Internal Intensive Quenching: Optimal Heat Treatment for inaccessible component areas

内部强化淬火:对难以接近的部件区域进行最佳热处理

基本信息

项目摘要

In the course of this project a method to increase the life time of hydraulic components under an interior high pressure loading is developed. Such components find intensive usage in modern fuel-injection systems and have to withstand a cyclic pressure up to 4000 bar. To further increase the efficiency of such components there is a trend towards higher pressures in future systems while at the same time the components advance to more and more filigree structures due to the overall vehicle mass reduction. To sustain those changes in applied pressure with an equal component life time the properties of the base material have to be tailored during the production process towards an optimal microstructure. Recent methods for the local strain hardening of bore walls like drifting or autofrettage are based on the introduction of compressive residual stresses and if applicable small strain hardening effects in the bore hole wall. Compared to thermal methods the impact of these mechanisms on the component lifetime is very limited. On the other side most of the established thermal methods, e. g. case hardening, have difficulties with small bore diameters due to the restricted accessibility of the targeted areas. Therefore in this project the focus is directed towards the control and modification of the microstructure, residual stresses and strain hardening in a modified intensive quenching process based on martensitic hardening. The development of this process includes the efficient inductive heating of the part to austenization temperature followed by a local quenching with a high pressure water-air mixture to achieve an optimal near surface state of the bore hole. The newly developed process should first be tested on simple through-holes and then be transferred on more application oriented drilling intersections.
在这个项目的过程中,开发了一种方法,以增加内部高压负载下的液压元件的寿命。这些部件在现代燃料喷射系统中得到广泛使用,并且必须承受高达4000 bar的循环压力。为了进一步提高这些部件的效率,在未来的系统中存在朝向更高压力的趋势,而同时由于整体车辆质量的减小,这些部件前进到越来越多的细丝结构。为了在相同的部件使用寿命下维持施加压力的这些变化,必须在生产过程中针对最佳微观结构定制基础材料的特性。用于钻孔壁局部应变硬化的最新方法(如通径或自增强)是基于在钻孔壁中引入压缩残余应力和(如果适用的话)小应变硬化效应。与热方法相比,这些机制对部件寿命的影响非常有限。另一方面,大多数已建立的热方法,例如。G.由于目标区域的可及性受到限制,表面硬化处理在处理小孔径时遇到困难。因此,在本项目中,重点是在基于马氏体硬化的改进型强化淬火工艺中对微观结构、残余应力和应变硬化进行控制和改进。该工艺的开发包括将零件有效感应加热至淬火温度,然后使用高压水-空气混合物进行局部淬火,以实现钻孔的最佳近表面状态。新开发的工艺应首先在简单的通孔上进行测试,然后转移到更面向应用的钻孔交叉点上。

项目成果

期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Experimental investigation and finite-element modeling of the short-time induction quench-and-temper process of AISI 4140
AISI 4140 短时感应淬火回火工艺的实验研究和有限元建模
A Comparative Study of Kinetic Models Regarding Bainitic Transformation Behavior in Carburized Case Hardening Steel 20MnCr5
  • DOI:
    10.1007/s11661-018-5004-6
  • 发表时间:
    2018-11
  • 期刊:
  • 影响因子:
    0
  • 作者:
    J. Damon;F. Mühl;S. Dietrich;V. Schulze
  • 通讯作者:
    J. Damon;F. Mühl;S. Dietrich;V. Schulze
Internal Quenching: Ideal Heat Treatment for Difficult to Access Component Sections
内部淬火:针对难以接近的部件部分的理想热处理
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Professor Dr.-Ing. Volker Schulze其他文献

Professor Dr.-Ing. Volker Schulze的其他文献

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{{ truncateString('Professor Dr.-Ing. Volker Schulze', 18)}}的其他基金

T-TRIP: Investigation of transformation induced plasticity during precipitation formation in quenched and tempered steels and maraging steels
T-TRIP:调质钢和马氏体时效钢沉淀形成过程中相变诱发塑性的研究
  • 批准号:
    428958028
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Optimized wobble milling to increase process efficiency and machining quality when machining CFRP
优化的摆铣可提高加工 CFRP 时的工艺效率和加工质量
  • 批准号:
    413574937
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants (Transfer Project)
Manufacturing of optimized technical surfaces through a process combination of stream finishing and laser ablation
通过流精加工和激光烧蚀的工艺组合制造优化的技术表面
  • 批准号:
    395790598
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development and optimization of the hard gear skiving in the productive dual-flank-cutting for gearings
齿轮高效双侧面切削中硬齿面车削的开发和优化
  • 批准号:
    269000193
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development of the peening processes micropeening and ultrasonic wet peening to work hardening
开发微喷丸和超声波湿喷丸加工硬化喷丸工艺
  • 批准号:
    240450756
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Simulationsgestützte Verminderung der Werkzeugbelastung beim Schneideneintrittstroß mit dem Ziel der Standzeitsteigerung
通过仿真支持减少切削刃入口流动期间的刀具负载,以延长使用寿命
  • 批准号:
    209241696
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Innovative Prozessstrategien zur mechanischen Bohrbearbeitung faserverstärkter Kunststoffe unter gezielter Richtung der Prozesskräfte ins Werkstückinnere
用于纤维增强塑料机械钻孔的创新工艺策略,将加工力定向到工件内部
  • 批准号:
    172945473
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Development of a combined simulation-model for the prediction of process- and machine-induced deviations of surface areas in broaching
开发组合仿真模型,用于预测拉削过程中工艺和机器引起的表面区域偏差
  • 批准号:
    165937581
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Analysis of the heat input into the workpiece due to drilling and the resulting influences on the wall of the hole for 42CrMo4
分析 42CrMo4 钻孔时工件的热输入及其对孔壁的影响
  • 批准号:
    179125425
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Optimierung des Wälzschälverfahrens durch Modellierung der Kinematik und der Spanbildung mittels FE-Simulation
使用有限元模拟对运动学和切屑形成进行建模,优化车削工艺
  • 批准号:
    131685847
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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