• <acronym id="vo8gz"></acronym>
    <track id="vo8gz"></track>
    <object id="vo8gz"><nav id="vo8gz"><small id="vo8gz"></small></nav></object>
  • <object id="vo8gz"></object>
    <acronym id="vo8gz"><strong id="vo8gz"></strong></acronym>
  • <table id="vo8gz"><option id="vo8gz"></option></table>
  • Hello, welcome to visit Ningguo Chaoyang wear resistant material Co., Ltd!?

    Mobile

    EN

    CN

    Customer Hot Line:

    +86 0563-4674042
    News detail

    Difference between forged ball and cast ball

    Release time:2021-03-24     Views

    1、 Quality index of high chromium ball:

    Chromium content ≥ 10.0% and carbon content of 1.80% - 3.20% are all called high chromium balls. The national standard requires that the hardness of high chromium ball (HRC) must be more than 58, and the impact value AK ≥ 3.0j/ / cm 2. If the hardness is high, the high-temperature quenching + tempering treatment must be adopted (at present, there are two quenching methods of oil quenching and air quenching for high chromium ball quenching). If the hardness (HRC) is lower than 54, it means that the high chromium ball has no high chromium ball There is a quenching treatment.

    2、 Quality index of medium chromium ball:

    The chromium content is 3.0% ~ 7.0%, and the carbon content is 1.80% to 3.20% respectively. The impact value AK ≥ 2.0j/, and 2. The hardness of chromium ball (HRC) must be more than 47 in the national standard. In order to ensure the quality of steel ball, high temperature tempering treatment (to achieve the goal of eliminating casting stress) is required. If the surface of steel ball is dark red, the product has been tempered at high temperature, such as the surface of steel ball The metal color still shows that the product has no high temperature tempering treatment.

    3、 Quality index of low chromium ball:

    The chromium content is 0.5% ~ 2.5%, and the carbon content is 1.80% - 3.20% respectively. The national standard requires that the hardness of low chromium ball (HRC) must be more than 45, and the impact value AK ≥ 1.5j/, and 2. In order to ensure the quality of the ball, the high temperature tempering treatment (to eliminate the casting stress) is also required. If the surface of the steel ball is dark red, the product has been tempered at high temperature, such as the ball table The surface is still metallic, indicating that the product has no high temperature tempering treatment.

    4、 Quality index of forging ball:

    The ball is made of round steel by different processes, with carbon content below 1.0%. The quality of materials is very important to the product quality (alloy element). There is no pouring port on the surface, and the ball will not deform during grinding, and it always appears spherical. The current production process is as follows:

    (1) Air hammer forging: it is common, but the labor cost is high, and the quality of products is controlled by human factors, and the quality is unstable;

    (2) Rotary cutting rolling section: this process is only used by Shandong Huamin Steel Ball Co., Ltd. and is the first fully automatic forging production line in China for its own research and development. It has low labor cost and stable product quality. The annual production capacity of one line is at least 30000 tons.

    The hardness (HRC) and wear resistance are different according to the material and technology of round steel. The surface hardness of Huamin steel ball can reach more than 60, the internal and external hardness is 1-3 degrees, and the overall wear resistance of the ball is better than that of high chromium ball.

    5、 Wear resistance comparison:

    (1) The genes are different: the forging ball material is high-quality steel, while the cast ball material is scrap iron;

    (2) The surface of the ball is smooth, and the surface quality seriously affects the deformation of the ball during grinding. Because the surface quality of the ball is superior to the casting ball, it is not easy to deform in the process of use.

    (3) The impact toughness of forging ball is more than 12, and the casting ball is only 3-6, which determines that the crushing rate of forging ball is better than that of casting ball

    (4) The cast ball is suitable for mill with diameter of 1.5-3.8m, while forging ball is suitable for mill with diameter of 1.5-11m and above.

    (5) Cast ball is only suitable for dry grinding, but forged ball is naturally corrosion resistant because of its good gene - high-quality steel, and both dry and wet grinding are suitable.

    On:What is high chromium alloy cast ball

    Next:The steel ball manufacturer interprets the difference between casting ball and rolling forging ball for you

    Scan code follow

    朝陽耐磨Mobile

    朝陽耐磨WeChat

    Contact

    Address: Zhongxi Town, Ningguo City, Anhui Province

    Tel: 0563-4674042

    Fax: 4674063

    Copyright Ningguo Chaoyang wear resistant material Co., Ltd  備案圖標.png 皖公網安備 34188102000105號 technical support:whtime.net 辰光云統計平臺

    精品国产国产自在线观看_人妻少妇精品视频三区_久久人人爽人人爽免费_一区二区三区四区视频在线

  • <acronym id="vo8gz"></acronym>
    <track id="vo8gz"></track>
    <object id="vo8gz"><nav id="vo8gz"><small id="vo8gz"></small></nav></object>
  • <object id="vo8gz"></object>
    <acronym id="vo8gz"><strong id="vo8gz"></strong></acronym>
  • <table id="vo8gz"><option id="vo8gz"></option></table>