High Quality Characteristic Tungsten Carbide Supplier

FOCUS ON TUNGSTEN CARBIDE PRODUCTS DEVELOPMENT/MANUFACTURE/PROCESS

You are here: Home / Technical Supports / Product Knowledge / How Is Hard Alloy Quenched?

How Is Hard Alloy Quenched?

Views: 2     Author: Zhuzhou Jinding Cemented Carbide Co., Ltd     Publish Time: 2024-05-27      Origin: Site


Quenching is a heat treatment process used to harden hard alloys such as steel and other iron-based materials. The process involves the following steps:


1. Heating:

The hard alloy is heated to a high temperature, typically between 800°C and 950°C, depending on the specific alloy. This temperature range ensures that the material reaches its austenitic phase, where its crystal structure becomes face-centered cubic.


2. Rapid Cooling (Quenching):

Once the desired temperature is achieved, the alloy is rapidly cooled by immersing it in a quenching medium. Common quenching media include water, oil, and air. The choice of medium affects the cooling rate and the final properties of the alloy:


Water: Provides the fastest cooling rate, leading to a harder but more brittle material.


Oil: Offers a slower cooling rate than water, reducing the risk of cracking and distortion while still achieving significant hardening.


Air: Used for slower cooling and is typically applied to alloys that are less sensitive to rapid temperature changes.


3. Transformation:

During quenching, the rapid cooling induces a phase transformation from austenite to martensite in steels. Martensite is a very hard and brittle phase that significantly increases the hardness and strength of the alloy.


4. Tempering (Optional):

After quenching, the alloy may undergo tempering to relieve internal stresses and reduce brittleness. Tempering involves reheating the quenched alloy to a lower temperature (150°C to 650°C) and then cooling it again. This step balances the hardness and toughness of the material.


Important Considerations:


Quenching Speed: The speed of quenching must be controlled to prevent thermal shock, which can cause cracks or distortion.


Material Composition: The specific composition of the alloy dictates the exact quenching process parameters, including the heating temperature and cooling medium.


Desired Properties: The choice of quenching medium and subsequent tempering process depends on the required mechanical properties of the final product.




Quick Navigation
Product
About Us
Technical Supports
Get In Touch
 Address: No. B-7, Zhuzhou Auto Parts Industrial Park, No. 9, Zhongda Road, Tianyuan District, Zhuzhou City, Hunan Province, China. 412007
 Phone: 0086-0731-22660738

 Wechat : mayyang789

 Skype: mayyang789
 
 
Copyright © 2020 Zhuzhou Jinding Cemented Carbide Co., Ltd. Technical support :  Leadong