摘要
针对船舶行业除锈应用需求,开展船用板材激光除锈工艺研究。通过点激光试验,得到如下结果:当激光能量密度达到0.5~5.0J/mm^2时,能够清除钢板表面的锈蚀,清洁度可以达到Sa1/2级;点激光除锈后,钢板表面呈现有规律的沟槽特征;为获得一定数值的粗糙度R_z,需要有一定熔深(沟槽深度);点激光除锈,漆膜的附着力随粗糙度增加而降低,且与粗糙度R_z有一个最佳匹配范围;激光除锈钢板的防腐性能能够与喷砂除锈的指标相当。结果表明,激光除锈的质量及试样的防腐性能满足使用要求。
For the sake of meeting the practical requirements for ship steel plates cleaning,study on the optical fiber laser derusting technology is made by pulsed laser.The result shows that the rust can be thoroughly removed with a surface condition of Sa1/2grade if the laser energy density researches 0.5~5.0J/mm^2.When processing with spot laser light,the typical groove geometry is obtained on the plate surface after being treated.If the specified value of roughness Rzis required,proper laser penetration（or groove depth）is inevitable.The adhesive force of coating will reach a maximum value if the roughness value R_z comes within the optimum range.Anti-corrosion properties of laser derusting samples prove to be the same as those of grit balsting samples.It is proved that laser derusting quality and anticorrosion properties can meet the practical need.
