Views: 0 Author: Site Editor Publish Time: 2022-07-01 Origin: Site
Carburizing quenched steel is a high hardness steel part after carburizing quenching process, carburizing quenching process is commonly used in low carbon steel, low carbon alloy steel, such as 20Cr, 20CrMnTi, etc. The hardness of gears after carburizing and quenching is generally between HRC58-62, and the hardness of 20Cr carburizing and quenching steel parts is also above HRC55 degrees. In the production activities, choosing the right serrated knife can effectively improve the efficiency of production. So, how to choose for the turning process of such high hardness steel parts?
The material of the serrated knife
How to choose the right serrated knife
In order to meet the requirements of use, carburizing quenched steel gear hardness requirements, to 20CrMnTi gear, for example, tooth surface HRC58-62 degrees, tooth surface carburizing layer depth <1.8mm, gear accuracy grade 6, gear roughness Ra 1.6 ~ 0.8.
These inserts can be used for large gears and gear rings, such as high-speed railway gears, large gear rings for construction machinery, large gear rings for heavy industry, etc. After carburizing and quenching, the outer diameter is expanded, the size of the tooth width is different, the tooth width direction is tapered or drum-shaped, the deformation amount reaches 2mm, while the hardness is as high as HRC60~65 degrees, this case chooses the whole polycrystalline blade BN-S20 processing, BN-S20 whole are cubic boron nitride super hard material, no installation hole in the middle, more impact resistance. If BN-S20 SNMN120712 is used for rough turning of HRC60 degree gear tooth top circle, the tool life is increased by more than ten times compared to ceramic inserts with one times higher cutting speed.
These inserts can be used for intermittent machining of high hardness quenched steel gears. When cutting quenched steel gears at high speed, if intermittent cutting exists, the tool will be impacted more than 100 times per minute. -H20 C75 can solve the problem of intermittent machining of hardened steel gears. For example, BN-H20 C75 CNGA120408 inserts are used for intermittent machining of 20CrNiMo gear bore and end face, and dry cutting at a high speed of 300 rpm, the machining results are very good, and the surface roughness of the tooth ring is within Ra0.8.
These inserts can be used for gear processing with very high requirements for accuracy and finish. Some gear workpieces require a high surface roughness of Ra0.2 and dimensional accuracy of 2 wires or less, so BN-H05 can meet the requirements. For example, BN-H05 CNGA120408 can improve tool life by 45% compared with a brand PCBN insert at 180m/min line speed with dry cutting, while ensuring a Ra0.8 finish, with little difference in unit price.
There is an old Chinese saying that we should choose the right solution according to the real situation, and the same applies to the selection of serrated knives. When choosing a serrated knife, we must first determine the material of the product to be processed, the degree of hardness and softness, and the degree of processing, and then choose the right blade according to the needs of slitting. When choosing a blade, you need to pay attention to the blade material and instructions, to ensure that the desired blade is indeed suitable for your product.
In the uncertainty of what type of knife should be selected, you should seek help from professionals. Maanshan King knife Machinery Co., Ltd is a set of production and sales of blades, we provide professional pre-sales consulting services, you can buy from us to understand the relevant products, we will be happy to serve you.
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