Slag-Steel Reaction and Control of Inclusions in Al Deoxidized Special Steel

推荐语

本书系统研究了炉渣-钢液反应对钢液成分和钢中夹杂物控制的影响规律，著者在国内外率先开展和开发了高碱度高Al₂O₃精炼炉渣，将Al脱氧特殊钢中夹杂物控制为微米尺寸、低熔点、球形夹杂物，能够有效改善特殊钢的强度、韧性与抗疲劳破坏等力学性能。

In present book, control of inclusions in Al deoxidized steel is intensively discussed. The authors want to share with the reader important studies by us in recent years, that is, targeting low melting point inclusions in Al killed special steels. Based on systematical laboratorial study on slag-steel reactions and its influence on the control of inclusions, the authors proposed the high-basicity calcium aluminate refining slag, which is very favorable to target liquid/semi-liquid inclusions. The evolution phenomenon of inclusions from alumina to spinel and finally to low melting point calcium magnesia aluminate were described, and the mechanism was elucidated. Exploring study was also carried out to clarify the influence of refractory materials on the evolution of inclusions. Moreover, based on the understanding of chemical reactions among slag, steel and inclusions, prohibiting the formation of CaO-containing inclusions in steel was also explored.

目录

1 A Brief Review of Inclusions in Al Deoxidized Steel

1.1 Classification of Inclusions

1.2 Fatigue Defects Initiated by Inclusions

1.3 Influence of Refining Slag on Steel Cleanliness and Control of Inclusions

1.4 Control of Calcium Magnesia Aluminate Inclusions in Steel

References

2 Formation of Spinel Inclusions in HSLA Steel Refined by CaO–SiO₂–Al₂O₃–MgO Slag

2.1 Slag-Steel Reaction Experiments in Lab

2.2 Results and Discussion

2.3 Summary

References

3 Formation Thermodynamics of Inclusions in Al Deoxidized Low Alloy Steel

3.1 Fundamental Data Related to Calculation

3.2 Formation Thermodynamics of Inclusions

3.3 Summary

References

4 Slag-Steel Reaction and Control of Low-Melting-Point Inclusions in Al-Deoxidized Steel

4.1 Slag-Steel Reaction Experiments in Lab

4.2 Determination of Slag-Steel Reaction Time

4.3 Control of Inclusions in Steel Refined by High Basicity High Alumina Slag A

4.4 Control of Inclusions in Steel Refined by High Basicity High Alumina Slag B

4.5 Effects of Al₂O₃ Contents in High Basicity High Alumina Slag on the Control of Inclusions

4.6 Summary

5 Formation and Evolution Mechanisms of Inclusions in Steel

5.1 Variations of Inclusions with Reaction Time

5.2 Descriptions on the Evolutions of Inclusions

5.3 Evolution Mechanisms of Inclusions

5.4 Summary

References

6 Influence of Refractory Material on the Formation Low-Melting-Point Inclusions

6.1 Laboratorial Experiments

6.2 Cleanness and Non-metallic Inclusions in Steel

6.3 Summary

References

7 Prevention of CaO-Contained Inclusions in Steel During the Basic Slag Refining

7.1 Considerations on Inclusion Formation Thermodynamics and Design of Experiments

7.2 Experimental Procedures

7.3 Results and Discussions

7.4 Summary

References