共查询到18条相似文献,搜索用时 162 毫秒
1.
2.
结合北京北方车辆集团有限公司的甲板加热压型淬火热处理生产线,对整条生产线的自动化系统的组成、结构、功能进行了介绍,着重阐述了生产线中辊底式热处理炉的燃烧系统与自动化系统和整条生产线的控制。 相似文献
3.
对球铁磨球铸后余热淬火及重新加热淬火两种工艺处理后的显微组织、力学性能及使用效果进行了对比研究 ,结果表明 ,重新加热淬火工艺是该磨球工业生产中切实可行的热处理工艺。 相似文献
4.
5.
6.
介绍了立式中频淬火工艺方法及特点,讨论了频率、淬火速度等因素对MC3冷轧工作辊生产工艺的影响,对淬硬层深度进行分析,对常用不同的热处理淬火方式进行比较,证明了立式中频连续淬火的可行性. 相似文献
7.
8.
就工程机械用履带钢23MnB的热处理工艺进行了研究.讨论了淬火温度对23MnB钢性能及组织的影响,以及回火温度对钢机械性能的影响,确定出了23MnB钢合适的热处理工艺制度. 相似文献
9.
10.
27SiMn液压支架管经过调质热处理来实现其良好的综合力学性能.采用四因素三水平的热处理正交试验,研究了不同热处理工艺参数(淬火温度、淬火保温时间、回火温度和回火保温时间)对力学性能的影响,并确定了最优热处理工艺制度为930℃,40 min淬火和480℃,50 min回火.经最优热处理工艺处理后,其力学性能为:屈服强度895 MPa,抗拉强度1030MPa,伸长率15%,断面收缩率54%,冲击功53.3 J,满足了GB/T 17396—1998标准中对27SiMn钢的性能要求. 相似文献
11.
Q&P钢的工艺概念已提出了有些年了,它作为一种热处理工艺,生产的组织具有马氏体和富C的亚稳残余奥氏体.工艺包括:控制淬火形成部分的马氏体,然后热处理以使C从过饱和的马氏体中转移到残余奥氏体中.潜在的应用包括具有好的成型性和抗断裂的高强度钢.应用该工艺可生产薄板和厚板,以及用从长锻材生产热处理元件,甚至于铸铁.自2003年一直在实验室研究,早期的工作结果已有发表.近期的研究主要集中于机理方面的细节.国际范围的独立团队在此研究领域也有很多进展. 相似文献
12.
直接淬火技术在中厚钢板生产中的工业应用 总被引:3,自引:0,他引:3
介绍了直接淬火工艺与离线热处理工艺的区别,概述了直接淬火技术的国内外发展及应用现状。利用450 mm两辊实验轧机及超快速冷却系统对610 MPa级高强钢板进行在线直接淬火试验,并获得良好的综合力学性能。利用光学显微镜和扫描电镜及透射电镜观察试验钢的组织特征并对其组织演变机理进行理论分析。讨论了直接淬火技术在高强度钢减量化制造中的作用及其在中国中厚钢板生产中的应用前景,指出钢铁界同仁应对直接淬火机理、国产装备和新钢种的研究开发等给予必要的重视。 相似文献
13.
WANG Chao WANG Zhao-dong YUAN Guo WANG Dao-yuan WU Jun-ping WANG Guo-dong 《钢铁研究学报(英文版)》2013,20(5):1-05
For plate quenching on a roller quenching machine, heat transfer process is investigated. According to the practical online experiment of plate center temperature, average heat transfer coefficient under different conditions and temperature fields are analyzed by numerical simulation. The results show that, at the water temperature of 15 ℃, the instantaneous maximum quenching cooling rate is 17.6 ℃/s for the plate of 50 mm in thickness in roller quenching process. In the temperature range of 400-850 ℃, the maximum is 12.1 ℃/s. With the plate surface temperature decreasing, surface heat transfer coefficient increases at first, and reaches the maximum value of about 15 000 W/(m~2·K), and then decreases. The calculated heat transfer coefficients are applied to analyze plate temperature field of different thicknesses, and the difference between the calculated and measured temperature is less than 5%. 相似文献
14.
The current efforts in production of low-alloyed steels are aimed at achieving high ultimate and yield strengths,while maintaining sufficient elongation and good weldability in these materials.Among advanced heat treatment processes capable of reaching this goal,there is also the Q-P process (Quenching and Partitioning).The process consists in rapid quenching of the material between the M s and M f temperatures in order to prevent full martensitic transformation.The immediately following heating leads to tempering of the martensite and to diffusion of excess carbon from martensite to retained austenite.This increases the stability of the latter.The aim of the Q-P process is to produce very fine martensite microstructure with retained austenite between martensite plates.The experimental programme was carried out on a high-strength low-alloyed steel containing 0.2% carbon and a higher amount of silicon about 1.5%.Higher silicon content in the microstructure contributes to stabilization of retained austenite by suppressing formation of carbides.This grade of steel is an advantageous material thanks to its low amount of alloying elements.This group of low-alloyed steels,if heat treated or thermomechanically treated in a suitable manner,offers a favourable combination of strength,elongation and toughness.The paper is aimed at possibility of the Q-P process optimization with the use of quenching dilatometer.The experimental material is CMnSiMo steel.Conventional process optimization consists of standard samples treatment in laboratory furnaces and baths.This procedure can be time consuming with higher requirements on the experimental material.Therefore,it was proposed that the Q-P process optimization can be done with the use of quenching dilatometer and in this way the development of new procedures can be accelerated.Q-P processes were conducted in the standard way and with the aid of a dilatometer.Comparison of the obtained results provided by the standard procedure and by the procedure using the quenching dilatomet 相似文献
15.
钢板轧制后直接淬火工艺研究 总被引:2,自引:0,他引:2
钢板轧制后进行在线热处理既省时、节能又可提高钢板质量,这项新技术起源于70年代,现在世界上许多国家已开始采用这项工艺,介绍了在线热处理对淬火设备的要求、冷却方式的选择以及目前存在的问题。 相似文献
16.
17.
介绍了为解决降低钢板淬火水资源浪费,通过开发淬火循环水系统,分析淬火设备控制方法及生产工艺执行操作,节约了水资源,增加了设备的使用效率。 相似文献
18.
φ1098mm车轮热处理工艺的研究 总被引:1,自引:0,他引:1
对大规格的φ1098mm车轮进行了热处理试验,目的是提高车轮横断面硬度值,试验结果表明,采用250s喷水淬火工艺可使轮辋内组织转变完成,增加喷水时间、二次喷水均不能提高硬度,在800℃左右较低温度喷水淬火加强冷却过程提高硬度,且为降低回火温度创造了条件,进一步提高硬度值。 相似文献