工程科学学报
工程科學學報
공정과학학보
Journal of University of Science and Technology Beijing
2015年
9期
1124-1129
,共6页
李康伟%刘建华%周剑波%季益龙%韩志彪%何杨
李康偉%劉建華%週劍波%季益龍%韓誌彪%何楊
리강위%류건화%주검파%계익룡%한지표%하양
炼钢%精炼%气泡%非金属夹杂物%夹杂物去除
煉鋼%精煉%氣泡%非金屬夾雜物%夾雜物去除
련강%정련%기포%비금속협잡물%협잡물거제
steelmaking%refining%bubbles%non-metallic inclusions%inclusions removal
为了进一步完善增氮析氮法生成气泡去除钢液中显微非金属夹杂物技术,研究了真空处理时间、充氮压力、气体类型等因素对钢中全氧和显微非金属夹杂物的影响.结果表明:减压处理过程中,钢液中非金属夹杂物可为过饱和气体氮气形成气泡提供非均相形核核心;增氮析氮法可有效地降低钢中全氧,去除钢中显微非金属夹杂物;真空处理时间越长,钢中全氧和显微非金属夹杂物数量越低,当真空处理时间为30 min时钢中全氧去除率达到了81.6%,而且全氧质量分数最低达到7×10-6.
為瞭進一步完善增氮析氮法生成氣泡去除鋼液中顯微非金屬夾雜物技術,研究瞭真空處理時間、充氮壓力、氣體類型等因素對鋼中全氧和顯微非金屬夾雜物的影響.結果錶明:減壓處理過程中,鋼液中非金屬夾雜物可為過飽和氣體氮氣形成氣泡提供非均相形覈覈心;增氮析氮法可有效地降低鋼中全氧,去除鋼中顯微非金屬夾雜物;真空處理時間越長,鋼中全氧和顯微非金屬夾雜物數量越低,噹真空處理時間為30 min時鋼中全氧去除率達到瞭81.6%,而且全氧質量分數最低達到7×10-6.
위료진일보완선증담석담법생성기포거제강액중현미비금속협잡물기술,연구료진공처리시간、충담압력、기체류형등인소대강중전양화현미비금속협잡물적영향.결과표명:감압처리과정중,강액중비금속협잡물가위과포화기체담기형성기포제공비균상형핵핵심;증담석담법가유효지강저강중전양,거제강중현미비금속협잡물;진공처리시간월장,강중전양화현미비금속협잡물수량월저,당진공처리시간위30 min시강중전양거제솔체도료81.6%,이차전양질량분수최저체도7×10-6.
The effects of vacuum processing time, nitrogen pressure and gas types on the total oxygen and micro non-metallic inclusions in molten steel were investigated to further improve the technology of micro non-metallic inclusion removal from molten steel with gas bubbles generated by the nitrogen absorbing and releasing method. It is found that in the vacuum treatment process, non-metallic inclusions can act as heterogeneous nucleation sites for the evolution of supersaturated nitrogen from molten steel to form bubbles on their surface, the total oxygen decreases, and these micro non-metallic inclusions are effectively removed by the nitrogen absorbing and releasing technology. The longer the vacuum processing time, the lower the content of total oxygen and amount of micro non-metallic inclusions in steel will be, and the removal rate of total oxygen reaches to 81. 6% after the steel is vacuum treated 30 min, with the lowest total oxygen content about 7 × 10 -6 in steel.