Wear-resistant steel is a general term for steel materials with high wear resistance, which is used wildest of wear-resistant materials nowadays. At present, the commonly used wear-resistant steel plate is a product made by welding a certain thickness of a hard layer with high hardness and excellent wear resistance on the surface of ordinary low carbon steel, or low alloy steel with good toughness and plasticity by surfacing welding method. In addition, there are cast wear-resistant steel plates and alloy hardened wear-resistant steel plates.
Wear-resistant steel is widely used in mining machinery, coal mining, engineering machinery, agricultural machinery, building materials, electric machinery, railway transportation and other departments.
For example, the ball of the ball mill, the liner, the teeth of the excavator, the bucket, the rolling wall of various crushers, the tooth plate, the hammer head, the track plate of the tractor and the tank, the blower plate of the fan mill, the coal mine scraping Medium trough plate, trough, ring chain for bulldozers, blade for bulldozers, shovel teeth, linings for large electric wheel hoppers, roller bits for perforation of oil and open iron ore, etc. It is also mainly limited to the application of wear-resistant steel subjected to abrasive wear, and all kinds of machines with relative motion will produce various types of wear, which will improve the wear resistance of the workpiece.
Grinding media (balls, rods and liners) used in ore and cement mills are high-consumption steel wear parts. In the United States, most of the grinding balls are forged or cast from carbon steel and alloy steel, which account for 97% of the total ball wear. In Canada, the ball consumed in the grinding ball accounted for 81%.
According to the statistics of the late 1980s, China consumes about 80 to 1 million tons of grinding balls per year. The annual consumption of mill liners is nearly 200,000 tons, most of which are steel products. The central trough of the scraper conveyor in China's coal mines consumes 60,000 to 80,000 tons of steel plates per year.
1. The steel plate cutting method is suitable for cold cutting and hot cutting. Cold cutting includes water jet cutting, shearing, sawing or abrasive cutting; thermal cutting includes oxygen fuel flame cutting (hereinafter referred to as "flame cutting"), plasma cutting and laser cutting.
2. Cutting method: Through the relevant process test, master the general characteristics and cutting thickness range of various cutting methods of steel plates.
3. The flame cutting method of high-grade wear-resistant steel is as simple as the cutting of ordinary low-carbon and low-alloy steel. When cutting wear-resistant steel thick plates, you need to pay attention! As the thickness and hardness of the steel sheet increase, the tendency of the crack at the edge of the cut increases.
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