Heat Treatment Steel: Annealing
The purpose of annealing is to do the opposite of hardening. You anneal metals to relieve stress, soften the metal, increase ductility, and improve their grain structures.
Without an appropriate preheating stage, welding can lead to a metal with uneven temperatures, even molten areas next to areas that are at room temperature. In those circumstances, welding can make the metal weaker: as the weld gets cooler, internal stresses develop alongside hard and brittle spots. Annealing is one way to fix common problems like these and relieve internal stresses.
Heat Treatment Steel: Normalizing
The purpose of normalizing is to remove any internal stresses from heat treatment, machining, forging, forming, welding, or casting. Metal failure can result from uncontrolled stress, so normalizing steel before any hardening can help ensure the success of projects.
Heat Treatment Steel: Hardening
The intent of hardening is not just to harden the steel, but also to make it stronger. Unfortunately, there aren’t just plusses to hardening. While hardening does increase strength, it also decreases ductility, making the metal more brittle. After hardening, you may need to temper the metal to remove some of the brittleness.
Heat Treatment Steel: Tempering
After you harden a metal, whether it’s by the case or flame, and introduce internal stresses after the rapid cooling inherent in the process, steel is often both harder than needed and too brittle. The answer may be to temper the steel to reduce that brittleness and remove or relieve the internal stresses.
ABOUT KEVA
Keva Casting is a professional casting company that focuses on Construction, Machinery, Automobile, Hardware, Pipeline and many other industries.
We provide top quality products with the best service based on our complete production chain including our own mold design, advanced production techniques, and full management of the supply chain. Keva Casting has two factories located in Zhucheng, China's Shandong province.
We use "shell molding", which is a new technique that has been developed in recent years.This new technique has simplified production procedures and reduced air pollution compared with traditional sand casting and investment casting. Shell making and core making are faster to ensure production in enormous quantities. The dimensions and surface finishing are satisfactory for all kinds of industrial requirements. Besides supplying our own formwork & scaffolding systems, our casting products also supply OEM services in various industries.