Why is the metal to be heat treated? Quenching refers to a metal heat treatment process in which a metal workpiece is heated to a suitable temperature for a period of time and then immersed in a quenching medium for rapid cooling. The purpose of quenching is to improve hardness, strength and wear resistance to meet the performance of the parts. Why is the metal to be heat treated?
Quenching refers to a metal heat treatment process in which a metal workpiece is heated to a suitable temperature for a period of time and then immersed in a quenching medium for rapid cooling. The purpose of quenching is to improve hardness, strength and wear resistance to meet the performance of the parts. Quenching process is the most widely used, such as: tools, measuring tools, molds, fasteners, nuts, hardware parts, bearings, springs and automobiles, tractors, diesel engines, cutting machine tools, pneumatic tools, drilling machinery, agricultural machinery, petroleum machinery, The quenching process is used for parts such as chemical machinery, textile machinery, and aircraft. The medium used for quenching the workpiece is called quenching cooling medium (or quenching medium).
What are the commonly used quenching media?
Water, aqueous solution, mineral oil, molten salt, molten alkali, etc., there will be some differences in the composition and content of quenching liquids of different brands. The water-soluble quenching liquid contains a special organic polymer which can be dissolved in water, adjusts the concentration and temperature of the solution as needed, and is formulated into a quenching liquid whose cooling performance can meet the requirements. The cooling rate in the high temperature stage is close to that of water, and the cooling rate in the low temperature stage. Close to oil. The advantages are non-toxic, smokeless, odorless, non-corrosive, non-combustible, anti-aging, safe and reliable to use, good cooling performance, adjustable cooling rate, wide application range, uniform hardening of the workpiece, and significant reduction of deformation and cracking. The tendency, therefore, can improve the quality of the workpiece, improve the working environment and working conditions, and bring energy, environmental, technical and economic benefits to the factory. In actual use, in order to obtain quenching cooling rate similar to oil, the concentration range is generally 8-20%, and most of them are used in the range of 15-20%.
How is the concentration of quenching liquid controlled?
1. Before the new quenching agent is prepared, the quenching tank is cleaned first, and the required quenching liquid stock is calculated according to the volume of the quenching liquid tank and the recommended concentration of the quenching liquid;
2. Then inject a clean volume of clean water into a clean plastic bucket;
3. Slowly stir the water in the plastic bucket with a stir bar to form a vortex, then slowly inject the quenching liquid solution;
4. Pour the prepared quenching liquid into the liquid tank of the quenching liquid;
5. After the liquid level in the quenching agent tank reaches the required liquid level, the machine tool circulating quenching liquid is turned on;
6. Chuyi online quenching liquid concentration meter is a complete module that can be used together with pipelines, liquid mixing equipment or cleaning equipment circulating in the quenching liquid of the manufacturing workshop. It can continuously monitor the quenching liquid concentration ([Brix] 0.0 to 78.0%, measurement Accuracy ±0.2%). Real-time monitoring, data is refreshed every second to ensure that every data change is not missed. Signal data can be connected to the PLC for easy automation.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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