在奥氏体不锈钢Cr17Mn6Ni4Cu2N铸坯壳层和心部分别制取拉伸试样,并在Thermorestor-W型热/力模拟试验机上进行高温拉伸试验,研究了铸坯壳层和心部的热塑性及对应的微观组织.结果表明:随着试验温度的升高,壳层和心部试样的热塑性均先升后降,在1 250℃时达到最高;壳层的显微组织为细小的树枝晶,热塑性较高,变形时开裂位置位于铁素体树枝晶的枝干处;心部为胞状奥氏体上分布着网状δ铁素体,热塑性较差,变形时易在胞状奥氏体处产生裂纹;在热变形过程中,心部的胞状奥氏体比壳层的树枝晶更易产生裂纹,从而导致心部的热塑性较差.
参考文献
| [1] | C. Hubert;L. Dubar;M. Dubar;A. Dubois .Experimental simulation of strip edge cracking in steel rolling sequences[J].Journal of Materials Processing Technology,2010(12):1587-1597. |
| [2] | 高碳钢连铸板坯高温力学性能[J].北京科技大学学报,2005(05):545-548. |
| [3] | S. Abdul Rajak;N. Venkata Reddy .Prediction of internal defects in plane strain rolling[J].Journal of Materials Processing Technology,2005(3):409-417. |
| [4] | H.S. Di;G.Z. Cui;G.D. Wang .HOT DUCTILITY OF 304HC STAINLESS STEEL AND THE MODEL OF RESISTANCE TO DEFORMATION[J].Acta metallurgica Sinica,2003(2):97-103. |
| [5] | GUO Wei,ZHU Miao-yong.Characteristic Parameters for Dendritic Microstructure of Solidification During Slab Continuous Casting[J].钢铁研究学报（英文版）,2009(01):17-21. |
| [6] | 张有余,马蓉,侯国清,朱亮.Cr17Mn6Ni4Cu2N奥氏体不锈钢连铸坯组织及凝固模式[J].兰州理工大学学报,2009(04):15-18. |
| [7] | Franc Tehovnik;Franc Vodopivec;Ladislav Kosec .HOT DUCTILITY OF AUSTENITE STAINLESS STEEL WITH A SOLIDIFICATION STRUCTURE[J].Materiali in Tehnologije,2006(4):129-137. |
| [8] | Mintz B;Shaker M;Crowther DN .Hot ductility of an austenitic and a ferritic stainless steel[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1997(3):243-249. |
| [9] | 侯国清,朱亮,马蓉,魏鹏.奥氏体不锈钢Cr15Mn9Cu2Ni1N连铸坯壳层的热塑性[J].材料科学与工艺,2011(01):91-94. |
| [10] | 卞华康,卫英慧,王辉绵,侯利锋,王立新,王正国.节镍型奥氏体不锈钢的高温塑性[J].机械工程材料,2012(03):72-75. |
| [11] | 钟政烨,盛光敏.200系奥氏体不锈钢热轧裂纹的产生原因及其工艺改进[J].机械工程材料,2010(04):79-83. |
| [12] | G. Saller;K. Spiradek-Hahn;C. Scheu;H. Clemens .Microstructural evolution of Cr-Mn-N austenitic steels during cold work hardening[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):246-254. |
| [13] | B.R. TZANEVA;L.B. FACHIKOV;R.G. RAICHEFF .Pitting corrosion of Cr-Mn-N steel in sulphuric acid media[J].Journal of Applied Electrochemistry,2006(3):347-353. |
| [14] | J. W. Fu;Y. S. Yang;J. J. Guo .Effect of cooling rate on solidification microstructures in AISI 304 stainless steel[J].Materials Science and Technology,2008(8):941-944. |
| [15] | 梁高飞,朱丽业,王成全,P.Nolli,吴建春,于艳,方园.AISI304不锈钢中δ→γ相变的原位观察[J].金属学报,2007(02):119-124. |
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%