Ukuqulunqwa kweekhemikhali

I-Gr.3: Umxholo weCarbon ≤0.19%, umxholo we-silicon 0.18% -0.37%, umxholo we-manganese 0.31% -0.64%, i-phosphorus kunye ne-sulfure umxholo ≤0.025%, kwaye iqulethe i-3.18% -3.82% nickel.

I-Gr.6: Umxholo weCarbon ≤0.30%, umxholo we-silicon ≥0.10%, umxholo we-manganese 0.29% -1.06%, i-phosphorus kunye nomxholo wesulfure Zonke ≤0.025%.

Iimpawu zoomatshini

I-Gr.3: amandla okuqina ≥450MPa, amandla esivuno ≥240MPa, elongation ≥30% longitudinally, ≥20% ngokuguquguqukayo, ubushushu bovavanyo oluphantsi lwempembelelo yi-150 ° F (-100 ° C).

I-Gr.6: amandla okuqina ≥415MPa, amandla esivuno ≥240MPa, i-elongation ≥30% i-longitudinally, ≥16.5% ngokuguquguqukayo, iqondo lokushisa eliphantsi lempembelelo yi-50 ° F (-45 ° C).

Inkqubo yokuvelisa

Ukunyibilikisa: Sebenzisa isithando somlilo sombane okanye isiguquli kunye nezinye izixhobo zokukhupha i-deoxidize, ukususa i-slag kunye ne-alloy yentsimbi etyhidiweyo ukuze ufumane i-Pure etyhidiweyo yentsimbi.

Ukuqengqeleka: Tofa intsimbi etyhidiweyo kwi-tube rolling mill ukuze iqengqeleke, unciphise ngokuthe ngcembe i-diameter yetyhubhu kwaye ufumane ubukhulu bodonga olufunekayo, kwaye kwangaxeshanye, ugudise umphezulu wetyhubhu yentsimbi.

Ukusetyenzwa okubandayo: Ngokusebenza okubandayo okunjengomzobo obandayo okanye ukuqengqeleka okubandayo, ukuchaneka kunye nomgangatho womphezulu wetyhubhu yentsimbi unokuphuculwa ngakumbi.

Ukunyangwa kobushushu: Ngokuqhelekileyo, kunikezelwa kwimeko yesiqhelo okanye i-normalization kunye ne- tempering state ukuphelisa uxinzelelo oluseleyo ngaphakathi kwityhubhu yensimbi kunye nokuphucula ukusebenza kwayo okubanzi.

Indawo yosetyenziso

I-Petrochemical: Isetyenziselwa ukuvelisa imibhobho yenqanawa yoxinzelelo oluphantsi lobushushu kunye nobushushu obuphantsi bemibhobho yokutshintsha ubushushu kwimimandla yepetroleum, ishishini lemichiza, njl.

Irhasi yendalo: Ifanelekile kwimibhobho yokuhambisa igesi yendalo kunye neetanki zokugcina igesi kunye nezinye izixhobo zokuqinisekisa ukusebenza ngokukhuselekileyo kwiindawo ezinobushushu obuphantsi.

Eminye imimandla: Ikwasetyenziselwa amandla, i-aerospace, kunye nokwakhiwa kweenqanawa, njengezona zinto ziphambili zezakhiwo ze-condensers, iibhoyila kunye nezinye izixhobo kwizixhobo zamandla, kunye nezona zinto zibalulekileyo ze-hydraulic systems, iinkqubo zepetroli kunye nezinye izixhobo kwindawo ye-aerospace.

Iinkcukacha kunye nemilinganiselo

Iimpawu eziqhelekileyo kunye nemilinganiselo inoluhlu olubanzi, olufana nobubanzi obungaphandle be-21.3-711mm, ubukhulu bodonga 2-120mm, njl.
Umbhobho wensimbi ongenamthungo we-Gr.6, ngakumbi i-ASTM A333/A333M GR.6 okanye i-SA-333/SA333M GR.6umbhobho wensimbi ongenamthungo ophantsi wobushushu, yinto ebalulekileyo yoshishino, esetyenziswa ngokubanzi kwiimeko ezahlukeneyo ezifuna ukuqina kobushushu obuphantsi kunye namandla aphezulu. Oku kulandelayo yintshayelelo eneenkcukacha zombhobho wentsimbi weGr.6 ongenamthungo:

