Forged steel rubber and plastic calendar roller and heat treatment method thereof

Abstract

The invention discloses a forged steel rubber and plastic calendar roller and a heat treatment method thereof. The roller comprises, by weight percentage, 0.50%-0.75% of C, 0.40%-0.80% of Si, 0.60%-0.90% of Mn, not larger than 0.025% of P, not larger than 0.025% of S, 2.50%-3.50% of Cr, 0.30%-0.50% of Mo, 0.05%-0.15% of V and the balance Fe and inevitable impurities. According to the forged steel rubber and plastic calendar roller and the heat treatment method, the medium-frequency induction quenching technology is adopted, the heating speed is high, the quenching temperature is high, and weer and more even textures are obtained on the surface of the roller; and meanwhile, in cooperation with the movement speed during roller quenching, the heating time is controlled to obtain the shallow quenching layer thickness, and the machining performance of an inner layer is guaranteed.

Description

technical field [0001] The invention belongs to the field of roller manufacture, and relates to a forged steel rubber-plastic calender roller and a heat treatment method thereof. Background technique [0002] The production process of rubber and plastic products Due to the requirements of the production process, the material of the rubber and plastic calender roller is generally made of chilled cast iron with high surface hardness and a certain strength and toughness in the core, and alloy chromium, molybdenum or nickel is added to increase the mechanical strength. , Wear resistance and heat resistance. [0003] However, during the working process of the above-mentioned chrome-nickel series of roll materials, the surface roughness of many work rolls decreases sharply, which directly affects the surface quality of the product and the qualified rate of the product. For high-precision products (such as plastic films), the surface of the roller must have sufficiently high surfa...

AI Technical Summary

Problems solved by technology

The conventional cast iron roller material cannot meet the requirements. Forged steel material has become the high-end material choice for rubber and plastic rollers at home and abroad due to its fine and uniform grain size, strong thermal conductivity and high heat resistance.

In the heat treatment of the roller, the traditional overall quenching or roller induction quenching method makes the hardened layer and the transition layer thicker and the hardness is higher. When the internal cooling hole is processed in the later stage, the drill bit is worn and broken, making it impossible to process.