文章信息/Info

Title:

Study on the Pore Properties of the Powder�睷olled Porous Ti Sheets with Different Powder Sizes

文章編號:

1674-3962(2020)03-0243-05

作者:

李增峰; 談萍; 葛淵; 王利卿; 趙少陽; 沈壘; 殷京甌; 文佳藝

（西北有色金屬研究院 金屬多孔材料國家重點實驗室，陜西 西安 710016）

Author(s):

LI Zengfeng;  TAN Ping;  GE Yuan;  WANG Liqing;  ZHAO Shaoyang;  SHEN Lei;  YIN Jingou;  WEN Jiayi

(State Key Laboratory of Porous Metal Materials, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China)

關鍵詞:

粉末粒度; 粉末軋制; 多孔鈦板; 孔隙度; 最大孔徑; 透氣度

Keywords:

powder size;  powder rolling;  porous Ti sheets;  porosity;  maximum pore size;  gas permeability

分類號:

TF123；TG146.23

DOI:

10.7502/j.issn.1674-3962.201901024

文獻標志碼:

A

摘要:

為滿足濕法冶金、氯堿、水處理、制藥等行業對多孔鈦板過濾元件的需求，以粉末軋制法制備多孔鈦板為出發點，開展了滿足軋制工藝要求的多孔鈦板粉末軋制、燒結、性能測試等研究。通過對不同性能的鈦粉進行粉末軋制、真空燒結，制得了寬度為420 mm、厚度不同、組織均勻的多孔鈦板，研究了不同粉末性能對其孔隙度、最大孔徑和透氣度的影響。結果表明：隨著粉末粒度的減小，多孔鈦板的密度有所增大，孔隙度、最大孔徑和透氣度逐漸減小。其中，多孔鈦板最大孔徑和透氣度的變化規律與模壓多孔材料的相同。在追求孔隙度最大化時，以最小的軋制壓力軋制成型多孔鈦板，粉末粒度越大，其厚度越大。當粉末粒度相同時，多孔鈦板厚度越大，其內部孔道路徑越長，孔結構越復雜，氣體在透過多孔結構通道時所消耗的能量也越多，透氣度則越低。

Abstract:

The porous titanium (Ti) sheets as filter elements exhibit a great demand in the field of hydro�瞞etallurgy process, chlor�瞐lkail industry, water treatment, pharmaceutical industry, etc. For the powder�瞨olled porous Ti sheets, systematical studies had been carried out on rolling, sintering process and properties of porous Ti sheets. In this work, porous Ti sheets with the width of 420 mm, different thicknesses and uniform microstructure were fabricated by powder rolling combining with vacuum sintering. The effect of powder properties on the performance of powder�瞨olled porous Ti sheets, including porosity, maximum pore size, gas permeability, had been investigated. The results indicate that with the decrease of powder size, the density of porous Ti sheet increases, while its porosity, maximum pore size and gas permeability decrease. Moreover, the variation rule of maximum pore size and gas permeability to porous Ti steel is similar to that of molded porous materials. Therefore, in order to obtain the maximum porosity, porous Ti sheets should be rolled with the minimum rolling force. At that time, the coarser powders are, the thicker porous Ti sheets are. With the same powder size, the internal pore path of porous Ti sheet became longer and more complicated via its thickness increasing. It makes more energy consumed by gas passing through the pore structure, finally resulting in poor gas permeability of porous Ti sheet.