1. Imigangatho yokuphunyezwa kunye nezixhobo

Imigangatho yokuphunyezwa: Gr.6 umbhobho intsimbi engenamthungo izixhobo ASTM A333/A333M okanye ASME SA-333/SA333M imigangatho, ezikhutshwa yi American Society for Testing and Materials (ASTM) kunye American Society of Mechanical Engineers (ASME) kwaye zisetyenziswa ngokukodwa ukucacisa iimfuno zobugcisa imibhobho yentsimbi ephantsi ingenamthungo kunye nemibhobho yentsimbi enomthungo.

Izinto eziphathekayo: I-Gr.6 i-seamless steel pipe yi-nickel-free low-temperature pipe yensimbi, esebenzisa i-aluminium-deoxidized fine-grained low-temperature toughness steel, eyaziwa ngokuba yi-aluminium-killed steel. Ulwakhiwo lwe-metallographic lugxile kumzimba we-cubic ferrite.

2. Ukuqulunqwa kweekhemikhali

Ukwakhiwa kweekhemikhali zombhobho wensimbi ongenamthungo weGr.6 ubandakanya ikakhulu:

I-Carbon (C): Umxholo uphantsi, ngokuqhelekileyo awudluli kwi-0.30%, onceda ukunciphisa ukunyanzeliswa kwentsimbi.

I-Manganese (Mn): Umxholo uphakathi kwe-0.29% kunye ne-1.06%, enokuphucula amandla kunye nokuqina kwensimbi.

I-Silicon (Si): Umxholo uphakathi kwe-0.10% kunye ne-0.37%, enceda inkqubo ye-deoxidation yensimbi kwaye inokunyusa amandla ensimbi kwinqanaba elithile.

I-Phosphorus (P) kunye nesulfure (S): Njengezinto zokungcola, umxholo wabo ukhawulelwe ngokungqongqo, ngokuqhelekileyo ungadluli kwi-0.025%, kuba umxholo ophezulu we-phosphorus kunye ne-sulfure uya kunciphisa ukuqina kunye ne-weldability yensimbi.

Ezinye izinto ezixutywayo: ezifana ne-chromium (Cr), i-nickel (Ni), i-molybdenum (Mo), njl.

3. Iimpawu zoomatshini

Umbhobho wentsimbi we-Gr.6 ongenamthungo uneempawu ezigqwesileyo zoomatshini, ikakhulu kubandakanya:

Amandla okuqina: Ngokuqhelekileyo phakathi kwe-415 kunye ne-655 MPa, eqinisekisa ukuba umbhobho wensimbi unokugcina ingqibelelo yesakhiwo kunye nokuthintela ukuphuka xa uphantsi koxinzelelo.

Amandla okuvelisa: Ixabiso elincinci li malunga ne-240 MPa (linokufikelela kwakhona ngaphezu kwe-200 MPa), ukwenzela ukuba ayiyi kuvelisa i-deformation egqithisileyo phantsi kwemikhosi ethile yangaphandle.

Ukwandisa: kungabi ngaphantsi kwe-30%, oku kuthetha ukuba umbhobho wensimbi unamandla okuguqula iplastiki kwaye unokuvelisa i-deformation ethile ngaphandle kokuphulwa xa isolulwe ngamandla angaphandle. Oku kubaluleke kakhulu ukuba kusetyenziswe kwiindawo zokushisa eziphantsi, kuba ubushushu obuphantsi bunokwenza izinto zibe brittle, kwaye iplastiki enhle inokunciphisa umngcipheko we-embrittlement enjalo.

Ukuqina kwempembelelo: Kwiqondo lokushisa elichaziweyo elisezantsi (elifana ne-45 ° C), amandla empembelelo kufuneka ahlangabezane neemfuno zamanani athile ngokuqinisekiswa kovavanyo lwempembelelo yeCharpy ukuze kuqinisekiswe ukuba umbhobho wentsimbi awuzukwaphuka phantsi kwempembelelo yobushushu obuphantsi.