STPT 370Ndi mtundu wa JIS G 3456 ya ku Japan yokhazikika pa mapaipi achitsulo cha kaboni, yomwe imagwiritsidwa ntchito pa mapaipi opanikizika m'malo otentha kuposa 350°C. Ikhoza kukhala mapaipi opanda msoko kapena olumikizidwa pogwiritsa ntchito njira yolumikizira magetsi (ERW). Kapangidwe ka makina ka zinthu za STPT 370 ndi mphamvu yocheperako ya 370 MPa ndi mphamvu yocheperako ya 215 MPa.
Ngati mukufuna wopanga ndi wogulitsa mapaipi achitsulo omwe akukwaniritsa muyezo wa JIS G 3456, ndiye kuti ndife ogwirizana nanu omwe mukufuna. Lumikizanani nafe lero ndipo tidzakhala okondwa kukuthandizani!
Yoyenera kukula kwa 10.5 mm - 660.4 mm (6A - 650A) (1/8B - 26B).
A ndi B ndi njira ziwiri zofotokozera m'mimba mwake mwa muyezo wa ku Japan. Makamaka, A ikufanana ndi DN, pomwe B ikufanana ndi NPS.
JIS G 3456 STPT 370 ikhoza kupangidwa pogwiritsa ntchitowopanda msokonjira yopangira kapenakuwotcherera kokana magetsinjira ya (ERW).
Njira yopangira imagwirizananso ndi njira zosiyanasiyana zomalizira kuti zigwirizane ndi malo osiyanasiyana ogwiritsira ntchito.
| Chizindikiro cha giredi | Chizindikiro cha njira yopangira | |
| Njira yopangira mapaipi | Njira yomaliza | |
| JIS G 3456 STPT370 | Wopanda msoko: S | Yomalizidwa ndi Kutentha: H Yomalizidwa ndi ozizira: C |
| Kukana kwamagetsi kolumikizidwa: E Cholukidwa matako: B | Yomalizidwa ndi Kutentha: H Yomalizidwa ndi ozizira: C Monga kukana kwamagetsi kolumikizidwa: G | |
STPT 370 iyenera kukonzedwa ndi kutentha.
1. Chitoliro chachitsulo chopanda msoko chomalizidwa ndi kutentha: Chopangidwacho chingagwiritsidwe ntchito ngati pakufunika;
2. Chitoliro chachitsulo chopanda msoko chomalizidwa ndi ozizira: Kuphimba kapena kuyeretsa kutentha kochepa;
3. Chitoliro chachitsulo cholumikizidwa ndi magetsi cholimba cholimba: Chopangidwacho chingagwiritsidwe ntchito ngati pakufunika;
4. Chitoliro chachitsulo cholimba cholimba chopanda kuzizira cholumikizidwa ndi cholimba cholumikizidwa ndi magetsi: Cholimba chotsika kutentha kapena chokhazikika.
| Chizindikiro cha giredi | C | Si | Mn | P | S |
| JIS G 3456 STPT370 | 0.25% payokha | 0.10 - 0.35% | 0.30 - 0.90% | 0.035% payokha | 0.035% payokha |
Ngati kuli kofunikira, zinthu zina zitha kuwonjezeredwa.
Mphamvu Yolimba, Kupsinjika kwa Kulemera kapena Kutsimikizira, ndi Kutalika
Malo Okhazikika
Yoyenera mapaipi okhala ndi mainchesi akunja opitilira 60.5 mm.
Chitsanzocho chimayikidwa pakati pa nsanja ziwirizo ndipo chimaphwanyika. Pamene mtunda pakati pa mbale ziwirizo wafikaH, palibe ming'alu pamwamba pa chitsanzo cha chitoliro chachitsulo.
H = 1.08t/(0.08+ t/D)
н: mtunda pakati pa ma platens (mm);
t: makulidwe a khoma la chitoliro (mm);
D: m'mimba mwake wakunja kwa chitoliro (mm);
Kupindika
Yoyenera mapaipi achitsulo okhala ndi mainchesi akunja a 60.5 mm kapena kuchepera.
