Cutting Properties of Austenitic Stainless Steel by Using Laser Cutting Process without Assist Gas

Advances in Optical Technologies Pub Date : 2012-10-02 DOI:10.1155/2012/234321

H. Ozaki, Y. Koike, H. Kawakami, J. Suzuki

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引用次数: 5

Abstract

Recently, laser cutting is used in many industries. Generally, in laser cutting of metallic materials, suitable assist gas and its nozzle are needed to remove the molten metal. However, because of the gas nozzle should be set closer to the surface of a workpiece, existence of the nozzle seems to prevent laser cutting from being used flexible. Therefore, the new cutting process, Assist Gas Free laser cutting or AGF laser cutting, has been developed. In this process, the pressure at the bottom side of a workpiece is reduced by a vacuum pump, and the molten metal can be removed by the air flow caused by the pressure difference between both sides of the specimen. In this study, cutting properties of austenitic stainless steel by using AGF laser cutting with 2 kW CO2 laser were investigated. Laser power and cutting speed were varied in order to study the effect of these parameters on cutting properties. As a result, austenitic stainless steel could be cut with dross-free by AGF laser cutting. When laser power was 2.0 kW, cutting speed could be increased up to 100 mm/s, and kerf width at specimen surface was 0.28 mm.

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无辅助气体激光切割奥氏体不锈钢的切削性能

近年来，激光切割在许多行业中得到了应用。在金属材料的激光切割中，通常需要适当的辅助气体及其喷嘴来去除熔融金属。然而，由于气体喷嘴应该设置更接近工件表面，喷嘴的存在似乎阻碍了激光切割的灵活使用。因此，新的切割工艺，辅助无气体激光切割或AGF激光切割，已经开发出来。在此过程中，通过真空泵降低工件底部侧的压力，并通过试样两侧压力差引起的气流将熔融金属除去。研究了2 kW CO2激光AGF对奥氏体不锈钢的切割性能。通过改变激光功率和切割速度，研究了这些参数对切割性能的影响。结果表明，AGF激光切割可以实现对奥氏体不锈钢的无杂质切割。当激光功率为2.0 kW时，切割速度可达100 mm/s，试样表面切口宽度为0.28 mm。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Advances in Optical Technologies

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