为了提高电镀金刚石工具的质量,采用脉冲电沉积纳米镍作为其胎体材料.在对其显微结构、晶粒尺寸、显微硬度及抗拉强度的测试基础上,确定了制备工具合适的电镀工艺参数.结果表明,在恒定脉冲模式下(脉冲导通时间2 ms,脉冲断开时间45 ms),镀层晶粒尺寸随电流密度的上升而明显下降,硬度与强度则显著上升,当电流密度超过8 A/dm2时,抗拉强度开始急剧下降而硬度保持6 kN/mm2 的高位基本不变,当超过12 A/dm2 时,硬度也开始下降.同时得到最大硬度与强度时材料的晶粒尺寸大约为20 nm,由其制出的工具切割使用寿命比普通Ni-Co胎体材料工具高20.2%.
参考文献
| [1] | Lindsay J H .Canadian company is engineering in innovative materials for the future of metal finishing[J].Plating and Surface Finishing,2004,107:1-3. |
| [2] | Miller P;Gonzahz F .Nanotechnology-from electronics to sunscreen[J].Plating and Surface Finishing,2004,106:1-3. |
| [3] | Editorial .New uses for nano-crystalline nickel[J].Nickel,2004,19:7. |
| [4] | Palumbo G;Gonzalez F;Brennenstuhl A M.In-situ nuclear steam generator repair using electrodeposited nanocrystalline nickel[J].Nano-Structured Materials,1997(09):737-746. |
| [5] | 李超群.电镀金刚石工具胎体材料的选择[J].超硬材料工程,1999(02):19-21. |
| [6] | 李根生,李云东,江辉.新工艺制备电镀金刚石磨头[J].金刚石与磨料磨具工程,2001(01):22-23. |
| [7] | Li Y D;Li G S;Jiang H et al.New type of matrix material for the manufacture of electroplated diamond tools[J].Industrial Diamond Review,2002,62(04):259-262. |
| [8] | 李大佛.低温电镀镍-锰胎体人造金刚石孕镶工具[J].探矿工程-岩土钻掘工程,1980(04):11-14. |
| [9] | 李超群.电镀镍锰胎体金刚石工具的应用[J].超硬材料工程,1998(02):13-15. |
| [10] | 李云东,江辉,秦桂香,王彩霞.Ni-Co-Mn合金镀液中三种离子含量的络合滴定[J].材料保护,2001(03):50-51. |
| [11] | J. Chen;Y.N. Shi;K. Lu .Strain rate sensitivity of a nanocrystalline Cu-Ni-P alloy[J].Journal of Materials Research,2005(11):2955-2959. |
| [12] | Lu L;Sui M L;Lu K .Superplastic extensibility of nanocrystalline copper at room temperature[J].Science,2000,287(07):1463-1466. |
| [13] | El-Sherik A M;Erb U .Synthesis of bulk nanocrystalline nickel by pulsed electrodeposition[J].Journal of Materials Science,1995,30:5743-5749. |
| [14] | D.H. Jeong;U. Erb;K.T. Aust .The relationship between hardness and abrasive wear resistance of electrodeposited nanocrystalline Ni-P coatings[J].Scripta materialia,2003(8):1067-1072. |
| [15] | a.F. Zimmerman;D.g. Clark;K.T. Aust .Pulse electrodeposition of Ni-SiC nanocomposite[J].Materials Letters,2002(1/2):85-90. |
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%