Ukuthelekiswa kwe-Q245R, i-ASTM A516 ibanga le-70, i-Q345R

Amandla e-ASTM A516 ibakala 70 lingaphezulu kancinane kune-Q245R, Kufuphi kodwa ngezantsi kune-Q345R.

Ininzi i-smelter e-China, khetha i-Q245R njengento yokuvelisa.Okokuqala, i-Q245R ineziphene ezincinci ze-welding kune-Q345R, echongwa ngokubunjwa kweekhemikhali.Ukongeza, i-Q245R ingcono kune-Q345R kwi-hydrogen corrosion resistance.

Ezona zakhi zekhemikhali eziphambili ezichaphazela ukubola kwe-hydrogen sulfide yi-Mn kunye ne-s.Kwinkqubo yokuveliswa kwentsimbi kunye nezixhobo zokuwelda, i-manganese ivelisa amandla aphezulu kunye nokuqina okuphantsi kwe-microstructure ye-martensite / bainite, ebonisa ubunzima obuphezulu kakhulu, obungathandekiyo kakhulu kwisixhobo sokuxhathisa i-hydrogen sulfide corrosion.Ukongezelela, i-non-metallic inclusions ye-manganese sulfide kunye ne-iron sulfide yenziwe kwintsimbi, okubangela ukuba i-microstructure yendawo ikhulule kunye noxinzelelo lwe-corrosion kwindawo emanzi ye-hydrogen sulfide.

Ukwakheka kweMichiza kwiTheyibhile1

Isakhiwo soomatshini seTheyibhile2

Qaphela: I-HIC resistant steel plate (i-hydrogen sulfide corrosion resistant steel plate):

1.Umxholo ophantsi we-P kunye no-S, ukuxhathisa okulungileyo kwi-corrosion emanzi ye-hydrogen sulfide;

2.Uvavanyo lwentsebenzo ye-Hydrogen-induced cracking (HIC), indlela yokuvavanya ngokuhambelana ne-NACE TM0284 standard okanye GB/T 8650;

3.Ukuxhathisa okugqwesileyo kwi-sulfide stress corrosion (SSCC) ukusebenza.