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The effect of aging on mechanical properties and microstructure of qbe2.0 beryllium bronze (1)

2021-05-24 02:55:43
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Beryllium copper is a kind of high elastic aluminum alloy with excellent physical properties, technological properties, organic chemical properties and corrosion resistance. It is mainly used for making various high-grade elastic components and electronic components. Beryllium copper is often used as mould steel for precision machinery manufacturing and plastic products. It is also used in the electronic computer of automobile engine control route to detect and operate combustible materials and ignite, so as to reduce the emission standard of organic waste gas and sewage, and can be used in active service at higher temperatures. In addition, beryllium bronze has been widely used in electronic industry, aerospace and instrument equipment industry. With the development of electronic information technology, beryllium bronze is gradually developing towards integration, miniaturization and high reliability. With the increasing demand for beryllium bronze in the field of electronics and electrical appliances, it seems very necessary to study beryllium bronze scientifically.

Beryllium bronze can be divided into soft state (11%), semi hard state (21%) and hard state (37%) according to its deformation after cold rolling. At present, hard and semi-hard beryllium bronze can be used as elastic elements in various space shuttles. The beryllium bronze raw material is required to have superior elastic die, elongation and high compressive strength for the elastic elements developed and designed at present. Therefore, how to improve the comprehensive physical properties of beryllium bronze in these two cases is an important way to expand its application scope. Heat treatment process is a common way to improve the physical properties of the aluminum alloy, especially the grade classification quenching and tempering treatment is very important to improve the physical properties of beryllium bronze.

It is found that after 790 ℃ × 25min heat treatment tempering + 180 ℃ × lh+300℃ × The timeliness of 2 h classification is better than that of 790 ℃ × 25min heat treatment tempering + 300 ℃ × The strength value is stable and the error is small, the mechanism is symmetrical, and the crystal size is 15-20 μ m。 In addition, the fatigue life cycle system test results show that the power switch is 2 × 106 times. It is found that the key to the rapid solidification of beryllium bronze qbe2.0 is saturation α Facies and subtle Island β Phase composition, β The phase distribution is uniform on the substrate. stay α You can find a lot of nanomaterials γ The precipitated phase is formed by the change of temperature. The key reason for the fracture of qbe2.0 beryllium copper alloy bar is that the temperature of the heated part is too high, resulting in the partial damage of the heat treatment process bar, too coarse crystal and low physical properties. It is found that the deformation quenching and tempering process of qbe2.0 beryllium copper is 37% + 290 ℃ after solid melting × 2h。 In the temperature field of 400 ~ 460 ℃, according to the brittle cable specimens, the linear tangent slopes in both forward and reverse directions can be obtained. The gradient direction aging iron wire mainly shows austenite change on the tangent slope of line shape, resulting in the change of in-situ stress range of 130 MPa in the forward and reverse directions. After heat treatment, the kinetic energy digestion and absorption of the specimens in the impact test are improved, and the total damage area is reduced. The larger kinetic energy digestion and absorption was observed in the specimens after grade classification quenching and tempering treatment, just because of the improvement of kinetic energy digestion and absorption, the less total damage area occurred in the specimens after grade classification quenching and tempering treatment, and the larger deformation was observed in the specimens without treatment. In addition, the damage area and deflection value are related to the geometry of the impactor head.

This research is based on the qbe2.0 beryllium copper alloy grade classification quenching and tempering treatment, scientific research grade classification quenching and tempering treatment temperature and time on qbe2.0 beryllium bronze mechanism and characteristics of the harm, clear good grade classification aging processing parameters.



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Address: building 2-D, Qixing science and Technology Innovation Park, 666 Qixing Road, Wuxing District, Huzhou City, Zhejiang Province

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Company Tel: 0572-2176171

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