Common defects in final quenching heat treatment of cold rolling work rolls
1. The reasons for low hardness after quenching are: (1) Low quenching temperature (2) The quenching water pressure is low, the water volume is not enough, and the cooling speed is not enough (3) Surface decarburization (4) Steel has poor hardenability (5) Too much retained austenite Preventive or precautionary measures: (1) Increase the […]
Cooling issues in the use of high-speed steel rolls
The thermal expansion of high-speed steel rolls is large, and the poor temperature distribution of the rolls can easily cause uneven thermal expansion and abnormal shedding of the oxide film, which affects the thermal crown and roll gap accuracy of the rolls. The key factor affecting the oxide film and thermal crown of high-speed steel […]
Roll material and heat treatment process
The life of the roll mainly depends on the intrinsic performance and working force of the roll. The intrinsic performance includes strength and hardness. To make the roll have sufficient strength, we mainly consider the roll material; hardness usually refers to the hardness of the working surface of the roll, which determines the wear resistance […]
Research on the Application Technology of High Speed Steel Rolls
High-speed steel rolls are high-carbon high-alloy steels containing a large amount of tungsten, molybdenum, chromium, vanadium and other elements in the working layer. They have the characteristics of high hardness, excellent wear resistance, good hardenability and high red hardness, and are widely used in heat transfer rolling mills. Products rolled with high-speed steel rolls have […]
Application Research of High Boron High Speed Steel Alloy Composite Roll in Rebar Production
1 Introduction Rolls are the largest consumable parts in the metallurgical industry, and the consumption cost of rolls is about 5%-10% of the production cost of steel rolling, which is directly related to the production efficiency, product quality and production cost of steel production enterprises. Most of the rolls currently in use are high-nickel-chromium-molybdenum infinite […]
Machining of High Speed Steel Roll Pass
1. Selection of cutting tools and processing technology for high-speed steel rolls High-speed steel rolls have been recognized by iron and steel companies for their high wear resistance, high rolling capacity, and high operating rate. However, the problem of pass processing of high-speed steel rolls has always plagued users and affected their further application. […]
Influence of heat treatment process on properties of HSS roll
1. Common components and characteristics of forged high-speed steel rolls Before the end of the 1980s, forged high-speed steel rolls had been used to manufacture work rolls and intermediate rolls of multi-roll mills. It is a standard type of tungsten-molybdenum high-speed steel, such as American M2, M4 and high-carbon type T15. High-speed steel rolls use […]
How to solve the problem of hot-rolled coil staggering?
The problem of misalignment of hot-rolled coils in continuous casting and rolling mills is a long-term problem. The appearance of staggered layers brings inconvenience to the bundling, spraying and dispatching of steel coils, and at the same time makes the originally qualified strips become defective products after coiling, resulting in losses. In practice, it […]
Segregation Control Technology of Centrifugal Casting High Speed Steel Roll
Centrifugal casting roll has the advantages of a simple production process and equipment, high production efficiency, compact structure and less processing, and occupies a very important position in the field of high-speed steel roll manufacturing. Due to the effect of centrifugal force and the large density difference between various alloy elements and carbides formed in […]
The difference between high speed steel roll and cemented carbide roll
Cemented carbide rolls are developed on the basis of cemented carbide tools. Cemented carbide is sintered with hard tungsten carbide particles and bonded phase metals such as nickel and cobalt. The performance of cemented carbide depends on the size of tungsten carbide particles and the content of the binder phase metal. When the binder phase […]