CAJ | 학술논문

为了解决模具表面龟裂问题，采用激光技术和仿生技术相结合的方法进行修复。利用激光填丝焊修复的方法，在模具试样表面制备修复层，对修复层进行组织观察、硬度分析及X射线能谱分析，得出激光填丝焊修复的最优工艺参数为电流180 A，离焦量－10 mm，激光脉宽8 ms，填丝速度0.032 m／min，并对修复的模具进行热疲劳试验和寿命测试。试验结果表明，利用激光填丝焊修复受损模具，提高模具表面硬度，有效细化组织晶粒，延长模具使用寿命，为压铸模具修复提供一种新的思想。
위료해결모구표면구렬문제，채용격광기술화방생기술상결합적방법진행수복。이용격광전사한수복적방법，재모구시양표면제비수복층，대수복층진행조직관찰、경도분석급X사선능보분석，득출격광전사한수복적최우공예삼수위전류180 A，리초량－10 mm，격광맥관8 ms，전사속도0.032 m／min，병대수복적모구진행열피로시험화수명측시。시험결과표명，이용격광전사한수복수손모구，제고모구표면경도，유효세화조직정립，연장모구사용수명，위압주모구수복제공일충신적사상。
In order to solve the problem of cracks on die-casting dies,the method of combining laser technology and bionic technology was used to repair them.Repairing layer on die-casting dies was prepared utilizing the method of laser wire filling welding;the optimal process parameters were obtained through the microstructure observation,hardness analysis and energy-dispersive X-ray analysis.These parameters were that the current was 1 80 A,the defocusing amount was -10 mm,the laser pulse width was 8 ms,the wire filling speed was 0. 032 m/min,and thermal fatigue test and life test of die-casting dies were performed using these parameters.The experimental results showed that hardness of die-casting dies surface were improved,tissue grain was refined effectively,and the life of mold was extended,which could provide a new thought for repairing the die-casting dies.