What are the commonly used slitting tool materials?
Views : 2725
Author : Mr. Jiang
Update time : 2011-06-09 18:11:00
For the convenience of users, we introduce some particularly commonly used materials as follows:
1. G15, equivalent to H13. This material has good impact toughness, but the sharpness is not good. So it is suitable for slitting and cut-to-length of hot-rolled thick steel plates.
2. G1. In order to further improve the wear resistance and shear efficiency of G15 (H13), GOODKLIFE developed a new shear blade steel based on HI3, which is G1. In addition to Cr, G1 also contains V, Nb, W, Mo and other metal elements. They can form carbides with high hardness, and can also hinder the growth of austenite grains, thereby making the austenite grains refined. Therefore, the knife made of this material has high impact toughness, and also has high red hardness and wear resistance. It has been proved by use that its service life is 80% higher than G15 (H13), and the tensile strength of the sheared steel plate is 60% higher than G15 (H13).
3. Die steel G6 (D2). For die steel, the impact toughness and wear resistance of G6 are not the best, but they are not the worst, both are at medium level. Therefore, it is suitable for cutting the materials with a large thickness range and many varieties, and is especially suitable for some service centers that specialize in cutting various metal plates, including carbon steel, stainless steel, copper, aluminum sheet and other materials. For any specific enterprise, mixed shear is the most troublesome and undesirable, but in the case of unavoidable circumstances, the knife made of die steel is not bad choice and can play a unique adaptive role.
4. High-speed steel HSS G24, equivalent to M2. From a manufacturing point of view, high-speed steel HSS is divided into two types, one is smelted and casted according to traditional methods, and the other is pressed by powder metallurgy. The latter is good in terms of sharpness, workability, impact toughness, etc., but it is also expensive. The high-speed steel slitter knife has hard cutting edges and can process hard materials, but the toughness of ordinary high-speed steel is poor, so it is often used for cutting thin stainless steel sheets with better plate shapes. But powdered high-speed steel can adapt to the cutting of thick stainless steel sheets. However, its use is restricted due to its high price, incomplete specifications, and low material utilization. The more detailed differences between the two will be introduced in another article.
5. Tungsten Carbide TC G17. Because the tungsten carbide contains a large amount of tungsten, the cutting edge of the knife made of TC is particularly sharp and wear-resistant. So for thin coils with uniform plate shapes, knives made of TC have a particularly long service life. But its disadvantage is that the impact toughness is particularly poor, and it is impossible to always have such ideal coils in actual production. For the coils material, if there is a slight abnormality, the knife will crack, which will produce knots at the edge of the strip, which will reduce the output product level. It is this small crack that not only reduces the normal life of the knife, but also greatly increases the cost of regrinding. If the crack is too large, a very expensive knife will be scrapped. This is the reason why tungsten carbide slitter knives cannot be widely used in the metal cutting industry. At present, tungsten carbide slitter knives are widely used in the cutting of cold-rolled silicon steel sheets in the transformer industry. In order to increase the impact toughness of the tungsten carbide slitter knife, the cobalt content in the formula should be high, preferably more than 10%, and the particle size of tungsten carbide should be fine, preferably less than 1μm. In addition, the knife must undergo HIP (high temperature isostatic pressure) treatment to make its structure more refined.
6. G11, equivalent to 52100. Because it deoxidizes and degases during the smelting process, it has a uniform texture and is easy to forge. It is very suitable for the production of iron cores of BONDED STRIPPER RINGS and wider SPACERS.
1. G15, equivalent to H13. This material has good impact toughness, but the sharpness is not good. So it is suitable for slitting and cut-to-length of hot-rolled thick steel plates.
2. G1. In order to further improve the wear resistance and shear efficiency of G15 (H13), GOODKLIFE developed a new shear blade steel based on HI3, which is G1. In addition to Cr, G1 also contains V, Nb, W, Mo and other metal elements. They can form carbides with high hardness, and can also hinder the growth of austenite grains, thereby making the austenite grains refined. Therefore, the knife made of this material has high impact toughness, and also has high red hardness and wear resistance. It has been proved by use that its service life is 80% higher than G15 (H13), and the tensile strength of the sheared steel plate is 60% higher than G15 (H13).
3. Die steel G6 (D2). For die steel, the impact toughness and wear resistance of G6 are not the best, but they are not the worst, both are at medium level. Therefore, it is suitable for cutting the materials with a large thickness range and many varieties, and is especially suitable for some service centers that specialize in cutting various metal plates, including carbon steel, stainless steel, copper, aluminum sheet and other materials. For any specific enterprise, mixed shear is the most troublesome and undesirable, but in the case of unavoidable circumstances, the knife made of die steel is not bad choice and can play a unique adaptive role.
4. High-speed steel HSS G24, equivalent to M2. From a manufacturing point of view, high-speed steel HSS is divided into two types, one is smelted and casted according to traditional methods, and the other is pressed by powder metallurgy. The latter is good in terms of sharpness, workability, impact toughness, etc., but it is also expensive. The high-speed steel slitter knife has hard cutting edges and can process hard materials, but the toughness of ordinary high-speed steel is poor, so it is often used for cutting thin stainless steel sheets with better plate shapes. But powdered high-speed steel can adapt to the cutting of thick stainless steel sheets. However, its use is restricted due to its high price, incomplete specifications, and low material utilization. The more detailed differences between the two will be introduced in another article.
5. Tungsten Carbide TC G17. Because the tungsten carbide contains a large amount of tungsten, the cutting edge of the knife made of TC is particularly sharp and wear-resistant. So for thin coils with uniform plate shapes, knives made of TC have a particularly long service life. But its disadvantage is that the impact toughness is particularly poor, and it is impossible to always have such ideal coils in actual production. For the coils material, if there is a slight abnormality, the knife will crack, which will produce knots at the edge of the strip, which will reduce the output product level. It is this small crack that not only reduces the normal life of the knife, but also greatly increases the cost of regrinding. If the crack is too large, a very expensive knife will be scrapped. This is the reason why tungsten carbide slitter knives cannot be widely used in the metal cutting industry. At present, tungsten carbide slitter knives are widely used in the cutting of cold-rolled silicon steel sheets in the transformer industry. In order to increase the impact toughness of the tungsten carbide slitter knife, the cobalt content in the formula should be high, preferably more than 10%, and the particle size of tungsten carbide should be fine, preferably less than 1μm. In addition, the knife must undergo HIP (high temperature isostatic pressure) treatment to make its structure more refined.
6. G11, equivalent to 52100. Because it deoxidizes and degases during the smelting process, it has a uniform texture and is easy to forge. It is very suitable for the production of iron cores of BONDED STRIPPER RINGS and wider SPACERS.
