e tohuhia ana e te nui o te ihirangi waro, tata ki te 0.60-1.20%, me te ātete waikura taurite. He tino pai te ātete kakahu, he pai mō ngā tono pēnei i ngā peera, ngā taputapu tapahi, ngā taputapu pokanga, me ngā wāhanga takirere. Ahakoa ehara i te mea he ātete waikura pērā i ngā maitai kore waikura austenitic (hei tauira, 304, 316), he pai te ātete waikura o te 440C i roto i ngā taiao ngawari. He ātete waikura ake i ētahi atu maitai waro-nui nā te mea he nui te chromium. Ka taea te whakamahana i te maitai kore waikura 440C kia eke ki ngā āhuatanga miihini e hiahiatia ana.
Ngā Whakatakotoranga o te Pae 440C:
| Tau | 440A,440B |
| Paerewa | ASTM A276 |
| Mata | kua whakakīia ki te wai wera, kua orohia |
| Hangarau | I hangaia |
| Roa | 1 ki te 6 Mita |
| Momo | Porowhita, Tapawhā, Hex (A/W), Tapawhā hāngai, Pire, Ingot, Hanga, Me ētahi atu |
| Manawanui | ±0.5mm, ±1.0mm, ±2.0mm, ±3.0mm rānei, kia rite ki ngā whakaritenga a ngā kiritaki |
| Rauemi Mata | POSCO, Baosteel, TISCO, Saky Steel, Outokumpu |
Te taumata ōrite o ngā Pae Kowiri tira 440C A276:
| PAEREWA | Nama WERKSTOFF | UNS | JIS |
| SS 440C | 1.4125 | S44004 | SUS 440C |
Te Hanganga Matū o te Pae S44004:
| Tau | C | Mn | P | S | Si | Cr | Mo |
| 440C | 0.95-1.20 | 1.0 | 0.040 | 0.030 | 1.0 | 16.0-18.0 | 0.75 |
Ngā āhuatanga hangarau o te Pae Kowiri tira 440C:
| Momo | Āhua | Whakaoti | Te whānui, te matotoru rānei, inihi [fmm] | Te pakeketanga HBW |
| 440C | A | mutunga-wera, mutunga-mātao | katoa | 269-285 |
Whakamātautau Pae Kowiri tira S44004 UT:
Paerewa Whakamātautau: EN 10308:2001 Kounga akomanga 4
Ngā Āhuatanga me ngā Painga:
•I muri i te maimoatanga wera tika, ka taea e te maitai kore waikura 440C te whakatutuki i te taumata pakeke teitei, i waenga i te 58-60 HRC, kia pai ai mō ngā tono e hiahia ana kia tino pakeke.
•Nā te nui o te waro me ōna āhuatanga pai rawa atu mō te tukatuka wera, he tino ātete te maitai kore waikura 440C ki te kakahu, ā, he pai mō ngā momo mahi pēnei i ngā taputapu tapahi, ngā peera, me ētahi atu.
•Ahakoa kāore i te tino ātete ki te waikura pērā i ngā maitai kore waikura austenitic (hei tauira, 304, 316), he pai tonu te ātete waikura o te maitai kore waikura 440C i roto i ngā taiao e tika ana, nā te nui o te chromium i roto i a ia, e hanga ana i tētahi paparanga mata chromium oxide tiaki.
•Ka taea te mīhini i te maitai kore waikura 440C i raro i ngā āhuatanga tika hei whakatutuki i ngā whakaritenga o ngā wāhanga. Heoi, nā tōna pakeke me tōna kaha, he uaua pea te mīhini, ā, me whai tukanga me ngā taputapu mīhini tika.
•He pai te pumau o te maitai kore waikura 440C i te pāmahana teitei, e mau tonu ana tōna pakeke me te ātete ki te kakahu i raro i ngā āhuatanga pāmahana teitei, e pai ai mō ngā whakamahinga i roto i ngā taiao pāmahana teitei.
•Ka taea te whakarerekē i ngā āhuatanga ā-pūkaha o te maitai kore waikura 440C mā te maimoatanga wera, pērā i te pakeke, te kaha, me te pakari, kia tutuki ai ngā whakaritenga tono motuhake.
He aha i whiriwhiri ai i a mātou?
•Ka taea e koe te tiki i te rauemi tino tika e rite ana ki ō hiahia i te utu iti rawa.
•Kei a mātou anō ngā utu tuku Reworks, FOB, CFR, CIF, me te tatau ki te tatau. Ka tūtohu mātou kia mahi koe i tētahi kirimana utu pai, ā, he tino ohanga tēnei.
