What is the wear-resistant plate cutting method?

Wear-resistant plate cutting method

1) The wear-resistant 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"), isoparticle cutting and laser cutting.

2) Cutting method: Through relevant process tests, master the general characteristics and cutting thickness range of various cutting methods of steel plate.

3) The flame cutting method of high-grade wear-resistant steel is as simple as that of ordinary low-carbon and low-alloy steel. Pay attention when cutting heavy plates of wear-resistant steel! ! ! As the thickness and hardness of the steel plate increase, the tendency to crack at the cutting edge increases. In order to prevent the occurrence of steel plate cutting cracks, the following suggestions should be followed when cutting:

Cutting cracks: wear-resistant plate cutting cracks are similar to hydrogen-induced cracks during welding. If the steel plate cuts edges, it will appear within 48 hours to several weeks of cutting thickness. Therefore, cutting cracks are delayed cracks. The greater the thickness and hardness of the steel plate, the larger the cutting cracks will appear.

Preheating cutting: The most effective way to prevent steel plate cutting cracks is to preheat before cutting. Before flame cutting, the steel plate is usually preheated. The preheating temperature mainly depends on the quality grade and thickness of the steel plate, as shown in Table 2. The preheating method can be carried out by flame burner, electronic heating pad, or can be used Heating furnace heating. In order to determine the preheating effect of the steel plate, the required temperature should be tested at the heating point.

Note: Pay special attention to preheating to make the interface of the steel plate evenly heated to avoid local overheating in the area contacting the heat source.

Low speed cutting: Another way to avoid cutting cracks is to reduce the cutting speed. If it is not possible to preheat the entire page, partial preheating can be used instead. Using low-speed cutting method to prevent cutting cracks, its reliability is not as good as preheating. We recommend preheating the cutting tape with flame gun cavitation several times before cutting, and the preheating temperature should reach about 100°C. The maximum cutting speed depends on the grade and thickness of the steel plate.