Line Pipes Steels
Zvakanakira: Simba rakakwirira, uremu, uye kugona kuchengetedza zvinhu
Typical application: hombe dhayamita mapaipi ekutakura mafuta uye gasi
Mhedzisiro ye molybdenum: inodzivirira kuumbwa kweperlite mushure mekukunguruka kwekupedzisira, inosimudzira musanganiswa wakanaka wesimba uye kuderera-kusimba kusimba.
Kweanopfuura makore makumi mashanu, nzira ine hupfumi uye inoshanda yekutakura gasi rechisikigo nemafuta asina kuchena pamusoro pemarefu marefu ndeyepombi dzakagadzirwa nesimbi yakakura-dhayamita. Mapaipi makuru aya anosiyana kubva pa20 ″ kusvika 56 ″ (51 cm kusvika 142 cm), asi anowanzo siyana kubva pa24 ″ kusvika 48 ″ (61 cm kusvika 122 cm).
Sezvo kudiwa kwesimba repasi rose kuchiwedzera uye minda mitsva yegasi inowanikwa munzvimbo dziri kuramba dzichioma uye dziri kure, kudiwa kwehukuru hwekufambisa uye kuwedzera kwekuchengetedza kwepombi kuri kutyaira yekupedzisira dhizaini uye mutengo. Hupfumi huri kukura nekukurumidza hwakaita seChina, Brazil neIndia hwakawedzera kudiwa kwepombi.
Kudiwa kwepombi dzakakura-dhayamita kwakapfuura kuwanikwa kunowanikwa mumatanho ekugadzira echinyakare anoshandisa mahwendefa anorema muUOE (U-kuumba O-forming E-kuwedzera) pombi, zvichitungamira kumabhodhoro panguva yekuita. Naizvozvo, kukosha kwehombe-diameter uye yakakura-caliber spiral chubhu inogadzirwa kubva kune inopisa mitsetse yakawedzera zvakanyanya.
Kushandiswa kwe-high-simba low-alloy steel (HSLA) yakasimbiswa muZ1970 nekuiswa kweiyo thermomechanical rolling process, iyo yakabatanidza micro-alloying ne niobium (Nb), vanadium (V). uye/kana titanium (Ti), ichibvumira kushanda kwesimba repamusoro. simbi yakasimba-yakasimba inogona kugadzirwa pasina kudiwa kwekuwedzera kunodhura maitiro ekurapa kupisa. Kazhinji, aya ekutanga HSLA akatevedzana tubular simbi akavakirwa pearlite-ferrite microstructures kugadzira tubular simbi kusvika X65 (minimum goho simba 65 ksi).
Nekufamba kwenguva, kudiwa kwepombi dzesimba repamusoro kwakatungamira mukutsvagisa kwakadzama muma1970 uye kutanga kwema1980 kukudziridza simba reX70 kana kupfuura vachishandisa simbi dhizaini yakaderera kabhoni, mazhinji ayo anoshandisa iyo molybdenum-niobium alloy pfungwa. Nekudaro, nekuunzwa kwehunyanzvi hwekuita tekinoroji senge kukurumidza kutonhora, zvakave zvinogoneka kukudziridza masimba epamusoro neakawanda akaonda alloy dhizaini.
Zvakangodaro, pese pese painokungururuka zvigayo zvisingakwanise kushandisa mareti ekutonhodza anodiwa patafura-yekunze, kana kana asina kana midziyo yekutonhodza inodiwa, mhinduro chete inoshanda ndeye kushandisa zvakasarudzwa zvekuwedzera zvealloying zvinhu kugadzira simbi inodiwa. . Iine X70 yave kuita basa remapurojekiti epombi emazuva ano uye kuwedzera kukurumbira kwepombi yepipepi, kudiwa kwemapuleti egeji anodhura uye anopisa-akatenderedzwa macoil anogadzirwa mune ese maSteckel mill uye akajairwa hot-strip mill yakakura zvakanyanya kupfuura akati wandei apfuura. makore.
Munguva pfupi yapfuura, mapurojekiti makuru ekutanga anoshandisa X80-giredhi zvinhu zvehurefu-refu-dhayamita pombi akaonekwa muChina. Mazhinji ezvigayo zvinopa mapurojekiti aya anoshandisa alloying pfungwa dzinosanganisira molybdenum yekuwedzera zvichienderana nekugadzirwa kwemetallurgical kwakaitwa muma1970s. Molybdenum-based alloy dhizaini yakaratidzawo kukosha kwayo kune yakareruka yepakati-dhayamita tubing. Simba rekutyaira pano rinoshanda pombi yekuisa uye yakakwirira kushanda kuvimbika.
Kubva pakushambadzira, kudzvanywa kwegasi pombi kwakawedzera kubva pa10 kusvika ku120 bar. Nekuvandudzwa kwerudzi rweX120, kudzvanywa kwekushanda kunogona kuwedzera kusvika ku150 bar. Kuwedzera kudzvinyirira kunoda kushandiswa kwepombi dzesimbi dzine madziro akakora uye/kana masimba akakwirira. Sezvo huwandu hwemitengo yezvinhu hunogona kuverengera inopfuura 30% yemitengo yese yepombi yepurojekiti yepamhenderekedzo yegungwa, kuderedza huwandu hwesimbi inoshandiswa kuburikidza nesimba rakakwirira kunogona kukonzera kuchengetedza kwakakosha.