文章信息/Info

Title:

Application of Non�睠ontact Measurement Techniques in Gas Atomization Powder Preparation Research

文章編號:

1674-3962(2020)03-0206-08

作者:

劉楊; 張國慶; 李周; 許文勇; 鄭亮; 袁華; 劉娜

（中國航發(fā)北京航空材料研究院 先進高溫結(jié)構(gòu)材料重點實驗室，北京 100095）

Author(s):

LIU Yang;  ZHANG Guoqing;  LI Zhou;  XU Wenyong;  ZHENG Liang;  YUAN Hua;  LIU Na

(Science and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China)

關(guān)鍵詞:

非接觸式測試; 氣霧化; 流場形貌; 速度分布; 液滴粒徑分布; 溫度場

Keywords:

non-contact measurement;  gas atomization;  flow field morphology;  velocity distribution;  droplet size distribution; temperature

分類號:

TF123

DOI:

10.7502/j.issn.1674-3962.201908016

文獻標(biāo)志碼:

A

摘要:

氣霧化制粉是目前大規(guī)模制備高品質(zhì)合金粉末的主流工藝，在粉末冶金、增材制造、熱噴涂、釬焊等領(lǐng)域具有廣泛的應(yīng)用價值。霧化過程決定最終粉末的品質(zhì)，因此開展氣霧化過程研究具有重要的意義。傳統(tǒng)研究氣霧化制粉過程的方法多采用接觸式測試技術(shù)，通過設(shè)計實驗間接進行研究，存在周期長、成本高、與實際工況差別較大、無法進行瞬態(tài)研究等缺點，對氣霧化機理研究和氣霧化系統(tǒng)結(jié)構(gòu)設(shè)計的指導(dǎo)價值非常有限。近年來，國內(nèi)外學(xué)者借鑒流體力學(xué)領(lǐng)域的一些測試技術(shù)，開展了氣霧化過程非接觸式測試實驗研究。根據(jù)研究對象分類，對適用于流場形貌、速度分布、液滴粒徑分布以及溫度場研究的非接觸式測試技術(shù)進行了綜述，闡述了這些技術(shù)的原理以及應(yīng)用，并對氣霧化過程測試技術(shù)的未來發(fā)展方向進行了展望。

Abstract:

Nowadays gas atomization is the main technology for large-scale preparation of high-quality alloy powder. The gas-atomized powders possess the advantages of homogeneous composition, narrow particle size distribution, low impurity gas content, low inclusion level and high sphericity. It is widely applied in the fields such as powder metallurgy, additive manufacturing, thermal spraying and brazing. The atomization process determines powder quality, therefore it is significant to study the atomization process. The traditional methods mostly use the contact measurement technology through indirect experiments, which have many disadvantages such as time consuming, high cost, difference with actual conditions, and difficulty of carrying out transient process research, and bring less guidance to the study of atomization mechanism and the structure design of atomization system. In recent years, scholars have utilized some non-contact measurement experiments used in the field of hydrodynamics. According to the classification of the research objects, the non-contact measurement techniques adaptive for the study of flow field morphology, velocity distribution, droplet size distribution and temperature field are summarized, the principles of these techniques and some related applications are introduced, the future development direction of the measurement techniques for gas atomization process is prospected.