The Influence and Control of Critical Deformation on the Quality of Beryllium Bronze Parts

Beryllium bronze is a hardened dispersion alloy with good comprehensive properties. After high temperature solution treatment, it has high plasticity and is convenient for various complicated forming and rolling. And after low-temperature aging treatment, its hardness, strength elasticity and fatigue limit are greatly improved. Because of its small elastic aftereffect and good electrical and thermal conductivity, wear resistance, non-magnetic and no sparks when impacted, it is Although beryllium bronze is widely used in various elastic connectors and sensitive devices such as mechanical and electrical automatic control, aerospace chemical industry, etc. Although beryllium bronze has good process performance, its cold deformation has obvious effects on the performance and grain size of the product. influences. Generally, the cold-pressing deformation should be strictly controlled within 30%-40%. If the cold-pressing deformation is less than 10% (called critical deformation), the crystal grains will accumulate and grow, the grain size will be uneven, and the performance will be unstable. , Quality defects such as uneven hardness, elasticity and daily deterioration. On the contrary, if the cold pressing deformation is too large, the grains will be obviously refined, the material will become brittle, the grains will be uneven, and the performance will be reduced. This article briefly discusses the quality problems caused by critical deformation in production.