刮板运输机中部槽槽帮材料及热处理工艺的研究

发布时间：2018-05-08 06:22

  本文选题：调质处理 + 淬火-碳分配　； 参考：《沈阳理工大学》2015年硕士论文

【摘要】：刮板运输机是煤炭企业重要的运输设备,中部槽是其重要的组成部分。由于中部槽槽帮是中部槽主要受力部位,其正常与否直接影响了刮板运输机的正常运转。本文针对刮板运输机中部槽槽帮易磨损、易腐蚀等缺点进行改善。主要从化学成分和热处理工艺角度,对槽帮材料进行研究,希望通过合理的成分配比和热处理工艺来进一步提高槽帮材料的力学性能和焊接性能。本文是在ZG30Si Mn的基础上,通过减少含碳量,添加一定量的合金元素(Cr、Mo、V及稀土),通过不同的热处理工艺(调质、正火、Q-P、Q-P-T),以期提高槽帮材料的耐磨性和焊接性。通过对不同方案的对比,实验得出如下结论:(1)Cr、Mo、V合金元素对铸钢材料有一定的强化作用;(2)经调质处理的五种铸钢材料,其中ZG26Si Mn Mo V在920℃淬火+580℃回火时力学性能最好,强度达到1000MPa以上,伸长率18%以上,常温下的冲击功也达到了40J以上;(3)添加稀土材料的铸钢经调质处理和正火处理以后,强度和硬度都有了一定程度的提高,但塑性和韧性相对有所降低。由于组织和断口分析发现夹杂物,是导致铸钢材料变脆的主要原因;(4)经Q-P和Q-P-T工艺处理后,铸钢材料的性能未达到预期的提高,强度和硬度相对有所提升,但塑韧性偏低,主要是由于Si或Al的含量未达到一定的水平,导致未能充分的抑制Fe3C的析出和形成稳定的碳化物;(5)合金元素的添加不利于铸钢材料的焊接性,几种铸钢材料中,ZG26Si Mn的焊接性最好。本文针对刮板运输机中部槽槽帮材料的化学成分和热处理工艺进行研究,进一步提高了槽帮材料的力学性能和焊接性能,从而进一步提高了刮板运输机的生产效率。
[Abstract]:Scraper conveyer is an important transportation equipment in coal enterprises, and the middle slot is an important part of it. Because the middle slot side is the main force position of the middle slot, its normal or not directly affects the normal operation of the scraper conveyer. This paper aims at improving the wear and corrosion of the middle slot of scraper conveyer. From the angle of chemical composition and heat treatment technology, this paper studies the groove top material, and hopes to improve the mechanical properties and welding properties of the groove top material by reasonable composition ratio and heat treatment process. In this paper, on the basis of ZG30Si mn, by reducing the carbon content, adding a certain amount of alloying elements such as Cr-MoV and rare-earth elements, and through different heat treatment processes (tempering, normalizing, Q-PQ-PQ-P-T), we hope to improve the wear resistance and weldability of grooves. Through the comparison of different schemes, the following conclusion is drawn from the experiment: the alloy element of 1: 1 Cr-MoV alloy has a certain strengthening effect on cast steel materials, and five kinds of cast steel materials treated by tempering and tempering have the best mechanical properties when ZG26Si Mn Mo V is quenched at 920 鈩，

本文编号：1860305