Tungsten carbide roller

Abstract

The invention relates to a tungsten carbide roller. The tungsten carbide roller comprises the following components of: 84.5 to 85.5 percent of WC, 6.8 to 7.5 percent of Co, 6.8 to 7.5 percent of Ni, 0.2 to 0.5 percent of TiC, 0.2 to 0.5 percent of CrC, and 0.1 to 0.3 percent of VC. The mixed raw material powder is molded by an isostatic pressing process, and a roller blank is subjected to vacuum sintering treatment at the temperature of between 1,390 and 1,490 DEG C. Because a mixture of cobalt and nickel elements, titanium carbide, chrome carbide and vanadium carbide of hard alloy phase with extremely good bonding performance is added, the composition of the tungsten carbide roller is improved, and a reasonable internal tissue structure is formed. By reasonably selecting the sintering temperature in the vacuum state, defects of under sintering, over sintering and deformation are avoided, the tungsten carbide roller with good comprehensive performance is obtained, the rolling quantity of single-roll single rolling rings is improved by over two times, workload and expenditure of roller replacement are reduced, the work efficiency of the roller is improved, and the quality of wire products is ensured.

Description

technical field

[0001] The invention belongs to the field of steel rolling equipment, and in particular relates to a tungsten carbide roll used in a high-speed wire rod rolling mill with good organizational structure and comprehensive usability. Background technique

[0002] The roll is the key tool to make the rolled piece plastically deform and obtain the ideal design shape. The wear resistance of the roll directly affects the surface quality of the wire product and the production rate of the rolling mill. Therefore, in recent years, most of the rolls used in the high-speed wire rolling mills introduced in my country, especially the finishing mills, are imported tungsten carbide rolls. Not only does it cost a lot of foreign exchange every year, but also the price of each roll is very expensive, which virtually increases the production cost. . However, tungsten carbide rolls were developed late in our country, and the production technology of roll manufacturers is relativel...

Examples

Embodiment 1

[0012] The raw material powder containing 84.5% of WC, 6.9% of Co, 7.5% of Ni, 0.5% of TiC, 0.4% of CrC and 0.2% of VC were mixed according to the conventional process, molded and isostatically pressed into a billet, and turned into a Roll blanks of the required size. Then put the roll billet in a vacuum furnace, heat it at 1490°C for 80 minutes, and carry out high-temperature vacuum sintering treatment. Finally, the sintered rolls are subjected to ultrasonic non-destructive detection and finishing into required specifications one by one.

Embodiment 2

[0014] The raw material powder containing 85.2% of WC, 7.0% of Co, 6.8% of Ni, 0.2% of TiC, 0.5% of CrC and 0.3% of VC is mixed by conventional process, molded and isostatically pressed into a billet, then turned into the required size roll blank. Then, the turned roll blank was kept in a vacuum furnace at 1490°C for 80 minutes for high-temperature vacuum sintering. Finally, the sintered roll blanks are subjected to ultrasonic non-destructive detection one by one, and the qualified roll blanks are refined into finished rolls of required specifications.

technical field

[0001] The invention belongs to the field of steel rolling equipment, and in particular relates to a tungsten carbide roll used in a high-speed wire rod rolling mill with good organizational structure and comprehensive usability. Background technique

[0002] The roll is the key tool to make the rolled piece plastically deform and obtain the ideal design shape. The wear resistance of the roll directly affects the surface quality of the wire product and the production rate of the rolling mill. Therefore, in recent years, most of the rolls used in the high-speed wire rolling mills introduced in my country, especially the finishing mills, are imported tungsten carbide rolls. Not only does it cost a lot of foreign exchange every year, but also the price of each roll is very expensive, which virtually increases the production cost. . However, tungsten carbide rolls were developed late in our country, and the production technology of roll manufacturers is relativel...

Examples

Embodiment 1

[0012] The raw material powder containing 84.5% of WC, 6.9% of Co, 7.5% of Ni, 0.5% of TiC, 0.4% of CrC and 0.2% of VC were mixed according to the conventional process, molded and isostatically pressed into a billet, and turned into a Roll blanks of the required size. Then put the roll billet in a vacuum furnace, heat it at 1490°C for 80 minutes, and carry out high-temperature vacuum sintering treatment. Finally, the sintered rolls are subjected to ultrasonic non-destructive detection and finishing into required specifications one by one.

Embodiment 2

[0014] The raw material powder containing 85.2% of WC, 7.0% of Co, 6.8% of Ni, 0.2% of TiC, 0.5% of CrC and 0.3% of VC is mixed by conventional process, molded and isostatically pressed into a billet, then turned into the required size roll blank. Then, the turned roll blank was kept in a vacuum furnace at 1490°C for 80 minutes for high-temperature vacuum sintering. Finally, the sintered roll blanks are subjected to ultrasonic non-destructive detection one by one, and the qualified roll blanks are refined into finished rolls of required specifications.