提高和改善高壓氣瓶鋼綜合性能的熱處理工藝研究

Study on Heat Treatment Techniques to Improve Comprehensive Properties of Steel for Hi-pressure Gas Cylinder Manufacture

摘要: 高壓氣瓶鋼在醫(yī)療、航空等領(lǐng)域已獲得廣泛應(yīng)用。在寒冷地區(qū)、海洋及其他特殊環(huán)境,對其低溫沖擊韌性、抗循環(huán)疲勞的性能要求更高。適宜的熱處理工藝能明顯提高高壓氣瓶鋼的綜合性能。通過對比試驗發(fā)現(xiàn),采用860℃淬火+600℃回火或860℃淬火+650℃回火這兩種熱處理工藝,鋼的屈服強(qiáng)度比正火處理的明顯提高,低溫沖擊韌性可提高兩倍以上。

Abstract: The steel for hi-pressure gas cylinder manufacture is widely used in such market places as medical sector and aviation industry. For services in crucial environments like arctic areas, marine and other special areas, higher low-temperature impact toughness and repeated-impact strength are required for the said steel. The comprehensive properties of the hi-pressure gas cylinder steel can be considerably improved by proper heat treatment processes. With relevant contrast tests, it is identified that owing to the two heat treatment processes, i.e., quenching at 860℃ plus tempering at 600℃ and quenching at 860℃ plus tempering at 650℃, the yield strength of the steel is much higher than that resulting from the normalization process, while the low-temperature impact toughness is of least doubled.