激光切割430不锈钢板材的工艺

Study on technology of laser cutting 430 stainless steel sheet

针对430铁素体不锈钢切割后热影响区脆化、抗拉强度低等成形质量差的问题,本文以430铁素体不锈钢为实验材料,在辅助气压为0.6 MPa的条件下研究了工艺参数(激光功率、切割速度)对板材切口形貌、热影响区、挂渣量的影响规律。实验结果表明:随着激光功率的增大,切口反面的挂渣量减少,切口宽度增大,热影响区的晶粒有变大趋势;随着切割速度的增加,挂渣量增加,切口宽度减小,热影响区晶粒变大,切口光洁变好,切口的表面质量有所提高。在辅助气压为0.6 MPa的条件下,当激光功率350 W,切割速度0.01 m/s时,切口挂渣量最少、切口宽度质量最佳,微观组织形态较为均匀。

In view of the forming quality problems of embrittlement and low tensile strength within the heat-affected zone(HAZ)of 430 ferritic stainless steel after cutting,the effect of the cutting process parameters on the incision shape,heat affected zone,the impact of the amount of dross were studied under the auxiliary pressure of 0.6 MPa.The experimental results show that the amount of dross on the opposite side of the incision decreases,the width of incision increases and,the grains in the heat affected zone increase with the increase of laser power.the amount of dross increases,cut width decreases,the grain sizes enlarges within the heat affected zone,the surface of the incision becomes better and the incision surface improves with the increase of cutting speed.Under the auxiliary pressure of 0.6 MPa,the laser power of 350Wand the cutting speed of 0.01 m/s,the amount of dross is the least,the width of cut is the best,and the microstructure is more uniform.