In the field of wear-resistant steel balls, cast steel balls and forged steel balls belong to grinding steel balls, which are suitable for different fields such as mining, construction, metallurgy, chemical industry, cement, etc. The two kinds of steel balls have both common characteristics and differences, so , how to choose a suitable steel ball forging process?
Casting steel balls (casting grinding balls) are made by heating waste materials such as scrap steel and scrap iron with an intermediate frequency electric furnace to fully melt the furnace materials. etc.) to the furnace for chemical composition quenching and tempering. After the temperature of the molten iron reaches a certain temperature and meets the requirements of the process regulations, the qualified molten iron is poured into the steel ball mold or the mold of the steel ball production line, so that the steel balls smelted by casting are cast steel. ball.
Features of cast steel balls:
(1) Rough surface: The sprue is prone to flat top and deformation and out-of-round during use, which affects the grinding effect;
(2) Internal looseness: Due to the use of casting molding, the internal structure of the ball is coarse, the breakage rate is high during use, and the impact toughness is small. The larger the ball and the bigger the mill, the greater the probability of breaking;
(3) Not suitable for wet grinding: the wear resistance of the cast ball depends on the chromium content, the higher the chromium content, the more wear-resistant, but the chromium element is easy to corrode, the higher the chromium, the easier it is to be corroded, especially the chromium in the ore Sulfur, due to the use of chromium balls under the above wet grinding conditions, the cost will increase and the output will decrease.
Hot-rolled steel ball is a brand-new rotary cutting process technology, which is a technological breakthrough in the ball milling ball manufacturing industry, and is gradually replacing cast steel balls. The comparison between hot-rolled milling steel balls and cast balls, the diameter range of steel balls is φ20-φ120mm, and the material of rolling milling steel balls is hot-rolled round steel rods containing relevant chemical elements in specific proportions. Similar in diameter.
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(1) Smooth surface: produced by forging process, the surface has no defects, no deformation, no loss of roundness, and maintains the excellent effect of grinding.
(2) Internal tightness: because it is forged from round steel, it avoids the defects caused by the process in the as-cast state. Broken rate.
(3) Both dry and wet grinding: Due to the use of high-quality alloy steel and the new high-efficiency anti-wear material independently developed by our company, the alloy elements are reasonably proportioned and rare elements are added to control the content of chromium, so that its corrosion resistance is greatly improved. Improvement, in view of the fact that mines are mostly wet grinding, this steel ball is more suitable for its working conditions.
If you want to choose a steel ball production equipment suitable for you, you need to consider factors such as output, steel ball diameter, cost, and labor. Henan Jinzhen Equipment Co., Ltd., through years of development and accumulation of forging equipment development experience, has launched a design consulting service, which can be based on customer needs, from forging process design, forging equipment selection, whole line process layout, auxiliary system configuration, etc. Provide professional advice to clients. If you want to buy steel ball skew rolling mill, please contact us!
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