CAJ | 학술논문

为提高316L 不锈钢材料的激光堆积层硬度，提出了激光超声堆积(LUMD)方法。该方法通过基板的超声振动来改变堆积层晶粒的生长方向和生长速度，达到细化堆积层的晶粒、提高堆积层显微硬度之目的。在理论分析的基础上，通过实验测试了相同工艺参数下堆积层晶粒的大小和硬度。实验结果显示，改变 LUMD 的工艺参数后，堆积层晶粒得到了细化，堆积层的硬度得到了不同程度的提高。研究表明，采用 LUMD 方法可使堆积层的显微硬度得到显著提高。
위제고316L 불수강재료적격광퇴적층경도，제출료격광초성퇴적(LUMD)방법。해방법통과기판적초성진동래개변퇴적층정립적생장방향화생장속도，체도세화퇴적층적정립、제고퇴적층현미경도지목적。재이론분석적기출상，통과실험측시료상동공예삼수하퇴적층정립적대소화경도。실험결과현시，개변 LUMD 적공예삼수후，퇴적층정립득도료세화，퇴적층적경도득도료불동정도적제고。연구표명，채용 LUMD 방법가사퇴적층적현미경도득도현저제고。
To improve the hardness of deposition layer got by LDMD for stainless steel 31 6L,a kind of new deposition method—LUMD was put forward herein to refine the crystalline for increasing the hardness of deposition layer during laser deposition.By analyzing the theory of LUMD,the growth direction and growth velocity of deposition layer crystalline were changed so that the micro-hardness of the laser deposition layer was improved while base board was vibrated supersonically.It is found from experiments microstructure picture that the mechanical behavior of laser deposition layer was in-fluenced because of the base board vibration.It is testified by experiments that the crystalline of depo-sition layer got by LUMD is refine and the hardness of deposition layer is increased while the parame-ters of LUMD are changed.It is also verified that the hardness of deposition layer is improved signifi-cantly when the process parameters in LUMD are selected reasonably.