Umbhobho we-Structural seamless (GB/T8162-2008) luhlobo lwepayipi yensimbi engenamthungo esetyenziselwa ulwakhiwo jikelele kunye nesakhiwo soomatshini. Umgangatho wombhobho wentsimbi ongenamthungo usebenza kwimibhobho yentsimbi engenamthungo ehambisa ulwelo.

Ukongeza kwi-carbon (C) izinto kunye nomlinganiselo othile we-silicon (Si) (ngokubanzi akukho ngaphezu kwe-0.40%) kunye ne-manganese (Mn) (ngokubanzi akukho ngaphezu kwe-0.80%, phezulu ukuya kwi-1.20%) i-alloy elements ye-deoxidation, i-structural imibhobho yensimbi , ngaphandle kwezinye izinto zokudibanisa (ngaphandle kwezinto eziseleyo).

Imibhobho enjalo yentsimbi yesakhiwo kufuneka iqinisekise zombini ukubunjwa kweekhemikhali kunye neempawu zomatshini. Umxholo wesulfure (S) kunye ne-phosphorus (P) izinto zokungcola zilawulwa ngokubanzi ngaphantsi kwe-0.035%. Ukuba ilawulwa ngaphantsi kwe-0.030%, ibizwa ngokuba yi-high-grade high-quality steel, kwaye "A" kufuneka ifakwe emva kwebanga layo, njenge-20A; ukuba i-P ilawulwa ngaphantsi kwe-0.025% kwaye i-S ingaphantsi kwe-0.020%, ibizwa ngokuba ngumbhobho wentsimbi yesakhiwo esiphezulu esiphezulu, kwaye ibakala layo kufuneka lilandelwe yi-Add "E" ukuhlula. Kwezinye izinto ezishiyekileyo zomxube eziziswe kwimibhobho yentsimbi yolwakhiwo ukusuka kwizinto eziluhlaza, umxholo wechromium (Cr), nickel (Ni), ubhedu (Cu), njl. 0.25%. Amanye amabakala e-manganese (Mn) umxholo afikelela kwi-1.40%, ebizwa ngokuba yintsimbi ye-manganese.

Umahluko phakathi kombhobho wolwakhiwo ongenamthungo kunye nombhobho wolwelo ongenamthungo:

Umahluko ophambili phakathi kwayo kunye nombhobho wensimbi ongenamthungo kukuba umbhobho wensimbi ongenamthungo uphantsi kovavanyo lwe-hydraulic nganye okanye i-ultrasonic, i-eddy yangoku kunye nokuhlolwa kokuvuza kwemagnethi. Ngoko ke, ekukhethweni okusemgangathweni kwemibhobho yentsimbi yoxinzelelo, imibhobho yensimbi engenamanzi ayifanele isetyenziswe. Indlela yokumelwa yombhobho wentsimbi engenamthungo yidayamitha engaphandle, ubukhulu bodonga, kunye nombhobho wentsimbi ongenamthungo ongqindilili osetyenziswa ikakhulu kumatshini, umgodi wamalahle, intsimbi esebenza ngoxinzelelo lwendalo kunye nezinye iinjongo. Izinto eziphathekayo umbhobho wentsimbi eshinyeneyo ingenamthungo yahlulwe yaba 10 #, 20 #, 35 #, 45 #, 16Mn, 27SiMn, 12Cr1MoV, 10CrMo910, 15CrMo, 35CrMo njalo njalo.

I-Structural stainless steel pipeless seamless pipe (GB/T14975-1994) yintsimbi etshisayo (eyongeziweyo, eyandisiweyo) kunye nemibhobho yentsimbi engenamthungo etsalwa ngokubanda (eqengqiwe).

Ngenxa yeenkqubo ezahlukeneyo zokwenziwa kwazo, imibhobho yentsimbi engenamthungo yahlulwe yaba yimibhobho yentsimbi eshushu eqengqelekayo (eyakhutshiweyo) engenamthungo kunye nemibhobho yentsimbi engenamthungo etsalwa ngokubanda (eqengqiwe). Iityhubhu ezibandayo (eziqengqelekayo) zihlulwe zibe ziindidi ezimbini: iibhubhu ezijikelezayo kunye neebhubhu ezikhethekileyo.

Isishwankathelo senkqubo:
Ukuqengqeleka okushushu (umbhobho wentsimbi ongenamthungo okhutshiweyo): umbhobho wetyhubhu engqukuva → ukufudumeza → ukugqobhoza → ukuqengqeleka kwe-three-roller, ukuqengqeleka okuqhubekayo okanye ukukhutshwa → ukususwa kwetyhubhu → ubungakanani (okanye ukucutha ubukhulu) → ukupholisa → ityhubhu yebhiliti → ukolula → Uvavanyo loxinzelelo lwamanzi (okanye ukufumanisa isiphene) → phawula → ugcino.

Umbhobho wentsimbi obandayo ozotyiweyo (oqengqiwe): umbhobho wetyhubhu engqukuva → ukufudumeza → ukugqobhoza → isihloko → ukuqhola → ukuchola → ukufakwa kwe-oyile (iplate yobhedu) → umzobo obandayo ohamba ngeendlela ezininzi (ukuqengqeleka okubandayo) → ibhilethi → unyango lobushushu → ukulungisa → Uvavanyo lwehydraulic (isiphene ubhaqo)→ukuphawula→ugcino.