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Surface finishing of micro mould inserts made of precipitation-hardened steel

机译：沉淀 - 硬化钢制成的微模具表面精加工

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Manufacturing of ceramic and metallic micro components in micro powder injection moulding (μPIM) requires micro mould inserts offering high wear resistance and good surface qualities. Within the frame of this research micro mould inserts made of a precipitation-hardened steel were structured by micro milling, electric discharge machining (EDM) and laser ablation and subsequently finished by abrasive micro peening or ultrasonic wet peening. Roughness and hardness values were determined for the different surface conditions and are discussed and compared on the basis of SEM images. The results reveal that all manufacturing processes can be used for machining of this steel type but each has its own disadvantages and limits. The two finishing processes improve the surface quality, i.e. striation or burr removal after micro milling, surface smoothing or layer removal after EDM. A strategy for the ideal process chain including the manufacturing and finishing process is presented at the end of the paper.
机译：微粉注射成型（μpim）中陶瓷和金属微量成分的制造需要微模插件，提供高耐磨性和良好的表面质量。在该研究的框架内，通过微铣削，电放电加工（EDM）和激光烧蚀构成由沉淀硬化钢制成的微模具，随后通过研磨微喷丸或超声波湿法喷丸来构成。确定不同表面条件的粗糙度和硬度值，并在SEM图像的基础上进行讨论并进行比较。结果表明，所有制造工艺都可用于加工这种钢型，但每个制造工艺都有其自身的缺点和限制。两个精加工过程改善了表面质量，即微铣削后的条纹或毛刺去除，表面平滑或在EDM后去除。在纸张结束时介绍了包括制造和整理过程的理想过程链的策略。

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