E690钢900度淬火600度回火的断口分析。工艺包括充氢态与未充氢态的:①900度保温30分钟淬火;②900度淬火,600度回火1小时;③900度淬火,600度回火3小时。
Fracture analysis of E690 steel quenched at 900℃ and tempered at 600℃. The process includes the hydrogen-charged state and the uncharged state: ① 900℃ heat preservation for 30 minutes quenching; ② 900℃ quenching, 600℃ tempering for 1 hour; ③ 900℃ quenching, 600℃ tempering for 3 hours.