为了研究含铜超低碳钢等温时效铜析出,对试验钢在950℃固溶,经650℃保温1、20、45h和400～650℃保温1h等温时效后,通过金相、扫描电镜和透射电镜观察及维氏硬度测试揭示等温时效对铜析出的影响规律。试验结果表明随着时效时间的增长,试验钢晶粒尺寸差别不大,但Cu时效析出颗粒的尺寸和形貌存在很大差异,反映在试验钢的平均硬度值发生变化：时效时间为1h时,试验钢硬度值最高,平均硬度值达到189HV;时效时间为20h和45h时硬度值降低,在160HV左右。400～650℃保温1h结果表明随着时效温度增长,试验钢的硬度呈现先上升后下降的趋势。
Cu precipitation of ultra low carbon steels containing Cu during isothermal aging at 650 ℃ +1 h, 20 h,45 h or 400-650 ℃ + 1 h after 950 ℃ solution treatment had been studied for the research of isothermal aging on precipitation of Cu in the steel containing Cu. The influence of aging time on Cu precipitation was investigated by metallography, scanning electron microscope (SEM) and transmission electron microscope (TEM) and hardness tester. The results indicated that the size of grains under different aging time was similar, while the pattern and size of Cu precipitation were different. The changes were made on the hardness of different aging time.. The hardness of 1 h aging was the highest (189 HV), while the hardness of 20 h or 45 h aging were lower (about 160 HV). The results of 400-650 ℃+1 h showed that the hardness increased and then decreased as temperature increased between 400 ℃ and 650 ℃.
参考文献
| [1] | 安治国,任慧平,刘宗昌,王海燕.1.18Cu高纯钢等温时效时富铜相的析出行为[J].特殊钢,2006(02):20-22. |
| [2] | 李闯,王学敏,周桂峰,杨善武,尚成嘉,贺信莱.低碳贝氏体钢中的时效析出行为[J].北京科技大学学报,2006(06):534-538. |
| [3] | 尹桂全,杨才福,吕忆农.超低碳含铜微合金钢中时效析出相的晶体结构[J].材料热处理学报,2010(12):91-96. |
| [4] | 李闯,王学敏,尚成嘉,郑长安,刘学一,贺信莱.形变对铁铜合金时效析出的影响[J].北京科技大学学报,2008(12):1353-1357,1373. |
| [5] | 安治国,刘宗昌,王海燕,任慧平.含铜高纯低碳钢时效过程中微观组织的观察[J].兵器材料科学与工程,2006(02):35-38. |
| [6] | Naoki Maruyama;Masaaki Sugiyama;Takuya Hara;Hiroshi Tamehiro .Precipitation and phase transformation of copper particles in low alloy ferritic and martensitic steels[J].Materials transactions,1999(4):268-277. |
| [7] | Dhua S K;Muker Jee D;Sarma D S .Influence of Tempering on the Microstructure and Mechanical Properties of HSLA- 100 Steel Plates[J].Metallurgical and Materials Transactions,2001,32A:2259. |
| [8] | Ghosh A;Mishra B;Das S et al.Microstructure,Proper- ties,and Age Hardening Behavior of a Thermomechanically Processed Uhralow-Carbon Cu Bearing High-Strength Steel FJ}[J].Metallurgical and Materials Transactions,2005,36A:703. |
| [9] | T.OHGA .Influence of Copper Content of the Base Steel on the Corrosion Behavior of Nickel-coated Steel Sheets[J].ISIJ International,1997(8):815-820. |
| [10] | 王海燕.含铜高纯钢的固溶与时效[M].包头:内蒙古科技大学,2004:6. |
| [11] | Thompson SW.;Tseng CC.;Krauss G. .A new model of interphase precipitation in copper-containing steels[J].Journal of Materials Science Letters,1998(24):2075-2078. |
| [12] | 任慧平 .含铜高纯钢基本强化行为的研究[D].北京:北京科技大学,2001. |
| [13] | 郭凤莲 .含铜高纯钢中铜的沉淀规律的研究[D].内蒙古科技大学,2007. |
| [14] | 刘宗昌,郭凤莲,任慧平,王海燕.Fe-1.55Cu合金的时效硬化[J].热处理技术与装备,2007(02):29-32. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%