(1.天津市硬質(zhì)合金研究所， 天津 300222 ;2.天津大學(xué)材料科學(xué)與工程系 ,天津 300072;3.天津理工學(xué)院物理系， 天津 300191)
摘 要: 為了進一步提高硬質(zhì)合金的使用性能和探討激光工藝對硬質(zhì)合金的表面作用，敘述了高鈷硬質(zhì)合金激光表面相變硬化淬火工藝參數(shù)，如激光 功率、掃描速度和光斑直徑的選擇， 再通過處理后合金硬度、 矯頑磁力、 抗彎強度等物理力學(xué)性能分析，發(fā)現(xiàn)激光能量密度和合金抗彎強度有一定的關(guān)系，進而找到了合理的激光工藝。通過激光表面相變硬化淬火處理后， YG20硬質(zhì)合金的抗彎強度提高10%以 上， 維氏顯微硬度提高80%， 耐磨性提高1.6倍，使用壽命也有所提高。
關(guān)鍵字: 硬質(zhì)合金 激光 淬火
（1.Tianjin Research Institute of Cemented Carbide, Tianjin 300222, P. R. China;
2.Department of Materials Science and Engineering,Tianjin University, Tianjin 300072, P. R. China;
3.Department of Physics, Tianjin College of Science and Technology, T ianjin 300191, P. R.China）
Abstract:The relationship between the energy density of the laser beam used for surface phase transition hardening quenching and bending strength of the cobalt cemented carbide treated by laser was found by analysing physical and mechanical properties of the cemented carbide treated, and the reasonable laser treatment procedure was found too. After laser quenching, the bending strength, Vickers microhardness and wear-tear resistance of YG20 cemented carbide increase 10%, 80% and 160%, respectively.
Key words: cemented carbide laser quenching
