Wheel forgings are an important part of the ladle car, rolling on the track and bearing the load of the ladle's own weight and hoisting weight. The working characteristics of the ladle wheel are low speed and heavy load. Therefore, the material of the wheel forging must have strength, hardness and good wear resistance. The ladle car wheels are available in cast steel, forged and rolled. The early ladle wheels were basically cast steel wheels, and in recent years, forged and rolled wheels have been widely used.
At present, the material of forged wheels is usually 65Mn and CL60. Today, Xiaobian represents Shanxi Yongxinsheng Forgings Factory to introduce the comparison and comparison of these two materials commonly used in ladle car wheels.
The material of the forged wheel in the production of the ladle is usually 65Mn and CL60. For the working characteristics of the ladle wheel, the wheel has certain requirements on the chemical composition and mechanical properties of the material.
CL60 steel has high strength, hardness and elasticity. It is low in shape during cold deformation. It is suitable for high-speed running wheels. The ladle wheel requires high strength, wear resistance and certain elasticity during operation. CL60 for wheel forgings is a suitable material.
65Mn is a high-quality carbon structural steel, which is a commonly used spring steel material. The strength, hardness, elasticity and hardenability of the steel are higher than those of ordinary steel. The heat treatment of the ladle wheel is usually quenched and tempered. After heat treatment, the structure is tempered tortonia. The elastic limit and yield limit of the structure are high and have certain toughness. 65Mn has the above-mentioned advantages and is inexpensive, easy to purchase, and is suitable for use in ladle cars.
From the chemical composition of the two, 65Mn contains more chemical elements such as manganese, chromium, nickel and copper. Among them, manganese provides hardenability as the main metal element, which is the tendency of decarburization on the surface of the material, and the mechanical properties of the material after heat treatment are better. In addition, most of the manganese is dissolved in the ferrite to form a replacement solid solution, and the ferrite is strengthened, and a part of the manganese is dissolved in Fe3C to form an alloy cementite. Manganese can also increase the relative amount of pearlite and make it thinner, thereby increasing the strength of steel; manganese can be combined with S to form MnS to alleviate the harmful effects of S. In addition, an increase in elements such as chromium can refine carbides, improve hardenability and tempering stability, and increase strength. Therefore, it is better to use a 65 Mn material for the ladle car.
65Mn wheel forgings are practical and affordable materials. If better performance is required, the overall performance of forged wheels 42CrMo and 40CrNiMo will be better. Alloy steel wheel forgings have good toughness, heat treatment hardness is easier to improve, and materials can be selected for more mechanical use and frequency requirements.