Chitsanzocho chikapindika mozungulira mandrel kufika pa utali wamkati woposa mainchesi 6 akunja kwa chitolirocho, chitsanzocho chimawunikidwa ndipo palibe ming'alu yomwe yapezeka.
| Makulidwe a khoma lodziwika bwino | Nambala ya ndondomeko: Sch | |||||||||
| 10 | 20 | 30 | 40 | 60 | 80 | 100 | 120 | 140 | 160 | |
| Kuthamanga kochepa kwa mayeso a hydraulic, Mpa | 2.0 | 3.5 | 5.0 | 6.0 | 9.0 | 12 | 15 | 18 | 20 | 20 |
Ngati kukula kwa kunja kwa chitoliro chachitsulo ndi makulidwe a khoma si kukula koyenera, njira zotsatirazi zingagwiritsidwe ntchito kudziwa mtundu woyenera wa kalasi:
Choyamba, sankhani giredi yokhazikika ya ndandanda yomwe ili pafupi kwambiri ndi kukula kosakhala kokhazikika; chachiwiri, dziwani giredi yokhazikika powerengera mtengo wa P.
Mu njira zonse ziwiri, mtengo wocheperako uyenera kusankhidwa ngati kalasi yomaliza yofotokozera.
P = 2st/D
P: kuthamanga kwa mayeso (MPa);
t: makulidwe a khoma la chitoliro (mm);
D: m'mimba mwake wakunja kwa chitoliro (mm);
s: 60% ya mtengo wocheperako womwe watchulidwa wa mfundo yophukira kapena kupsinjika kwa umboni;
Njira zodziwika bwino zoyesera zosawononga zimaphatikizapo kuyesa kwa ultrasound (UT) ndi kuyesa kwa eddy current (ET).
Pochita kafukufuku wa ultrasound, tchulani JIS G 0582, ndipo ngati zotsatira za kafukufukuyo zili zofanana kapena zopitirira muyezo wofotokozera wa kalasi ya UD, zimaonedwa kuti zalephera.
Pochita kafukufuku wa eddy current, muyenera kutchula JIS G 0583. Ngati zotsatira za kafukufukuyo zili zofanana kapena zopitirira muyezo wofotokozera wa kalasi ya EY, zimaonedwa kuti sizoyenera.
Miyeso yokhazikika ndi makulidwe a makoma kuyambira 10.5 mm mpaka 660.4 mm zalembedwa mu JIS G 3456, yomwe nditebulo lolemera la chitoliro chachitsulo ndi ndondomeko yofanana Nambala
Ndandanda 10,Ndandanda 20,Ndandanda 30,Ndandanda 40,Ndandanda 60,Ndandanda 80,Ndandanda 100,Ndandanda 120,Ndandanda 140,Ndandanda 160.
Kuyambira pomwe idakhazikitsidwa mu 2014,Chitsulo cha Botopwakhala kampani yotsogola yogulitsa mapaipi achitsulo cha kaboni kumpoto kwa China, yodziwika bwino chifukwa cha ntchito zabwino kwambiri, zinthu zapamwamba, komanso mayankho omveka bwino.
Kampaniyo imapereka mapaipi osiyanasiyana achitsulo cha kaboni ndi zinthu zina zokhudzana nazo, kuphatikizapo mapaipi achitsulo opanda msoko, ERW, LSAW, ndi SSAW, komanso mndandanda wathunthu wa zolumikizira mapaipi ndi ma flange. Zogulitsa zake zapadera zimaphatikizaponso zitsulo zapamwamba kwambiri ndi zitsulo zosapanga dzimbiri za austenitic, zopangidwa kuti zikwaniritse zosowa za mapulojekiti osiyanasiyana a mapaipi.
Chonde musazengereze kulankhula nafe ndipo tidzasangalala kuyankha mafunso anu.
