Ipayipi le-Structural Seamless (GB/T8162-2008) luhlobo lwepayipi lensimbi elingenamthungo elisetshenziselwa isakhiwo esijwayelekile kanye nesakhiwo somshini.Izinga lepayipi lensimbi engenamthungo lisebenza kumapayipi ensimbi angenamthungo ahambisa uketshezi.

Ngaphezu kwama-elementi e-carbon (C) nenani elithile le-silicon (Si) (ngokuvamile alikho ngaphezu kuka-0.40%) kanye ne-manganese (Mn) (ngokuvamile angabi ngaphezu kuka-0.80%, aphakeme afika ku-1.20%) izakhi ze-alloy ze-deoxidation, izakhiwo amapayipi ensimbi , ngaphandle kwezinye izakhi ze-alloying (ngaphandle kwezakhi ezisele).

Amapayipi ensimbi anjalo esakhiwo kufanele aqinisekise kokubili ukwakheka kwamakhemikhali kanye nezakhiwo zemishini.Okuqukethwe kwezakhi zokungcola zesulfure (S) kanye ne-phosphorus (P) ngokuvamile kulawulwa ngaphansi kuka-0.035%.Uma ilawulwa ngaphansi kwe-0.030%, ibizwa ngokuthi insimbi ephezulu yezinga eliphezulu, futhi "A" kufanele ingezwe ngemuva kwebanga layo, njenge-20A;uma i-P ilawulwa ngaphansi kuka-0.025% futhi u-S ingaphansi kuka-0.020%, ibizwa ngepayipi lensimbi yesakhiwo sekhwalithi ephezulu, futhi ibanga layo kufanele lilandelwe ngokuthi Engeza u-“E” ukuze kuhlukaniswe.Kwezinye izakhi ezisele zokuxuba ezilethwe kumapayipi ensimbi esakhiwo kusuka ezintweni ezingavuthiwe, okuqukethwe kwe-chromium (Cr), nickel (Ni), ithusi (Cu), njll. ngokuvamile kulawulwa ku-Cr≤0.25%, Ni≤0.30%, Cu≤ 0.25%.Amanye amabanga okuqukethwe kwe-manganese (Mn) afinyelela ku-1.40%, okubizwa ngensimbi ye-manganese.

Umehluko phakathi kwepayipi lesakhiwo elingenamthungo kanye nepayipi eliwuketshezi elingenamthungo:

Umehluko omkhulu phakathi kwayo nepayipi lensimbi elingenamthungo ukuthi ipayipi lensimbi eliwuketshezi lingaphansi kokuhlolwa kwe-hydraulic ngayinye noma ukuhlolwa kwe-ultrasonic, i-eddy yamanje kanye ne-magnetic flux yokuvuza.Ngakho-ke, ekukhethweni okujwayelekile kwamapayipi ensimbi epayipi lokucindezela, amapayipi ensimbi angenamthungo akufanele asetshenziswe.Indlela yokumelela ipayipi lensimbi engenamthungo iwububanzi obungaphandle, ukujiya kodonga, kanye nepayipi lensimbi elinezindonga eliqinile lisetshenziselwa ikakhulukazi umshini, imayini yamalahle, insimbi ye-hydraulic, nezinye izinjongo.Impahla yepayipi yensimbi engenasici enogqinsi ihlukaniswe yaba yi-10#, 20#, 35#, 45#, 16Mn, 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo njalonjalo.

Ipayipi elingenamthungo lensimbi engagqwali (GB/T14975-1994) liyipayipi eligoqekayo elishisayo (elinwetshiwe, elinwetshiwe) kanye nelibandayo (eligoqiwe) elingenamthungo.

Ngenxa yezinqubo zawo ezihlukene zokukhiqiza, amapayipi ensimbi angenamthungo ahlukaniswa abe amapayipi ensimbi angenamthungo ashisayo (akhishiwe) kanye namapayipi ensimbi adonswa ngokubanda (agingqelwe) angenamthungo.Amashubhu abandayo adonswe (agoqiwe) ahlukaniswe abe izinhlobo ezimbili: amashubhu ayindilinga namashubhu amise okukhethekile.

Ukubuka konke kokugeleza kwenqubo:
Ukuginqika okushisayo (ipayipi lensimbi elingenamthungo elikhishiwe): ishubhu eliyindilinga billet → ukushisisa → ukubhoboza → ukugoqa kwe-skew yamarola amathathu, ukugoqeka okuqhubekayo noma ukukhishwa → ukususwa kweshubhu → ukusika (noma ukunciphisa ububanzi) → ukupholisa → ishubhu le-billet → ukuqondisa → Ukuhlolwa komfutho wamanzi (noma ukutholwa kwamaphutha) → maka → isitoreji.

Ipayipi lensimbi elibandayo elidonswe (eligoqiwe) elingenamthungo: ishubhu eliyindilinga billet → ukushisisa → ukubhoboza → isihloko → annealing → pickling → ukugcoba (ithusi elicwebezelayo) → umdwebo obandayo onamaphase amaningi (ukugoqeka okubandayo) → billet → ukwelashwa kokushisa → ukuqondisa → Ukuhlolwa kwe-hydraulic (iphutha ukutholwa)→ukumaka→indawo yokugcina izinto.