forged rolls manufacturing process is：
Electric arc furnace smelting → LF \ VD refining → ingot casting → annealing → cleaning → electroslag remelting → annealing → forging → post forging heat treatment → rough machining → preliminary heat treatment → semi finishing → dual frequency quenching or differential temperature treatment → cryogenic treatment → tempering → finishing → packaging and delivery.
Double refining + electroslag remelting to ensure good metallurgical quality
Perfect heat treatment and cold treatment technology to ensure the depth and hardness uniformity of hardened layer
Are classified by material as follows:
(1) Forging alloy steel roll;
(2) Forging semi-steel rolls;
(3) Forged semi-high-speed steel rolls;
(4) Forging white cast iron rolls.
In the manufacturing process of forging rolls, there are several key points that require special attention:
Material selection:
Ensure that high-quality alloy steel or other suitable materials are selected to meet the performance requirements of the roller.
Temperature control:
During the forging and heat treatment process, strictly control the heating and cooling temperatures to avoid cracks or deformation of the material.
Forging process:
Pay attention to the uniformity of forging and the forging ratio during forging to ensure that the internal structure of the material is uniform and dense.
Heat treatment process:
The heating and cooling speed and the holding time during the heat treatment process must be strictly controlled to obtain the required hardness and toughness.
Processing accuracy:
During the roughing and finishing process, ensure the accuracy of size and shape to avoid over-processing or under-processing.
Surface treatment:
The surface treatment process must be strictly implemented to improve the wear resistance and corrosion resistance of the roller.
Quality inspection:
Quality inspection is required at each link, including material inspection, size inspection, hardness test and surface inspection to ensure that the product meets the standards.
Safe operation:
During the entire manufacturing process, strictly abide by the safety operating procedures to prevent worker injuries and equipment damage.
By paying attention to these key points, the quality and performance of the forged roller can be ensured to meet the use requirements.
