1, tshuaj muaj pes tsawg leeg kuaj

1.raws li cov tshuaj muaj pes tsawg leeg thiab txhua yam khoom ntawm cov yeeb nkab hauv tsev seamless, xws li 10, 15, 20, 25, 30, 35, 40, 45 thiab 50 steel chemical muaj pes tsawg leeg yuav tsum ua raws li cov kev cai ntawm GB / T699-88.Ntshuam Cov kav dej seamless yuav tsum raug tshuaj xyuas raws li cov qauv tsim nyog tau teev tseg hauv daim ntawv cog lus.Cov tshuaj muaj pes tsawg leeg ntawm 09MnV, 16Mn, 15MNV steel yuav tsum ua raws li cov kev cai ntawm GB1591-79.

2. Xa mus rau gb223-84 "Txoj Kev Tshuaj Ntsuam Xyuas Cov Hlau thiab Alloy" rau cov txheej txheem tshwj xeeb.

3. kev tsom xam ntawm kev sib txawv raws li GB222-84 "steel tshuaj ntsuam xyuas nrog cov qauv thiab cov khoom tiav cov tshuaj muaj pes tsawg leeg sib txawv".

2 、 Kev ntsuas lub cev ua haujlwm

1.raws li kev ua tau zoo ntawm cov khoom siv hauv tsev seamless yeeb nkab, cov pa roj carbon zoo tib yam raws li GB / T700-88 chav kawm A steel raug tsim (tab sis yuav tsum xyuas kom meej tias cov ntsiab lus sulfur tsis tshaj 0.050% thiab cov ntsiab lus phosphorus tsis tshaj 0.045%), nws cov khoom siv kho tshuab yuav tsum ua tau raws li tus nqi teev hauv GB8162-87 lub rooj.

2.raws li kev ntsuas dej siab ntawm cov kav dej hauv tsev seamless yuav tsum xyuas kom meej tus qauv ntawm kev ntsuas dej siab.

3. Kev tshuaj xyuas lub cev ntawm cov yeeb nkab seamless imported yuav tsum tau ua raws li cov qauv tsim nyog tau teev tseg hauv daim ntawv cog lus.