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Sesimba rakachena, simba remhepo rakakura nokukurumidza mumakore achangopfuura. Nekuvandudzwa kwemidziyo yemagetsi emhepo, marata esimbi anoshandiswa ari kuramba achiwedzera kukora, uye mamwe adarika 100mm, izvo zvinoisa mberi zvinodiwa zvewelding. Parizvino, Q355 kana DH36 inoshandiswa zvakanyanya mumidziyo yemagetsi emhepo, uye nzira dzewelding dzinowanzosarudza flux cored waya gasi kudzivirira welding (FCAW) uye submerged arc welding (SAW).
Mukugadzira shongwe yeturbine yemhepo, kutsemuka kwakanaka kunowanzoitika mumutsara wefusion kana kupisa kunokanganisa nzvimbo yenzvimbo mushure mekunama furemu yegonhi, uye kukora kwendiro yesimbi, ndiko kukura kwemaitiro ekutsemuka. Chikonzero chacho chinokonzerwa nehupamhi hwepamusoro hwekushushikana, kupisa kwekushisa, kutevedzana kwewelding, hydrogen aggregation, nezvimwewo, saka inofanirwa kugadziriswa kubva kune dzakawanda zvinongedzo senge welding material, welding sequence, welding tembiricha, process control, nezvimwe.
1, Kusarudzwa kwezvinodyiwa zvewelding
Nekuda kwekuti chikamu chewelding chakanyanya kukosha, zvinodikanwa kuti usarudze zvinhu zvewelding zvine hutsvina hwakaderera, kusimba kwakanaka uye kwakanaka kutsemuka kuramba, senge yedu GFL-71Ni (GB/T10045 T494T1-1 C1 A, AWS A5.20 E71T-1C). -J).
Yakajairika kuita kweGFL-71Ni zvigadzirwa:
● Kunyanya kuderera kwehutsvina hwemukati, P + S ≤0.012% (wt%) inogona kudzorwa.
● Yakanakisa elongation plasticity, elongation mushure mekuzorora≥27%.
● Yakanakisa kukanganisa kuoma, -40 °C kukanganisa kunyura simba ≥ kupfuura 100J.
● Excellent CTOD performance.
● Diffusion hydrogen content H5 kana pasi.
2、 Welding process control
(1) Welding preheating uye inter-channel tembiricha kudzora
Tichitaura kune akakodzera zviyero uye yakazara yapfuura ruzivo, zvinokurudzirwa kusarudza preheating uye yepakati-channel tembiricha:
● 20~38mm gobvu, preheating tembiricha pamusoro 75 °C.
● 38~65mm gobvu, preheating tembiricha pamusoro 100 °C.
● Kupfuura 65mm gobvu, preheating tembiricha kupfuura 125°C.
Munguva yechando, kurasikirwa kwekupisa kunoda kutariswa, saka kunofanirwa kugadziridzwa ne30 ~ 50 ° C pane iyi nheyo.
(2) Iyo workpiece inofanira kuramba ichipisa panguva yekugadzira welding kuchengetedza yakakwana ye-inter-channel tembiricha
● 20 ~ 38mm gobvu, zvinokurudzirwa kudzora tembiricha pakati chiteshi 130 ~ 160 °C.
● 38 ~ 65mm gobvu, zvinokurudzirwa kudzora tembiricha pakati chiteshi 150 ~ 180 °C.
● Kupfuura 65mm gobvu, zvinokurudzirwa kudzora tembiricha pakati pematanho 170 ~ 200 °C.
Chiyereso chekuyeresa tembiricha chakanakisa kushandisa tembiricha yekuyeresa tembiricha, kana chinyoreso chekuyeresa tembiricha.
3, Welding tsanangudzo yekudzora
| Welding waya Diameter | Inokurudzirwa parameters | Kuisa kupisa |
| 1.2 mm | 220-280A/26-30V 300mm/min | 1.1-2.0KJ/mm |
| 1.4 mm | 230-300A/26-32V 300mm/min | 1.1-2.0KJ/mm |
Cherechedzo 1: Yazvino diki inofanirwa kusarudzirwa pasi welding, uye chivharo chekuzadza chinogona kunge chakakura zvakafanira, asi hachifanirwe kudarika kukosha kwakakurudzirwa.
Cherechedzo 2: Upamhi hweimwe weld bead haifaniri kudarika 20mm, uye weld bead inofanira kurongeka maererano nemamiriro chaiwo. Kana groove yakafara, multi-pass welding inofanira kushandiswa, iyo inobatsira kunatsa zviyo.
4. Welding sequence control
Zvakanakisisa kushandisa multi-person symmetrical welding for annular welds, iyo inogona kuderedza zvakanyanya shrinkage stress, uye 4-munhu symmetrical welding iri nani pane 2-munhu symmetrical welding.
5, Kubviswa kweHydrogen pakati pekupisa
Kubviswa kwehaidhirojeni muchikamu chepakati chiyero chinotorwa pakuunganidzwa kwehaidhirojeni inoparadzana mukunama ndiro dzakakora. Tsvagiridzo inoratidza kuti mhedzisiro yacho iri pachena kune makobvu mahwendefa akakura kupfuura 70mm. The operation process ndeiyi:
● Regedza simbi inenge 2/3 yebhidhi rose.
● Dehydrogenation 250-300℃×2 ~ 3h.
● Ramba uchipisa kusvikira wapedza kubvisa haidhirojeni.
● Kana wapedza welding, vhara nedonje rekudzivirira uye utonhorere zvishoma nezvishoma kusvika kune tembiricha.
6. Zvimwe zvinhu zvinoda kugadziriswa
● Mabhero acho anofanira kunge akachena uye akachena.
● Kubhejera kunofanira kudziviswa sezvinobvira. Inokurudzirwa kushandisa yakatwasuka welding bead uye multi-layer multi-pass welding.
● Kureba kwekureba kwezasi welding wire haifaniri kudarika 25mm. Kana iyo groove yakadzika zvakanyanya, ndapota sarudza conical nozzle.
● Pashure pokunge carbon planer yacheneswa, ruvara rwesimbi runofanira kukwenenzverwa rusati rwaramba rwuchipisa.
Tine nhamba yakakura yemuenzaniso wekushandisa we welding consumables inoshandiswa muindasitiri yemagetsi emhepo, tinogamuchirwa kubvunza!
Nguva yekutumira: Nov-24-2022