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弹簧钢及五金弹簧材料的加强处理
文章来源:http://www.sdzbthc.com/ 发布时间:2021-11-24 浏览次数:
弹簧钢按其加工成型方式分为热成型和冷成型两类,由于加工方式的不同,在后续的热处理方式也不尽相同,具体如下:
Spring steel is divided into hot forming and cold forming according to its processing and forming methods. Due to different processing methods, the subsequent heat treatment methods are also different, as follows:
热成型弹簧的热处理
Heat treatment of hot formed spring
直径或板厚大于10-15mm的大型弹簧件,多用热轧盘条拉拔的钢丝或钢板制成。
Large spring parts with diameter or plate thickness greater than 10-15mm are mostly made of steel wire or steel plate drawn by hot-rolled wire rod.
加工及热处理为:先把弹簧钢丝加热到高于正常淬火温度50-80℃的条件下热卷成型,然后淬火+中温回火,获得弹性极限和疲劳强度极佳的回火索氏体。弹簧钢淬火加热应选用少氧或无氧化的设备如盐浴炉、保护气氛炉等,防止氧化脱碳。
Processing and heat treatment: first heat the spring steel wire to 50-80 ℃ higher than the normal quenching temperature for hot coil forming, and then quenching + medium temperature tempering to obtain tempered sorbite with excellent elastic limit and fatigue strength. For quenching and heating of spring steel, equipment with less oxygen or no oxidation, such as salt bath furnace and protective atmosphere furnace, shall be selected to prevent oxidative decarburization.
山东弹簧厂
弹簧钢热处理后还要进行喷丸处理,强化表面,产生残余压应力,提高疲劳强度。
After heat treatment, spring steel should be shot peened to strengthen the surface, produce residual compressive stress and improve fatigue strength.
热轧弹簧钢采用的工艺流程为:扁钢剪断加热压弯成形后余热淬火+中温回火+喷丸包装。
The process flow of hot-rolled spring steel is: waste heat quenching + medium temperature tempering + shot peening packaging after flat steel cutting, heating, bending and forming.
冷成型弹簧的热处理
Heat treatment of cold formed spring
直径小于8mm的弹簧件,常用冷拔钢丝冷卷成形。冷拉钢丝制造工艺及后续热处理,主要是以下三类:
Spring parts with diameter less than 8mm are usually formed by cold rolling of cold drawn steel wire. The manufacturing process and subsequent heat treatment of cold drawn steel wire mainly include the following three categories:
铅浴处理冷拉钢丝
Lead bath treated cold drawn steel wire
先将钢丝连续拉拔三次,总变形量达到50%,接着加热到ac3以上温度使其奥氏体化,随后在450-550℃的铅浴中等温处理,奥氏体转化为索氏体组织。屈服强度为1600mpa,冷卷成形后,在200-300℃退火消除应力即可。东莞弹簧
Firstly, the steel wire is drawn continuously for three times, and the total deformation reaches 50%. Then it is heated to the temperature above AC3 to austenitize it. Then it is isothermal treated in a lead bath at 450-550 ℃, and the austenite is transformed into sorbite structure. The yield strength is 1600 MPa. After cold roll forming, annealing at 200-300 ℃ can eliminate the stress. Dongguan spring
退火状态钢丝
Annealed steel wire
将钢丝拉拔到规定尺寸,再进行退火处理。软化后的钢丝冷卷成形后,需经过淬火+中温回火后才能获得所需的力学性能。
The steel wire shall be drawn to the specified size and then annealed. After the softened steel wire is cold rolled, the required mechanical properties can be obtained only after quenching + medium temperature tempering.
油淬火回火钢丝
Oil quenched tempered steel wire
钢丝拉拔到处理尺寸后,进行油淬火回火。这类钢丝的强度不如铅浴处理的钢丝,但性能均匀一致,成本较低。冷卷成形后,进行去应力处理。
After the steel wire is drawn to the treatment size, it shall be oil quenched and tempered. The strength of this kind of steel wire is not as good as that of lead bath treated steel wire, but its performance is uniform and the cost is low. After cold roll forming, stress relief treatment shall be carried out.
以上就是山东弹簧厂为您提供的精彩内容,更多的精彩内容请点击我们的网站http://www.sdzbthc.com
The above is the wonderful content provided by Shandong spring factory. For more wonderful content, please click our website http://www.sdzbthc.com