液压立柱27SiMn冷拔柱管热处理材料性能及应用分析

Performance and Application Analysis of 27SiMn Cold drawn Column Tube Material Used for Hydraulic Column after Heat Treatment

  • 摘要: 针对液压支架立柱制造中存在的材料利用率低(≤85%)、加工周期长等行业痛点,本文提出基于27SiMn高精度冷拔柱管的材料性能及应用分析。通过系统对比先冷拔后调质(工艺A)与先调质后冷拔(工艺B)的显微组织演变规律,结合霍尔-佩奇效应与位错强化理论揭示性能差异机制。试验表明:工艺A获得均匀回火索氏体,其塑性和韧性优于工艺B,但强度低于工艺B,材料综合力学性能更均衡;通过实际应用冷拔柱管,验证了加工余量可以从10mm减少至5mm,其加工效率和材料利用率均分别提高了69.3%和10.1%。

     

    Abstract: Addressing the industry pain points of low material utilization rate (≤85%) and long processing cycle in the manufacturing of hydraulic support columns, this article proposes an analysis of the material properties and applications based on 27SiMn high-precision cold-drawn column tubes.By systematically comparing the microstructural evolution laws of cold-drawn tubes produced by two different processes, namely, cold-drawing followed by tempering (Process A) and tempering followed by cold-drawing (Process B), and incorporating the Hall-Petch effect and dislocation strengthening theory, the mechanism behind the performance differences was revealed.The test results indicate that the cold-drawn tubes produced by Process A exhibit a uniform tempered sorbite structure, with superior plasticity and toughness compared to those produced by Process B. However, their strength is lower than that of the cold-drawn tubes produced by Process B, resulting in a more balanced overall mechanical performance of the material;Through practical application of cold-drawn tubes, it was verified that the machining allowance could be reduced from 10mm to 5mm, resulting in an increase in machining efficiency and material utilization rate of 69.3% and 10.1%, respectively.

     

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