Ni ibamu si GB/T9711.1 pipeline, irin pipe iṣẹ awọn ibeere, ni ibamu si awọn ti o yatọ otutu otutu, le ti wa ni pin si awọn wọnyi iru ti tempering:
[1] Iwọn otutu kekere (awọn iwọn 150-250)
Awọn microstructure ti a gba nipasẹ iwọn otutu kekere ti o ni iwọn otutu jẹ tempered martensite.Idi rẹ ni lati dinku aapọn piparẹ ati brittleness ti irin lile lori ipilẹ ti mimu líle giga rẹ ati atako yiya giga, nitorinaa lati yago fun fifọ tabi ibajẹ ti tọjọ lakoko lilo.O jẹ lilo akọkọ fun gbogbo iru awọn irinṣẹ gige erogba giga, awọn irinṣẹ wiwọn, GB / T9711.1 pipeline, irin pipe, awọn bearings ati awọn ẹya carburizing, ati bẹbẹ lọ, líle lẹhin tempering jẹ gbogbogbo HRC58-64.
[2] Iwọn otutu otutu (iwọn 250-500)
Awọn microstructure ti a gba nipasẹ iwọntunwọnsi iwọntunwọnsi jẹ trossite ti o ni iwọn otutu.Idi naa ni lati gba agbara ikore giga, opin rirọ ati lile giga.Nitorina, o ti wa ni o kun lo fun gbogbo iru GB/T9711.1 opo irin paipu ati ki o gbona m itọju, lẹhin tempering líle ni gbogbo HRC35-50.
[3] Iwọn otutu giga (awọn iwọn 500-650)
Awọn microstructure gba nipasẹ ga otutu tempering ti wa ni tempered sortensite.Ni igbagbogbo, itọju ooru ni idapo pẹlu quenching ati tempering ni a npe ni quenching ati tempering.Idi rẹ ni lati gba awọn ohun-ini ẹrọ ti o dara julọ ti agbara, lile, ṣiṣu ati lile.Nitorina, o ti wa ni lilo pupọ ni awọn ọkọ ayọkẹlẹ, GB / T9711.1 paipu irin pipeline, awọn irinṣẹ ẹrọ ati awọn ẹya pataki miiran, gẹgẹbi ọpa asopọ, boluti, jia ati ọpa.Lile lẹhin tempering ni gbogbogbo HB200-330.
Standard
API SPEC 5L - American Petroleum Institute Standard
GB/T9711 -- Iwọn orilẹ-ede ti Ilu China
Nlo
Ti a lo fun atẹgun, omi ati paipu gbigbe epo ni epo ati ile-iṣẹ gaasi adayeba
Ṣiṣejade akọkọ ti awọn onipò paipu irin:
B, X42, X52, X60, X65, X70 L245 L290 L320 L360 L390 L450 L485
Darí-ini
| Standard | Ipele Ọja | Irin ite | Agbara ikore (min), Mpa | Agbara Fifẹ (MPa) |
| API 5L GB/T9711.2 | PSL 1 | A tabi L210 | 210 | 335 |
| B tabi L245 | 245 | 415 | ||
| x42 tabi L290 | 290 | 415 | ||
| X46 tabi L320 | 320 | 435 | ||
| X52 tabi L360 | 360 | 460 | ||
| X56 tabi L390 | 390 | 490 | ||
| X60 tabi L415 | 415 | 520 | ||
| X70 | 483 | 565 | ||
| PSL 2 | BR tabi L245R | 245-450 | 415-760 | |
| X42R tabi L290R | 290-495 | 415-760 | ||
| BN tabi L245N | 245-450 | 415-760 | ||
| X42N tabi L290N | 290-495 | 415-760 | ||
| X46N tabi L320N | 320-525 | 435-760 | ||
| X52N tabi L360N | 360-530 | 460-760 | ||
| X56N tabi L390N | 390-545 | 490-760 | ||
| X60N tabi L415N | 415-565 | 520-760 | ||
| X65N tabi L450N | 425-566 | 525-760 | ||
| X70 tabi L480 | 484-565 | 565-768 | ||
| X80 | 552-690 | 621-827 |
Tabili ti awọn eroja kemikali ni opo gigun ti epo
| Ipele Ọja | Irin ite | Iṣọkan Kemikali,% | ||||||||
| C | Mn | P | S | Ati | IN | Nb | Of | CEpcm | ||
| PSL 1 | B tabi L245 | ≤0.28 | ≤1.20 | ≤0.030 | ≤0.030 | - | - | - | - | - |
| x42 tabi L290 | ≤0.28 | ≤1.30 | ≤0.030 | ≤0.030 | - | - | - | - | - | |
| X46 tabi L320 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | - | |
| X52 tabi L360 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | - | |
| X56 tabi L390 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | - | |
| X60 tabi L415 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | - | |
| X70 | ≤0.28 | ≤1.40 | ≤0.030 | ≤0.030 | - | - | - | - | - | |
| PSL 2 | BR tabi L245R | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | c | c | ≤0.04 | ≤0.25 |
| X42R tabi L290R | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | ≤0.06 | ≤0.05 | ≤0.04 | ≤0.25 | |
| BN tabi L245N | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 | ≤0.40 | c | c | ≤0.04 | ≤0.25 | |
| X42N tabi L290N | ≤0.24 | ≤1.30 | ≤0.025 | ≤0.015 | ≤0.40 | ≤0.06 | ≤0.05 | ≤0.04 | ≤0.25 | |
| X46N tabi L320N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.40 | ≤0.07 | ≤0.05 | ≤0.04 | ≤0.25 | |
| X52N tabi L360N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | ≤0.25 | |
| X56N tabi L390N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | ≤0.25 | |
| X60N tabi L415N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | - | |
| X65N tabi L450N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | - | |
| X70N | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | - | |
| X80 | ≤0.24 | ≤1.40 | ≤0.025 | ≤0.015 | ≤0.45 | ≤0.10 | ≤0.05 | ≤0.04 | ||
Akoko ifiweranṣẹ: Oṣu Karun-23-2022