How to choose the most popular stainless steel cut

2022-08-24
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How to choose stainless steel cutting tools

according to the cutting characteristics of stainless steel, it is required that the tool material should have the characteristics of good heat resistance, high wear resistance, low affinity with stainless steel, etc., so the reasonable selection of tool material is an important condition to ensure the high-efficiency cutting of stainless steel. At present, the commonly used cutting tool materials are high-speed steel and cemented carbide

1. Selection of high-speed steel: high-speed steel is mainly used to manufacture milling cutters, drill bits, taps, Broaches and other complex multi edge tools. When ordinary high-speed steel W18Cr4V is used, the tool durability is very low, which does not meet the needs. Using new high-speed steel tools to cut stainless steel can obtain better results

under the same turning conditions, 1Cr17Ni2 workpieces are processed with tools made of W18Cr4V and 95w18cr4v. The number of workpieces processed at one time by tool grinding is 2 ~ 3 and 12 respectively. The durability of tools made of 95w18cr4v is increased several times. This is because the carbon content of the steel is increased, thus increasing the carbide in the steel. According to the time content of the stopwatch, the hardness at room temperature is increased by 2hrc, and the red hardness is better. 60 it must be closed tightly. At 0 ℃, it rises from hrc48.5 of W18Cr4V to HRC51 ~ 52, and the wear resistance is 2 ~ 3 times higher than W18Cr4V

using high vanadium high speed steel w12cr4v4mo to make profile milling cutter to process 1Cr17Ni2 can obtain higher tool durability. Because the vanadium content increases, VC with high hardness can be formed in the steel. Fine VC exists in the crystal medium, which can prevent grain growth and improve the wear resistance of the steel; W12cr4v4mo has good red hardness, and the hardness can reach hrc51.7 at 600 ℃, so it is suitable for making various complex cutting tools for cutting stainless steel. However, its strength (sb=3140mpa) and impact toughness (ak=2.5j/cm34, when Jinan assay is loaded) are slightly lower than W18Cr4V, so we should pay attention to it when using it

with the continuous development of tool manufacturing technology, for large quantities of workpieces, the effect of cutting with cemented carbide multi edge and complex tools will be better

2. Selection of cemented carbides: YG cemented carbides have good toughness, large rake angle can be used, and the blade can also be sharpened, so that the cutting is not allowed to have oil return phenomenon, which is light and fast, and the chip and the tool are not easy to bond, so they are more suitable for processing stainless steel. Especially in vibration rough turning and intermittent cutting, this advantage of YG alloy is more important. In addition, YG alloys have good thermal conductivity, which is nearly twice that of high-speed steel and twice that of YT alloys. Therefore, YG alloys are widely used in stainless steel cutting, especially in the manufacture of rough turning tools, cutting tools, reamers and reamers

for a long time, cemented carbides of YG6, YG8, YG8N, yw1, yw2 and other common brands have been generally used as cutting tool materials for cutting stainless steel, but they can not achieve satisfactory results; Using new grades of cemented carbide such as 813, 758, 767, 640, 712, 798, ym051, ym052, YM10, ys2t, yd15, etc., good results can be obtained in cutting stainless steel. The effect of cutting austenitic stainless steel with 813 grade cemented carbide tool is very good, because 813 alloy not only has high hardness (≥ hra91), strength (sb=1570mpa), but also has good high-temperature toughness, oxidation resistance, adhesion resistance, compact structure and good wear resistance

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