信息报导

1 模具材料及热处理技术的发展 本文对模具热处理工艺进行分析,充分挖掘模具材料和强韧化及表面强化处理工艺。如细化碳化物,改进预处理工艺,模具的“低温”淬火、模具的“高温”淬火、模具的“中温”回火,真空热处理、模具淬火、回火快速冷却。以便更有效地提高模具使用寿命。     

4Cr5MoSiV1钢挤压模具真空热处理工艺研究

分析了不同真空热处理制度对４Ｃｒ５ＭｏＳｉＶ１模具钢的室温硬度、常规力学性能、高温硬度、高温力学性能及特种性能的影响。用透射电镜、扫描是和光学显微镜等分析了该材料经不同真空热处理后的显微组织的热磨损、热疲劳的表面形貌,从而优选中理的真空热处理工艺,经工业性生产试验表明,用优选的真空热处理工艺处理的挤压模具,综合性能好,组织均匀致密,耐磨性和热疲劳抗国高,变形小,无氧化脱碳,模具使用寿命较热处理提高     

热挤压工模具真空热处理缺陷及预防对策

叙述了热挤压工模具的真空热处理缺陷,通过改进措施,提高了工模具质量,降低了生产成本。     

4Cr5MoSiV10钢热挤模真空渗氮工艺试验研究

分析了4Cr5MoSiV1热挤模经低真空氮化的渗层组织及其显微硬度分布、工艺运行特点及其生产应用情况，以期推动真空渗氮工艺在我国铝挤压模具的推广应用，提高铝型材热挤压模使用寿命，并实现绿色热处理的目标。     

热挤压模具的真空热处理技术

一、真空热处理的特点及发展方向为了防止模具在热处理时的表面氧化、脱碳和增碳,以往主要采用盐浴或箱式炉保护加热,近年来也开始采用可控气氛加热。在高温加热时,要想使气体介质、保护剂或盐浴,在全部加热过程中一直保持中性,以防止它们和金属发生反应是比较困难的。但用氩、氮等惰性气体,虽然可达到目的,但由于成本太高而难于推广。真空则可作为理想的加热介质来处理模具。模具在真空中加热好后,将中性气体通入炉内的冷却室中     

玻璃珠压制模具开裂分析

针对某玻璃珠压制模具在使用过程中出现纵向裂纹问题,采用断口分析、化学成分分析和金相检验等方法分析了开裂原因。认为,真空油淬出现高温渗碳是引起模具纵向开裂的主要原因。采用真空高压气淬,淬火温度1 080℃,550℃回火热处理工艺后,未发生纵向开裂现象。     

4Cr5MoSiV1 钢热挤模真空渗氮工艺试验研究

分析了4Cr5MoSiV1钢热挤模经低真空氮化的渗层组织及其显微硬度分布、工艺运行特点及其生产应用情况,以期推动真空渗氮工艺在我国铝挤压模具的推广应用,提高铝型材热挤压模使用寿命,并实现绿色热处理的目标。     

真空热处理的发展及展望

本文讲述了真空热处理的发展，重点是热处理系统的改进，气体流淬火和低压渗碳的发展，说明了真空热处理在21世纪的发展趋势。     

提高铝型材模具寿命的途径

在生产实践的基础上，对型材模具选材及热处理工艺进行了较系统的分析和总结。提出了模具的材质及热处理工艺选择是影响模具寿命的重要因素。     

沈阳新光模具制造公司

沈阳新光模具制造公司是航天工业总公司直属企业,总经理赵云路是辽宁省科技专家服务中心模具工程部专家,是《锻压技术》及《铝加工》联合体董事会副董事长.该公司拥有精密加工中心、真空热处理设备,具有40余年生产宇航产品工模具的丰富经验,技术力量雄厚,具备研制、开发高档次工模具的实力.该公司与沈阳北方模具制造公司共同研制开发的铝型材挤压筒、挤压     

