Industry knowledge 

Definition: Two-component hot rolling is a production method that combines two different materials (such as alloys or metals with different compositions) through the hot rolling process to obtain a composite material with specific properties. 

Process flow: It includes stages such as slab preparation, heating, rolling, and cooling. During the rolling process, the two materials achieve metallurgical bonding under the influence of high temperature and pressure. 

Material selection: Based on the performance requirements of the final product, select appropriate substrates and composite materials. For example, in automotive manufacturing, high-strength steel may be combined with corrosion-resistant alloys to meet the dual demands of vehicle body strength and corrosion resistance. 

Equipment requirements: It is necessary to have precise temperature control, strong rolling pressure, and excellent roll adjustment capabilities to ensure that the two materials can deform uniformly and bond tightly during the rolling process. 

Quality control: By testing indicators such as the interface bonding strength, dimensional accuracy, and surface quality of the composite materials, we ensure that the product quality meets the standard requirements. 

Application fields: Widely used in industries such as automobiles, aerospace, and mechanical manufacturing, for the production of components with specific performance requirements, such as automotive exhaust pipes and aircraft engine parts, etc. 

Common Questions and Answers 

What are the advantages of two-component hot-rolled products? 

It can achieve the optimized combination of different material properties, such as simultaneously possessing high strength and good corrosion resistance; increase the utilization rate of materials and reduce costs; through the hot rolling process, form a strong metallurgical bond between materials, improving the reliability and service life of the products. 

What are the common problems encountered during the two-component hot rolling process? 

There may be problems such as poor interface bonding of materials, dimensional deviations, and surface defects. These issues may be caused by various factors, including poor quality of raw materials, unreasonable rolling process parameters, and equipment failures. 

How to solve the problem of poor bonding in two-component hot rolling? 

First, ensure that the surface of the raw materials is clean and free of oxide scales and other impurities; then, reasonably adjust the process parameters such as rolling temperature and pressure to enable the two materials to undergo sufficient deformation and achieve a close bond during the rolling process; at the same time, strengthen the maintenance and adjustment of the equipment to ensure the parallelism of the rolls and the uniformity of the pressure. 

What are the special requirements for the equipment when using two-component hot-rolled materials? 

A highly precise temperature control system is required, capable of accurately controlling the temperature of the heating furnace and the rolling process; the rolling mill should have sufficient rolling force and good roll adjustment functions to meet the rolling requirements of different materials; in addition, complete detection equipment should be equipped to monitor the product quality in real time. 

How to improve the surface quality of two-component hot-rolled products? 

Before rolling, perform appropriate surface treatments on the raw materials, such as grinding and polishing, to reduce the surface roughness; optimize the rolling process, reasonably control parameters such as rolling speed and reduction amount, and avoid surface defects caused by excessive speed or excessive reduction; use high-quality rolls and conduct regular maintenance and replacement to ensure the smoothness of the roll surface.