電渣重熔對42CrMo鋼中夾雜物的影響及CCT曲線研究

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基金項目:

安徽省科技攻關重大項目(1301021008)

Electroslag remelting effect on inclusions in 42CrMo steel and CCT curve study

1. Key Laboratory of Emission Reduction&Resourses Recycling in Metallurgy, Ministry of Education, School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243002, China;
2. School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China;
3. Special Steel Company, Masteel Co. Ltd., Ma'anshan 243001, China

摘要: 采用BX51M型金相顯微鏡和和Image Pro-Plus軟件研究電渣重熔后優化成分的42CrMo鋼中非金屬夾雜物情況,并在Gleeble3000熱模擬機上測定其連續冷卻相轉變(CCT)曲線.研究結果表明:電渣重熔后明顯減少鋼中夾雜物的數目,改善鋼中夾雜物的尺寸,夾雜物去除率達到71.90%;同時根據熱膨脹曲線和金相組織繪制出42CrMo鋼的CCT曲線,冷卻速度較低時組織為鐵素體、珠光體和貝氏體,冷卻速度較大時組織為馬氏體和少量貝氏體.
- 42CrMo /
- 夾雜物去除 /
- 電渣重熔 /
- CCT曲線
Abstract: The effect of electroslag remelting(ESR) on nonmetallic inclusions in an optimal component 42 CrMo steel was studied by BX51 M optical microscopy and Image Pro-Plus software,and the continuous cooling transformation(CCT) curve was measured on a Gleeble3000 thermal simulation machine. These results show that ESR can reduce the number and size of inclusions in steel samples and the inclusions removal ratio reaches 71.90%. The CCT curve of 42 CrMo steel was plotted according to the thermal expansion curve and microstructure. When the cooling rate is lower,the microstructure is ferrite,pearlite and bainite; but when the cooling rate is higher,there are martensite and a small amount of bainite.
- electroslag remelting /
- inclusions removal /
- cooling /
- phase transformation