为什么不锈钢激光切割建议用氮气切？

摘要：<p style="margin:0pt;"> <span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">为什么</span></span><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">不锈钢</span></span><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">激光切割</span></span><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">建议</span></span><span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">用氮气切？</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">激光切割机在切割钢板或不锈钢等材料时，会用到铺助气体，比如使用氧气作为铺助气体时，会产生放热反应，在切割碳钢时特别明显，这类方案被广泛认知。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">在这一进程中，氧气用于金属表面的激光束投射点，使钢板加热，带来放热反应，使区域温度到达熔点，融化的金属被吹风吹出去，与材料脱离，终究构成一个平滑，带有氧化层的切割表面。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">但另外一方面，切割不锈钢时，由于不锈钢有更高的熔点，其特性也不同，当切割质量和光滑度都计入考核时，由于用氧化作铺助气体时会在金属表面构成残留的氧化物，所以致使切割质量度达不到较好的效果。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">为了解决这个问题，经过激光专家反复研究，*后采取氮气作为了铺助气体，由于氮气是一个吸热的进程，本质上是蒸发，消融的进程，更高的压力意味着更高的运营本钱。</span></span> </p> <p style="margin:0pt;"> <span style="font-family:宋体;font-size:10.5pt;mso-spacerun:"yes";mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0000pt;"><span style="font-family:宋体;">喷嘴直径对气体消耗具有更大的影响，因此切割更厚的材料需要更大的喷嘴，所以切割不锈钢一般都采取氮气作为辅助气体。</span></span> </p>