The effects of RE modification on structure and the properties of a new cast hot-work die (CHD) steel were investigated. The grains of the CHD steel are refined by RE modification. With the increase of RE addition, both grain size and inclusion amount are reduced. Appropriate amount of RE results in decrease in inclusion amount and formation of spheroidal inclusions uniformly-distributed in steel, so that the morphology and distribution of inclusions are improved. RE composite modification favors the formation of bainite, austenite and fine lath martensite with dense dislocation. When the residual RE content reaches 0.02%, no obvious changes in strength and hardness are found, while fracture toughness and threshold of fatigue crack growth are increased. The impact toughness, elongation and reduction of cross sectional area are increased by a factor of two, and thermal fatigue resistance is also improved.
参考文献
| [1] | Huang Hongyi.Die-making Technology[M].北京:机械工业出版社,1988:133. |
| [2] | Irwin L;Avnet S.Factors involved in development of cast H-13 die casting dies[J].Modern Casting,1965(01):777. |
| [3] | HazenS.The challenge for precision cast tooling[J].Foundry,1974(01):84. |
| [4] | Wallace D.Cast-to-size tooling comes of age[J].Foundry,1970(11):38. |
| [5] | Jiang Qichuan;Wang Shuqi;Chui Xianghong .Effect of RE on morphology and properties of cast Cr12MoV die steel[J].Journal of the Chinese Rare Earth Society,1996,14(01):43. |
| [6] | 王树奇,姜启川,崔向红,何镇明.稀土对莱氏体钢共晶碳化物粒化的影响[J].中国稀土学报,1998(03):242-246. |
| [7] | Wang Shuqi,Jiang Qichuan,Cui Xianghong,He Zhenming.Effect of RE on Granulation of Eutectic Carbide in Ledeburite Steel[J].中国稀土学报（英文版）,1998(04):290-294. |
| [8] | 陈钟敏.Austenite-bainite Medium Mn Steel with Nodular Carbide Modified by La Compound[J].JOURNAL OF RARE EARTHS,1995(04):277. |
| [9] | Xu Zhenming,Jiang Qichuan,Guan Qingfeng,He Zhenming.Heterogeneous Nuclei of Intergrowth Eutectic in Austenite-Bainite Steel Modified by Ce and Al[J].稀土学报（英文版）,1998(02):128-133. |
| [10] | 许振明.铈、铝变质奥-贝钢中共晶体异质核心研究[J].中国稀土学报,1997(04):334. |
| [11] | 李彦军.铈对M2高速钢凝固组织的作用[J].中国稀土学报,1999(02):149. |
| [12] | LI Yan-Jun,JIANG Qi-chuan,ZHAO Yu-guang,HE Zhen-ming,ZHONG Xue-you.Influence of Cerium on Solidification Microstructure of M2 High Speed Steel[J].稀土学报（英文版）,2000(02):132-135. |
| [13] | Jiang Qichuan;Fang Jianru.Microstructure and properties of a new cast hot-working die steel[A].Paris,2000:8. |
| [14] | Jiang Qichuan;Fang Jianru.Study of a new cast hot-working die steel[A].Beijing:Mechanical Industry Pressin Chinese),2000:368. |
| [15] | 杨庆祥,廖波,姚枚,刘建华,李向利.稀土对60CrMnMo钢奥氏体长大动力学的影响[J].中国稀土学报,1998(03):274-276. |
| [16] | Fang Jianru .Microstructure and properties of a new cast hot work die steel[D].Changchun: Jilin University of Technology (in Chin.),1998. |
| [17] | Lan Jie;He Junjie;Ding Wenjiang .Study of heterogeneous nuclei in cast H13 steel modified by rare earths[J].中国稀土学报,2001,19(02):142. |
| [18] | Wang Gui;Zhou Xinchu;Li Diankai .Effect of RE on quenched microstructure of 35CrMo steel[J].Materials Science and Technology of Weapon(in Chin),2001,24(01):19. |
| [19] | Yu Zongshen;Chu Youyi.Rare Earth in Steel(in Chin.)[M].北京:冶金工业出版社,1982:88. |
| [20] | Roland K .The influence of non-metallic inclusions on the properties of steel[J].Journal of Metals,1969,10:48. |
| [21] | 陈伟,苏勉曾.Effect of Rare Earth Elements on Low Frequency Fatigue of Hot Rolled Steel 60CrMnMo at High Temperature[J].JOURNAL OF RARE EARTHS,1994(01):23. |
| [22] | 杨庆祥,李慧,郭铁波,张兰萍.稀土对9Cr2Mo钢抗淬裂性能的影响[J].中国稀土学报,2000(01):85-87. |
| [23] | Jiang Q C;Fang J R;Guan Q F .Thermomechanical fatigue behavior of Cr-Ni-Mo cast hot work die steel[J].Scripta Materialia,2001,45:199. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%