1, kev sim tshuaj lom neeg

1. Raws li cov tshuaj lom neeg sib xyaw thiab cov khoom siv kho tshuab ntawm cov yeeb nkab seamless hauv tsev, xws li 10, 15, 20, 25, 30, 35, 40, 45 thiab 50 steel tshuaj lom neeg sib xyaw yuav tsum ua raws li cov kev cai ntawm GB / T699-88. Cov yeeb nkab seamless uas xa tawm yuav tsum raug tshuaj xyuas raws li cov qauv cuam tshuam uas tau teev tseg hauv daim ntawv cog lus. Cov tshuaj lom neeg sib xyaw ntawm 09MnV, 16Mn, 15MNV steel yuav tsum ua raws li cov kev cai ntawm GB1591-79.

2. Saib gb223-84 "Cov Txheej Txheem Tshuaj Xyuas Hlau thiab Alloy" rau cov txheej txheem tshuaj xyuas tshwj xeeb.

3. kev tshuaj xyuas qhov sib txawv raws li GB222-84 "kev tshuaj xyuas tshuaj hlau nrog cov qauv thiab cov khoom tiav lawm cov tshuaj sib txawv".

2, kev xeem kev ua haujlwm ntawm lub cev

1. Raws li kev ua tau zoo ntawm cov yeeb nkab seamless hauv tsev, cov hlau carbon zoo tib yam raws li GB / T700-88 chav kawm A steel manufacturing (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 tseg hauv GB8162-87 lub rooj.

2. Raws li qhov kev sim siab ntawm cov yeeb nkab tsis sib haum xeeb hauv tsev yuav tsum xyuas kom meej tias tus qauv ntawm kev sim siab ntawm dej.

3. Kev tshuaj xyuas kev ua haujlwm ntawm cov yeeb nkab seamless uas xa tuaj yuav tsum tau ua raws li cov qauv tsim nyog uas tau teev tseg hauv daim ntawv cog lus.