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弹簧材料是怎样选择
文章来源:http://www.sdzbthc.com/ 发布时间:2021-11-24 浏览次数:
在低温下使用的弹簧材料,应具有良好的低温韧性。碳素弹簧钢丝、琴钢丝和1Cr18Ni9等奥氏体不锈钢弹簧钢丝、铜合金、镍合金有较好的低温韧性和强度。
Spring materials used at low temperature shall have good low temperature toughness. Austenitic stainless steel spring steel wires such as carbon spring steel wire, piano steel wire and 1Cr18Ni9, copper alloy and nickel alloy have good low temperature toughness and strength.
在低温下,材料的脆性对表面缺陷十分敏感,因此,对材料表面质量应严格要求。
At low temperature, the brittleness of materials is very sensitive to surface defects, so the surface quality of materials should be strictly required.
在低温下,环境介质对材料腐蚀程度比在温室下小得多,而镀镉和镀锌易引起冷脆。
At low temperature, the corrosion degree of environmental medium to materials is much smaller than that in greenhouse, while cadmium plating and zinc plating are easy to cause cold embrittlement.
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在低温下,材料的弹性模量和膨胀系数变化不大,在设计中可以不考虑。
At low temperature, the elastic modulus and expansion coefficient of the material change little, which can not be considered in the design.
弹簧钢制作的弹簧,硬度(即强度)的选用应依据弹簧承载性质和应力大小而定。但是,硬度高低与平面应变断裂韧性关系极大。
For the spring made of spring steel, the hardness (i.e. strength) shall be selected according to the bearing property and stress of the spring. However, the hardness has a great relationship with the plane strain fracture toughness.
随着硬度增加,平面应变断裂韧性(KIC)值显著下降。这就是说在确定弹簧的硬度硬度值时,应本着在满足弹簧特性要求的前提下,弹簧的硬度值偏低一些好。
With the increase of hardness, the plane strain fracture toughness (KIC) decreased significantly. That is to say, when determining the hardness value of the spring, it should be based on the premise of meeting the requirements of spring characteristics, and the hardness value of the spring should be lower.