The impact of different composition materials on Straight knives?

cWith the development of China's electronics industry becoming more and more extensive, people's requirements for the quality of electronic products are becoming more and more demanding. At the same time, with the gradual strengthening of people's awareness of environmental protection and the pursuit of efficient work efficiency, all aspects are foreshadowing that straight knives will definitely develop in the direction of more environmental protection, more durability, and sharper. So, what are the effects of different ingredients on straight knives?

Here is the list of contents

1. The role of different components of straight knives

2. Why sharpens knives

The role of the different components of Straight knives

l Because the whole is made of cemented carbide, straight knives’ material composition contains a variety of cemented carbide powder, such as refractory metal compound components WC tungsten carbide, TiC titanium carbide, Ta (Nb)C tantalum carbide, VC vinylidene carbonate, etc., bonded metal components Co cobalt, Ni niobium, Fe iron, etc., they each play a very important role in the comprehensive performance of the straight knives.

l WC tungsten carbide with very good toughness and wear resistance.

l TiC has the characteristics of wear and oxidation resistance and resistance to crescent pits wear, etc. However, TiC and its solid solution are much more brittle than WC, and its alloy toughness is poor. with TiC content over 18%, the alloy is not only brittle but also difficult to weld.

l TaC makes the alloy have better wear resistance, toughness, crescent pits wear resistance, and high-temperature resistance, which means that TaC can improve high-temperature strength, high-temperature hardness, and oxidation resistance. The addition of TaC helps to reduce the coefficient of friction and thus the tool temperature. Its alloy can withstand large impact loads at high cutting-edge temperatures. However, because TaC is extremely expensive, it cannot be used in large quantities and is commonly used to remove hot weld tumors.

l VC in the alloy in addition to doing the main component, but also often added to the alloy as an additive component, its main role is to: reduce the sensitivity of alloy performance to the sintering temperature and time, or, so that the alloy magnetism and hardness qualified sintering temperature and time range increases, inhibit the growth of carbide grains during sintering; change the phase composition, improve the heat resistance of the alloy, additives can make the WC-Co alloy two-phase zone wider, reducing the sensitivity of carbon to the impact of alloy performance; improve the alloy crescent pits wear, reduce tool tumors, improve chip breaking performance, etc.

Why sharpens the knife

Tungsten steel is the most commonly used raw material for Straight knives. Although tungsten steel inserts have sharp edges, high hardness, and high wear resistance, they are always in a high-speed cutting state when cutting. As we all know, the higher the running speed of things it produces the higher the thermal wear faster, and will also produce thermal fatigue of the metal leading to its hardness, hardness reduction of its wear resistance and sharpness will naturally be reduced, thus directly affecting its cutting effect. In addition, the material of the PCB terminals to be cut, steel, stainless steel, copper, zinc, tin, iron, etc. are different, soft, hard, coarse, fine, which will lead to the blade edge in cutting a period of time will naturally blunt not sharp.

Therefore, the tungsten steel blade in the use of a period of time to grind the edge, according to the summary of our more than ten years of experience in the blade, the blade in the grinding edge is best to choose the water grinding method, should try to avoid dry grinding tungsten steel blade, because the water grinding when the water plays a cooling role, to a certain extent can reduce or reduce the tungsten steel blade in the grinding of thermal fatigue, so as to maintain its original characteristics. In order to maximize the wear resistance, sharpness, and long service life of tungsten steel blades, it is recommended to choose the water grinding blade edge as much as possible, in order to achieve the effect of improving production efficiency and reducing production costs.