摘要
研究了镍基超合金激光/电火花打孔再铸层的物理化学特性,并报道了DZ125、ЖC6y、K24、DD3、DD6以及IC10等合金的化学研磨处理对基材腐蚀及其力学性能与热疲劳性能的影响等。实验研究表明:镍基超合金的激光/电火花再铸层有着不同于其本身原始铸态的化学性能,采用适当的化学研磨介质和优化的化学研磨条件可以快速有效地去除再铸层,使孔圆整光滑而不损伤合金基体、不降低基体的力学性能,并且可提高孔的热疲劳性能,由此可望实现镍基超合金涡轮叶片“三无”气膜孔的激光/电火花打孔+化学研磨复合法高效高质量制造。
An experimental investigation on the Physicochemical characteristic of Ni-base superalloy remelt layer generated by laser drilling or electro-discharge machining is described in the paper. The effect of chemical etching on the substrate corrosion of alloys DZ125, ЖC6y, K24, DD3, DD6 and IC10, their mechanics and thermal fatigue performances are also introduced. Test results reveal that the chemical performance of the remelt layer formed by laser drilling or electro-discharge machining changes from the original Ni-base superalloy. The remelt layer will be effectively removed when appropriate chemical liquid and optimized technique are applied. These will generate smooth holes, bring no damage to the substrate, not decrease metal mechanics, and improve the thermal fatigue performance of holes. It is then hopeful to achieve the 'three naught' air film holes on Ni-base superalloy turbine blade drilled with laser or electro-discharge plus chemical etching.
出处
《燃气涡轮试验与研究》
2004年第3期44-50,共7页
Gas Turbine Experiment and Research
