{"id":20704,"date":"2021-08-18T01:25:14","date_gmt":"2021-08-18T01:25:14","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=20704"},"modified":"2021-08-18T01:25:15","modified_gmt":"2021-08-18T01:25:15","slug":"how-to-make-metal-micro-powder","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/hi\/how-to-make-metal-micro-powder\/","title":{"rendered":"\u092e\u0947\u091f\u0932 \u092e\u093e\u0907\u0915\u094d\u0930\u094b \u092a\u093e\u0909\u0921\u0930 \u0915\u0948\u0938\u0947 \u092c\u0928\u093e\u090f\u0902?"},"content":{"rendered":"
\u092a\u093e\u0909\u0921\u0930 \u0927\u093e\u0924\u0941 \u0935\u093f\u091c\u094d\u091e\u093e\u0928 \u0927\u093e\u0924\u0941 \u092a\u093e\u0909\u0921\u0930 \u092c\u0928\u093e\u0928\u0947 \u0914\u0930 \u0927\u093e\u0924\u0941 (\u092f\u093e \u0927\u093e\u0924\u0941 \u0914\u0930 \u0917\u0948\u0930-\u0927\u093e\u0924\u0941 \u092e\u093f\u0936\u094d\u0930\u0923) \u092a\u093e\u0909\u0921\u0930 \u0915\u094b \u0915\u091a\u094d\u091a\u0947 \u092e\u093e\u0932 \u0915\u0947 \u0930\u0942\u092a \u092e\u0947\u0902 \u092e\u094b\u0932\u094d\u0921\u093f\u0902\u0917 \u0914\u0930 \u0938\u093f\u0902\u091f\u0930\u093f\u0902\u0917 \u0915\u0947 \u092e\u093e\u0927\u094d\u092f\u092e \u0938\u0947 \u092d\u093e\u0917\u094b\u0902 \u0914\u0930 \u0909\u0924\u094d\u092a\u093e\u0926\u094b\u0902 \u0915\u094b \u092a\u094d\u0930\u093e\u092a\u094d\u0924 \u0915\u0930\u0928\u0947 \u0915\u0940 \u090f\u0915 \u092a\u094d\u0930\u0915\u094d\u0930\u093f\u092f\u093e \u0939\u0948\u0964 \u0909\u0926\u094d\u092f\u094b\u0917 \u0915\u0947 \u092e\u0941\u0916\u094d\u092f \u0915\u091a\u094d\u091a\u0947 \u092e\u093e\u0932 \u0915\u0947 \u0930\u0942\u092a \u092e\u0947\u0902, \u0927\u093e\u0924\u0941 \u092a\u093e\u0909\u0921\u0930 \u0915\u093e \u0935\u094d\u092f\u093e\u092a\u0915 \u0930\u0942\u092a \u0938\u0947 \u092e\u0936\u0940\u0928\u0930\u0940, \u0927\u093e\u0924\u0941 \u0935\u093f\u091c\u094d\u091e\u093e\u0928, \u0930\u093e\u0938\u093e\u092f\u0928\u093f\u0915 \u0909\u0926\u094d\u092f\u094b\u0917 \u0914\u0930 \u090f\u092f\u0930\u094b\u0938\u094d\u092a\u0947\u0938 \u0938\u093e\u092e\u0917\u094d\u0930\u0940 \u0915\u0947 \u0915\u094d\u0937\u0947\u0924\u094d\u0930 \u092e\u0947\u0902 \u0909\u092a\u092f\u094b\u0917 \u0915\u093f\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948\u0964 \u0927\u093e\u0924\u0941 \u092a\u093e\u0909\u0921\u0930 \u092a\u093e\u0909\u0921\u0930 \u0927\u093e\u0924\u0941 \u0935\u093f\u091c\u094d\u091e\u093e\u0928 \u0909\u0926\u094d\u092f\u094b\u0917 \u0915\u093e \u092e\u0942\u0932 \u0915\u091a\u094d\u091a\u093e \u092e\u093e\u0932 \u0939\u0948\u0964 \u0907\u0938\u0915\u093e \u0909\u0924\u094d\u092a\u093e\u0926\u0928 \u0914\u0930 \u0917\u0941\u0923\u0935\u0924\u094d\u0924\u093e \u092a\u093e\u0909\u0921\u0930 \u0927\u093e\u0924\u0941 \u0935\u093f\u091c\u094d\u091e\u093e\u0928 \u0909\u0926\u094d\u092f\u094b\u0917 \u0915\u0947 \u0935\u093f\u0915\u093e\u0938 \u0915\u094b \u0928\u093f\u0930\u094d\u0927\u093e\u0930\u093f\u0924 \u0915\u0930\u0924\u0940 \u0939\u0948\u0964<\/strong><\/strong><\/p>\n\n\n\n Metal powder is usually an aggregate of metal particles less than 1mm. There is no uniform provision for the division of granularity interval. The common classification method is as follows: the particles with a particle size of 1000 ~ 50 \u00b5 m are conventional powders; 50 ~ 10 \u00b5 m fine powder; 10 ~ 0.5 \u00b5 m is called very fine powder< 0.5 \u00b5 m is called ultrafine powder; 0.1 ~ 100nm is called nano powder. Each powder particle may be one crystal or composed of many crystals, depending on the particle size and preparation method.<\/strong><\/strong><\/p>\n\n\n\n At present, there are dozens of methods for industrial production of powder, but according to the substantive analysis of the production process, it is mainly divided into two categories: mechanical method and physicochemical method. It can be obtained not only from the direct refinement of solid, liquid and gaseous metals, but also from the reduction, pyrolysis and electrolytic transformation of metal compounds in different states. Carbides, nitrides, borides and silicides of refractory metals can generally be prepared directly by chemical combination or reduction chemical combination. Due to different preparation methods, the shape, structure and particle size of the same powder are often very different.<\/strong><\/strong><\/p>\n\n\n\n The choice of metal powder production method depends on raw materials, powder type, performance requirements of powder materials and powder production efficiency. With the more and more extensive application of powder metallurgy products, the requirements for the size, shape and properties of powder particles are higher and higher. Therefore, the powder preparation technology is also developing and innovating to meet the requirements of particle size and properties.<\/strong><\/strong><\/p>\n\n\n\n Mechanical method is a processing method that breaks metal into required particle size powder with the help of external mechanical force. The chemical composition of the material is basically unchanged during the preparation process. At present, the commonly used methods are ball milling and grinding, which have the advantages of simple process and large output. It can prepare some ultra-fine powders of high melting point metals and alloys that are difficult to obtain by conventional methods.<\/strong><\/strong><\/p>\n\n\n\n Mechanism: ball milling method is mainly divided into rolling ball method and vibration ball milling method. This method makes use of the mechanism that metal particles are broken and refined due to strain at different strain rates.<\/strong><\/strong><\/p>\n\n\n\n Application: this method is mainly applicable to the preparation of sb, Cr, Mn, Fe Cr alloy and other powders.<\/strong><\/strong><\/p>\n\n\n\n Advantages and disadvantages: it has the advantages of continuous operation and high production efficiency. It is suitable for dry grinding and wet grinding. It can prepare the powder of a variety of metals and alloys. The disadvantage is that the selectivity of materials is not strong, and it is difficult to grade in the process of powder preparation.<\/strong><\/p>\n\n\n\n2. Preparation method of metal powder<\/strong><\/strong><\/h2>\n\n\n\n
2.1 mechanical physical method<\/strong><\/strong><\/h2>\n\n\n\n
2.1.1 ball milling method<\/strong><\/strong><\/h3>\n\n\n\n