提高粉末冶金压模寿命的方案

本文论述了延长粉末冶金压模寿命的两种方案———改进热处理工艺和选用新材料。以Cr12型钢为例,改进传统的热处理工艺,能够改善材料的性能,从而延长模具的使用寿命。     

Heat Treatment of Die and Mould Oriented Concurrent Design

Traditional die and mould design, mainly by ex-perience or semi-experience ,is isolated from manu-facturing process .Before the designis finalized,thescheme of die and mouldis usually modifiedti me andagain, thus some disadvantages come into being,such as long development period,high cost and un-certain practical effect . Due to strong desires forprecision,service life ,development period and cost ,modern die and mould should be designed and manu-factured perfectly . Therefore more and more ad…     

粉末冶金齿毂模具裂纹分析与解决方法

从压制阴模模具材料、热处理制度、金相组织等方面研究了粉末冶金压制阴模键子处裂纹形成原因,讨论了粉末冶金齿毂模结构及压制模具设计结构的合理性,通过分析数据得到了开裂的原因并加以改正。结果表明,压制阴模本身的材质选择和热处理制度没有问题,导致裂纹产生的主要原因是整体模具结构设计不合理,导致压制阴模键子损坏。改进原有模具结构可以提高压制模具寿命,降低模具使用成本,保证生产顺利进行。     

Strengthening and toughening treatment of steel used as the material of multistation progressive dies

The Cr12MoV steel was chosen as the material of multistation progressive dies, and its impact toughness and hardness were measured, following different heat treatments. Based on experimental results, a practical technology carried out in vacuum is recommended as the strengthening and toughening treatment for these dies: 980°C oil pre-quenching, oil quenching again at 980°C, final tempering at 200°C for 1 hour, and then air cooling. This treatment makes the steel have fine austenitic grains and carbide particles, and thus leads to good combination of strength and toughness such that the service life of the dies is increased.     

C—N共渗在耐材模具制造中的应用

C-N共渗热处理工艺应用在耐火材料制品模具制造中,提高了模具的耐用度,降低了产品成本。     

辊式拉拔模用于连续拉拔机组的新技术

针对进口连续拉拔机组，独创设计了可配套使用的二连式辊模，并首次很好地解决了惯用模在辊模后的安装问题，是一种很有前途的新技术。     

Reindustrialization principles in the heat treatment of die steels

The reindustrialization of production is considered. As an example, a working model is developed for the heat-treatment equipment used in the production of dies made from special steels. In reindustrialization, productive capacity that has been lost or has grown outdated during deindustrialization must be restored or modernized. Heat treatment is of particular importance since it is part of the manufacture and restoration of most tools. Modern Russian equipment permits high-quality heat treatment of many special steels so as to ensure the required mechanical properties. All the basic groups of die steels are considered in terms of their performance: steel of increased wear resistance; secondary-hardening crumple-resistant steel; steel with elevated impact strength; steel of moderate thermostability and high ductility; steel of elevated thermostability and ductility; and steel of high thermostability. The requirements on the properties of these groups are analyzed, and possible means of attaining those properties by heat treatment are identified. By comparing the specific purpose of die steels, their required properties, and the possible means of attaining those properties by heat treatment, the appropriate equipment is chosen. Modern Russian equipment permits high-quality heat treatment of die steels so as to ensure the required mechanical properties. At present, it is important to create production systems that incorporate the vast wealth of Russian specialists’ accumulated experience and the best available technologies. This is a very complex problem, in both engineering and economic terms.     

FE–Analysis of Simultaneous Hot/Cold Forging

A new, highly innovative manufacturing method is under development in research and industry, where the workpiece undergoes simultaneously a hot and a cold forging process followed by press hardening directly in the forging dies. Such a high complex forging technology is simulated by means of the finite element method, where the inductive electrical heating is modelled with substitute sources for the heat production besides the forming and the cooling process with thermal deformation and eigenstress evolution. The measured data for the temperature field and the final geometry of the forging test are compared to the results of the simulation, showing a very good agreement.     

两连式辊模拔制合金钢棒材理论与实践

通过实验分析了辊拔合金钢棒材的优缺点及其变形特点，运动学特点和力参数，指出辊模拔制合金钢棒材比辊拔丝更能发挥其优越性，并提出了辊模和固定模串联组合的新工艺。