Hardening is a way to make blades harder. The blade heated in a closed chamber range between 860°C and 1100°C. Then the blades rapidly cooling called quenching. Quickly cooling make blades harder and brittle.
The circular saw is used for cutting different types of materials, including dense metals, bricks, and even concrete. The versatile use of the circular saw required its blades harder and durable.
As in regular uses, the circular saw shows very hard, and durable is why people ask, are circular saw blades hardened?
Considering the manufacturing process, the material the blades are made of, and whether hardening is required. If the blades are made of high carbon steel and high-speed steel, there is no need for hardening. But if you use low carbon steel most of the time, commercial manufacturers use low carbon steel and harden the blade’s outer area as it is cost-effective. You also might find bi-metal blades with tough metal body or have brazed teeth.
In this article, we will discuss the benefit and how circular saw blades are hardened?
The Benefits of Circular Saw Blades hardening
The main benefits of hardening are the smoothness of the cutting process and avoiding the blades bending during cutting. Due to the hardness of the blade does not stack in the materials. Even though stack, you can easily take it out without damage to the blade. You can cut any materials without any trouble very precisely and smoothly.
The metallic disc of the blade hardened its tooth by carbide and other tough materials as it can withstand high cutting pressure.
Type of Steel Are Circular Saw Blades Made from
Different type of blade uses a different type of steel depending on its purpose. The best saw that uses high carbon steel is tungsten carbide tipped, used as 1075 Cr1. Another higher crack resistance blades use 80CrV2 to contain chrome vanadium as an addition.
Food grade blade made from 420 stainless steel, also sometimes use 440B. High-Speed Steel is made from Dim05.
Circular Saw Blades Hardening process
The circular saw blade manufacturing process is extraordinarily complex and involves several processes. Hardening is a part of the heat-treatment process. Its materials properties change through the heat treatment process as it can work properly in a different situation.
The steel has been cut proper size and shape. The piece of cut steel then enters a heat chamber with a high-temperature range from 860 to 1100 degrees celsius, which is standard for blade steel hardening. After that, its cool rapidly is called quenching. This process is called hardening. The hardening process increases the hardness of the blade and brittleness. If you keep it as like the blade may shatter during operation. Then the steel blade reheats range 360 to 560 degrees celsius; after that cools slowly at ambient temperature. This process is called tempering to improve the toughness of the blade and increase durability.
After tempering, the blades are straightened, sharpened, polished, and required coating.
Why is hardening necessary?
The objective of hardening is blade can withstand tremendous force and work more powerfully during the cutting process. Without the hardness, blads may have different types of mechanical failure.
Final Talk
In this discussion, we tried to answer the question are circular saw blades hardened? Yes, most of the time its goes through the heat-treatment process. The hardening process makes the blade harder and durable.
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