利用扫描电镜和能谱分析等检测手段研究了"真空感应+真空自耗重熔"和"电弧炉+VOD+真空自耗重熔"两种工艺冶炼的G50超高强度钢中夹杂物形态和尺寸分布.研究结果表明:"真空感应+真空自耗重熔"冶炼的钢中硫化物夹杂物尺寸较小、平均间距较小,纵横比较大,尤其是细夹杂物较多,相应的细央杂物密集区域较多,而"电弧炉+VOD+真空自耗重熔"冶炼的钢中MnS夹杂物均匀弥散分布,复合夹杂物中Ca含量较高,MnS变形困难,纵横比较小,导致央杂物尺寸与平均间距较大.
参考文献
[1] | Garrison Jr W M.Uhrahigh-Strength Steels for Aerospace Applications[J].Journal of the Minerals,Metals & Materials Society,1990(05):20. |
[2] | Carlson M F;Rao B V N;Thomas G .The Effect of Autenitiz-ing Temperature Upon the Microstructure and Mechanical Properties of Experimental Fe/Cr/C Steels[J].Metallurgical and Materials Transactions,1979,10A(09):1273. |
[3] | Maloney J L;Garrison Jr W M .The Effect of Sulfide Type on the Fracture Behavior of HYl80 Steel[J].ACTA MATERIALIA,2005,53(02):533. |
[4] | Tomta Y .Effect of Morphology of Nonmetallic Inclusions on Fracture Toughness of Quenched and Light-Tempered 0.4 C-Cr-Mo-Ni Steels[J].Zeitschrift fur Metallkunde,1995,86(03):216. |
[5] | Maropoulos S;Ridley N .Inclusions and Fracture Characteris-tics of HSLA Steel Forgings[J].Materials Science and Engineering A,2004,384(1-2):64. |
[6] | Tomta Y .Effect of Sulphide Inclusion Shape on Plane-Strain Frac-ture Toughness(Klc)of Heat Treated Structural Low Alloy Steels[J].Journal of Materials Science,1990,25(03):950. |
[7] | Speich G R;Spitzig W A .Effect of Volume Fraction and Shape of Sulfide Inclusions on Through-Thickness Ductility and Impact Energy of High-Strength 4340 Plate Steels[J].Metallurgical and Materials Transactions,1982,13A(12):2239. |
[8] | Tomita Y .Fracture Toughness of Calcium Modified Ultra-high-Strength 4340 Steel[J].Metallurgical and Materials Transactions,1990,21A(10):2739. |
[9] | Luyckx L;Bell J R;McLean A .Sulfide Shape Control in High Strength Low Alloy Steels[J].Metallurgical and Materials Transactions,1970,1(12):3341. |
[10] | Tomta Y .Effect of Decreased Hot-Rolling Reduction Treat-ment on Fracture Toughness of Low-Alloy Structural Steels[J].Metallurgical and Materials Transactions,1990,21A(09):2555. |
[11] | Tomta Y .Effect of Desulphurization and Calcium Treatments on the Inclusion Morphology of 0.4C-Cr-Mo-Ni Steel[J].Journal of Materials Science,1994,29(12):2873. |
[12] | ASTM E562-2002.ASTM E562-2002.Standard Test Method for Determining Vol-time Fraction by Systematic Manual Point Count[S]. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%