为了提高热作模具钢H13的性能,延长模具的使用寿命,本试验将表面机械研磨(SMA)处理与等离子渗硼相结合.通过显微金相技术、扫描电子显微分析技术(SEM)、X射线衍射分析技术(XRD)以及辉光放电发射光谱技术(GDOS)分别对H13钢渗硼后的渗层厚度、表面相组成以及元素逐层分布情况进行了探讨.研究结果表明在650℃×3h等离子渗硼处理后,纳米化表面便有Fe2B相出现,次表面为扩散层,总渗入深度为30μm左右;在700℃×3h条件下,出现了Fe2B和FeB的双相组织.而对于原始表面,在650℃×3h处理后表面没有任何硼化物出现,只产生了一定的扩散层.最终提出了表面纳米化之后实施低温渗硼的新型工艺.
参考文献
| [1] | N Uzunov;R Ivanov .Aluminothermic power boriding of steel[J].Applied Surface Science,2004,225:72-77. |
| [2] | Sen S.;Sen U.;Bindal C.;Ozbek I. .Mechanical behavior of borides formed on borided cold work tool steel[J].Surface & Coatings Technology,2001(2/3):173-177. |
| [3] | Lee SY.;Kim GS.;Kim BS. .Mechanical properties of duplex layer formed on AISI 403 stainless steel by chromizing and boronizing treatment[J].Surface & Coatings Technology,2004(0):178-184. |
| [4] | T Wierzchon;P Bielinski;K Sikorski .Formation and properties of multicomponent and composite borided layers on steel[J].Surface and Coatings Techonology,1995,73:121-124. |
| [5] | Filep E;Farkas S .Kinetics of plasma-assisted boriding[J].Surface & Coatings Technology,2005(1):1-6. |
| [6] | Nam KS.;Lee SR.;Kwon SC.;Lee KH. .A study on plasma-assisted boriding of steels[J].Surface & Coatings Technology,1998(1/3):886-890. |
| [7] | W P Tong;N R Tao;Z B Wang;J.Lu,K.Lu .Nitriding iron at lower temperatures[J].Science,2003,299(01):686-688. |
| [8] | Z.B. Wang;J. Lu;K. Lu .Chromizing behaviors of a low carbon steel processed by means of surface mechanical attrition treatment[J].Acta materialia,2005(7):2081-2089. |
| [9] | 张毅,陈英颖,张志颖.辉光放电光谱仪及其在钢板表面分析中的应用[J].宝钢技术,2001(04):45-47,52. |
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%