•Ka taea te manatoko i ngā rauemi e tukuna ana e mātou, mai i te tiwhikete whakamātautau rauemi mata ki te tauākī whakamutunga mō ngā āhuatanga. (Ka whakaatuhia ngā pūrongo mēnā e hiahiatia ana)
•Ka oati mātou ki te whakautu i roto i ngā haora 24 (i taua haora anō)
•Whakaratohia te pūrongo SGS TUV.
•E tino whakapau kaha ana mātou ki te tautoko i ā mātou kiritaki. Mēnā kāore e taea te whakatutuki i ō hiahia i muri i te tirotiro i ngā kōwhiringa katoa, e kore mātou e tinihanga i a koe mā te whakaputa kupu whakaari teka, ka waihanga hononga pai ki ngā kiritaki.
•Whakarato ratonga kotahi-mutu.
He aha te maitai kore waikura 440C?
He pai te ātete o te maitai kore waikura 440C ki te kakahu me te ātete waikura taurite i roto i ngā taiao ngawari, me te tino pakari. He rite tonu ki te 440B engari he nui ake te ihirangi waro, ka nui ake te pakeke engari he iti ake te ātete waikura ki te 440B. Ka taea e ia te whakatutuki i te pakeke tae atu ki te 60 Rockwell HRC, ā, ka ātete ki te waikura i roto i ngā taiao ā-whare me ngā taiao ahumahi ngawari, me te ātete tino pai ka tutuki i raro i te pāmahana whakamahana tata ki te 400°C. He mea nui te whakarite o te mata mō te ātete waikura pai rawa atu, me tango te unahi, ngā hinu whakahinuhinu, ngā matūriki ke, me ngā paninga. Nā te nui o te ihirangi waro ka taea te miihini rite ki ngā momo maitai tere-teitei kua whakamahanahia.
Taupānga Pae Porowhita Kowiri tira 440C:
E whakamahia whānuitia ana ngā pae porowhita kowiri tira 440C i roto i te hanga maripi, ngā peera, ngā taputapu tapahi me ngā taputapu taputapu, ngā taputapu hauora, ngā wāhanga takirere, me ngā taputapu ahumahi, ā, nā te mea he pakeke rawa, he ātete ki te kakahu, he ātete ki te waikura ngawari, he mea tino pai ēnei mō ngā wāhanga nui e hiahia ana ki te mahi pai me te roa o te mau.
Te Whakarewatanga o te Kowiri tira 440C:
Nā te pakeketanga me te ngāwari o te whakapakeketanga o te hau, he onge te whakarewa i te maitai kore waikura 440C. Heoi, ki te hiahiatia te whakarewa, me whakamahana te rauemi ki te 260°C (500°F) ka mahi i te maimoatanga whakamahana i muri i te whakarewatanga i te 732-760°C (1350-1400°F) mō ngā hāora e 6, ā, muri iho ka whakamatao puhoi i te oumu hei ārai i te pakaru. Hei whakarite i ngā āhuatanga miihini ōrite i roto i te whakarewa me te mea i roto i te konganuku turanga, me whakamahi i ngā mea whakarewa me te hanganga ōrite. Waihoki, ka taea hoki te whakaaro ko AWS E/ER309 te kōwhiringa pai.
Ā mātou Kiritaki
Ngā Urupare mai i ā Mātou Kiritaki
He maha ngā painga nui o ngā tokotoko maitai kore waikura raupapa 400, ā, he mea e pai ana mō ngā mahi maha. Ko ngā tokotoko maitai kore waikura raupapa 400 he ātete pai ki te waikura, ā, he ātete ki te waikura, ki ngā waikawa, ki ngā tote, me ētahi atu matū waikura, he pai mō ngā taiao uaua. He maha ngā wā ka taea te miihini noa i ēnei tokotoko maitai kore waikura, e whakaatu ana i te tino pai o te miihini. Mā tēnei āhuatanga ka ngāwari te tapahi, te hanga, me te tukatuka. He pai te mahi a ngā tokotoko maitai kore waikura raupapa 400 i runga i te kaha me te pakeke, he pai mō ngā mahi e hiahia ana ki te kaha teitei me te ātete ki te kakahu, pērā i te hanga i ngā wāhanga miihini.
Te tākai:
1. He mea nui te tākai, inā koa mō ngā tukunga o tāwāhi e haere ana ngā uta mā roto i ngā huarahi rerekē kia tae atu ki te ūnga whakamutunga, nō reira ka tino aro nui mātou ki te tākai.
2. He maha ngā huarahi e tākai ai a Saky Steel i ā mātou taonga, e ai ki ngā hua. He maha ngā huarahi e tākai ai mātou i ā mātou hua, pērā i,
