大型铸锻件
大型鑄鍛件
대형주단건
Heavy Casting and Forging
2015年
6期
28-31
,共4页
低倍夹杂%扫描电镜%Al2 O3 夹杂%沉淀脱氧%扩散脱氧
低倍夾雜%掃描電鏡%Al2 O3 夾雜%沉澱脫氧%擴散脫氧
저배협잡%소묘전경%Al2 O3 협잡%침정탈양%확산탈양
macroscopic inclusion%sannning electron microscope%Al2 O3 inclusion%precipitation deoxidation%diffusion deoxidation
采取低倍、高倍检测以及扫描电镜对渗碳齿轮用钢18CrNiMo7－6低倍夹杂缺陷进行成分分析，判定夹杂主要成分是Al2 O3。产生夹杂的原因是较多的脱氧产物没有来得及上浮，形成夹杂物留在钢液中。通过对冶炼过程用铝量分析，在吨钢用铝量一定的前提下，提高沉淀脱氧用铝量，降低扩散脱氧用铝量，可减少夹杂物的产生。
採取低倍、高倍檢測以及掃描電鏡對滲碳齒輪用鋼18CrNiMo7－6低倍夾雜缺陷進行成分分析，判定夾雜主要成分是Al2 O3。產生夾雜的原因是較多的脫氧產物沒有來得及上浮，形成夾雜物留在鋼液中。通過對冶煉過程用鋁量分析，在噸鋼用鋁量一定的前提下，提高沉澱脫氧用鋁量，降低擴散脫氧用鋁量，可減少夾雜物的產生。
채취저배、고배검측이급소묘전경대삼탄치륜용강18CrNiMo7－6저배협잡결함진행성분분석，판정협잡주요성분시Al2 O3。산생협잡적원인시교다적탈양산물몰유래득급상부，형성협잡물류재강액중。통과대야련과정용려량분석，재둔강용려량일정적전제하，제고침정탈양용려량，강저확산탈양용려량，가감소협잡물적산생。
By adopting the macroscopic and microscopic examination and the scanning electron microscope exami -nation, the chemical composition of macroscopic inclusion defects of carburized gear steel 18CrNiMo7-6 has been ana-lyzed.The main component of inclusions has been determined to be Al 2 O3 .The reason for inclusions was that many deoxidization products had no time to go up and turned into the inclusions which left in the molten steel .By analyzing the amount of Al content during the smelting process , under the condition with certain amount of Al content per ton of steel, the appearance of inclusions could be decreased by means of increasing the Al content for precipitation deoxida -tion and reducing the Al content of diffusion deoxidation .
