70 # high carbon steel wire after forming the heat treatment process is hardness to 40 degrees, the temperature needs more than 480 degrees. 45 # just reaches 40 degrees, select the most accurate tempering temperature 480. 70 # steel, slightly higher temperature, if alloy steel need higher.
After proper heat treatment or cold drawing hardening, the high carbon steel wire has high strength and hardness, high elastic limit and fatigue limit (especially notch fatigue limit) , and the cutting performance is acceptable, but the welding performance and cold plastic deformation ability are poor. Because of the high carbon content, water quenching is easy to produce cracks, so the use of double-liquid quenching (water quenching + oil cooling) , small-section parts more use oil quenching. This type of steel is generally used after quenching by moderate tempering or normalizing or surface quenching. Mainly used for manufacturing springs and wear-resistant parts. Carbon tool steel wire is a kind of high carbon steel wire without alloying elements, and it is also a kind of steel with low cost, good cold and hot workability and wide application. Spring steel wire includes high carbon steel wire, high carbon steel wire is one of the spring steel wire. All can do spring can be called spring wire, and high carbon that carbon content high point.
Features: with high strength and hardness, high elastic limit and fatigue limit (especially notch fatigue limit) , cutting performance is acceptable, but poor welding performance and cold plastic deformation ability.
Post time: Mar-14-2024