Slag mill, Dahua Machinery (certified), Tianshui City Mill provided by Gongyi City Dahua Machinery Co., Ltd. Gongyi City Dahua Machinery Co., Ltd. (www.dhqmj.com/) is specialized in the "mill, shredders, briquetting machine, dryer, brick" of the enterprise, the company of "honesty, hard service" concept provide you with the highest quality products and services. Welcome to inquire! Contact: Cattle Ocean Road. Contact with the spherical ball corners problem tile and hollow shaft journal: Some people think that the spherical hollow shaft journal tile contact with a large majority of small corners well, at least not be <60 degrees, it is not true, because the national building materials industry Standard JC334.1-94 first 4.3.2.1c provisions, the "contact angle package should be <35 degrees, which is summed up in accordance with a lot of practice, theory slag mill, the smallest corners depending on the material bearing alloys Since mill equipment bearing alloy is a soft material, simplified under gravity, bearing alloys have some distortion, so the contact angle is too small package is not good, when the contact angle is relatively small package, can effectively ensure the hollow shaft journal in normal conditions does not hold tile, Furthermore, since the contact angle is relatively small package, there is a large range of angles of backlash can guarantee lubricating oil can be smoothly into the contact area, the contact area to ensure lubrication and beneficial Hollow shaft journal and spherical heat tile, we can see a dry ball mill, corners should contact <35 ° is appropriate, then deal with the shaft Wawa surface becomes more efficient, easy to improve the quality of the contact surface. scratches and cutting ditch plastic deformation occurs in the metal deposited on the sides and front, high strain rate plastic deformation has occurred so that the internal dislocation pile of metal to form cell-like structure, the nature of hard and brittle, and then after repeated rolling, producing strain fatigue crack, hard and brittle nature, and then after repeated rolling, producing strain fatigue crack extended to the surface, causing debris to fall off, fatigue wear, impact stress balls in repeated changes of contact stress and shear stress effect next, by the repeated impact, squeeze and slide between each other, in the alternating pressure and shear stress, causing alternating Hertz contact stress at the surface of the material to produce maximum alternating shear stress, touching the edge of a peak tensile stress, resulting in sub-surface brittle phases, inclusions or voids at the fatigue crack, crack propagation and intertwined, and finally to the ball and wear skin peeling, if cracks in the deeper parts of the cone ball mill, and along the brittle phase and defect to internal expansion, the formation of large crack depth, crack will extend to the surface of the merger, it will make the ball fall off the surface of a block, the ball surface fatigue wear, brittle wear, in a wet ball mill slag for use in mines, abrasive media (belonging electrolyte solution) and the wear conditions act on the material surface, the occurrence of corrosion and wear ball, wet grinding grinding media consumption over dry 5 to 7 times, the consumption of corrosion mill system failure rates much higher than the corrosion of materials and wear alone because of material consumption and the loss rate of corrosion damage to the mechanical properties of the material surface, so that the material is accelerated wear, wear constantly produce "new" material surface, but also improves the corrosion rate. These are Dahua Machinery Ltd. for the ball in the form of wear mechanism of the failure analysis, to improve the life of the ball, the material should have a series of mechanical properties of high hardness, high impact fatigue strength, high fracture toughness and impact toughness, another respect, slag mill parameters also affect the wear and fatigue life of the steel ball.