综述了近年来国内外切削镍基合金Inconel 718的加工冷却润滑条件的研究进展，通过比较切削力、刀具寿命、切削温度、表面质量、表面粗糙度等几个方面来比较干式切削、微量润滑和低温冷风等条件下镍基合金的切削性能，介绍并比较了各种切削条件的优缺点和各自的适用范围。提出镍基合金Inconel 718等难加工材料的加工方法的发展方向。

The research progress of cutting nickel based alloy Inconel 718 machined cooling and lubrication condition was summarized at home and abroad in recent years.By comparing with the cutting force,cutting temperature, tool life, product surface quality, product surface roughness and so on to compare the cutting performance of nicked based alloy under dry cutting,MQL and cryogenic machining condition was introduced .The advantages and disadvantages of various methods and their applicable scope were compared.The development direction of processing method of difficult machining material like nickel base alloy inconel 718 was put forward.

研究了激光加工工艺参数对选区激光熔化工艺成形的Inconel 718合金试样的致密化行为、显微组织特征、硬度及摩擦磨损性能的影响。结果表明:当激光线能量密度(η)较低时,球化效应的出现使试样的致密度水平较低;在较高的线能量密度与合适的加工参数下,可获得接近完全致密的Inconel 718合金试样。同时,随着激光线能量密度的增加,SLM成形Inconel 718合金试样的显微组织经历了粗大的柱状树枝晶、聚集的枝晶、细长而均匀分布的柱状枝晶等变化过程。在优化工艺参数下,成形试样的显微硬度高达397.8 HV0.2;摩擦系数和磨损率较低,分别为0.40和4.78×10-4mm3/Nm;且试样内部显微组织均匀细小,摩擦试样的表面形成摩擦保护层,使试样的摩擦磨损性能较好。

Influence of the process parameters on densification behavior ,microstructure characteristics,microhardness and wear performance of SLM-processed Inconel 718 alloy samples was studied comprehensively. The result shows that at a lower laser linear energy density (η),the balling effect caused a low densification level. At a higher value of laser energy density with reasonable process parameters,nearly full dense Inconel 718 part was obtained. Besides,as laser energy density increased,microstructures of Inconel 718 parts experienced such changes:coarsened columnar dendrites,clustered dendrites,slender and uniformly distributed columnar dendrites. Samples manufactured at optimized process parameters exhibited high microhardness of 397.8 HV0.2,low mean COF value of 0.40 and low wear rate of 4.78 ×10-4 mm3/Nm. The formation of fine microstructure and the protective tribolayer gave the sample good wear performance.

在已有文献的基础上，利用 Larson-Miller 参数法对700℃超超临界电站候选合金 Inconel 617的持久数据进行了研究。结果表明，Inconel 617合金持久强度的预测精度与LMP建模所用数据关系密切；与利用595~1095℃范围内的所有实验点建模相比，由900℃以下数据外推所得持久强度预测值与参考值/真实值更为一致。进一步对显微组织的研究表明产生上述现象的原因与合金在高温段(900℃及以上)的显微组织，特别是强化相的类型、数量等均发生了明显变化有关。因此，在评估此类合金的持久性能时，应慎用高温区数据，从而降低性能的误估倾向。

According to the data collection and analysis from information published in literatures available, the creep-rupture property of Inconel 617 used in 700℃ ultra supercritical power plant was studied by Larson-Miller parameter method. The results show that the prediction accuracy of long-term rupture strength largely depends on tested data selection. The prediction obtained from data among 595-870℃ has a much better agreement with the reference value compared with the data from 595-1 095℃. Further investigation indicates that the differences of predicted values are closely associated with the microstructure distinction, especially with the evolution of strengthening phases (including gamma prime and M23C6) in the temperature range discussed. Therefore, when assessing creep-rupture property for such kind of alloy, creep data from high temperature region should be used carefully to reduce the trend of over/under estimation.

为了研究采用ERNiCrMo-3焊丝焊接F65/316L与X65/Inconel625复合管焊接接头在特殊油气田气体中的耐腐蚀性能，参照ASTM G39、ASTM 71和 DNV-OS-F101标准对复合管焊接接头进行了CO2应力腐蚀试验、高温高压CO2腐蚀、电偶腐蚀性能测试，考察了腐蚀试样表面形貌和成分。结果表明，复合管焊接接头经四点弯曲抗CO2应力腐蚀在母材和焊缝处均未出现裂纹，腐蚀速率满足标准要求；高温高压CO2腐蚀速率为0．002 mm/a，腐蚀类型为均匀腐蚀，腐蚀程度为轻度腐蚀；在3．5％NaCl溶液环境中，电偶腐蚀试验结果表明，焊缝的失重率大于316L和Inconel625母材，其耐蚀性与母材相当。

Corrosion behavior of the welded joints of F 65/316L and X65/Inconel625 clad pipes which were welded with ERNi-CrMo-3 filler metal, were studied in this paper .According to ASTM G39, ASTM 71 and DNV-OS-F101standards, CO2 stress cor-rosion test, high-temperature and high-pressure CO2 corrosion test as well as the galvanic couple corrosion test were performed on the welded joints , respectively .The morphology and composition of the corrosion samples were analyzed .The results show that no crack appear after CO2 stress corrosion, and the mass loss is also qualified.The high-temperature and high-pressure CO2 corrosion is uniform and mild, and the corrosion rate is 0.002 mm/a.The galvanic couple corrosion test shows that the weld is of good corro-sion resistance in 3.5%NaCl solution.

混合式气体发生器在汽车、航空、航海、军工等领域有着广泛应用,而我国对混合式气体发生器技术研究尚处于起步阶段。因此,研究开发混合式气体发生器产品并拓展其应用领域,具有重要理论和现实意义。针对混合式气体发生器的关键技术之一——爆破膜破裂压力的一致性,建立了力学模型,分析了爆破压力的影响因素,并应用SolidWorks COSMOSXpress分析了爆破膜的应力和位移分布,针对理论分析设计了实验方案,获得了较好的实验数据,使用材料inconel600、厚度0.3 mm、直径21.5 mm平面圆片状爆破膜,测得爆破压力为44 MPa,证实了理论分析的正确性。

A hybrid inflator has a wide range of applications in automobiles , aviation, navigation, and arms industry.However, the research of the hybrid inflator technology is still at the initial stage in China .Therefore, it has importanttheoretical and practical significance for the research and development of hybrid inflators .Aiming at burstingpressure uniformity of the rupture disk, which is the key technology to the hybrid inflator , the mechanical modelwas founded and the influencing factors of the bursting pressure were analyzed .The rupture disk stress and displacementdistribution were analyzed with SolidWorks COSMOSXpress .The experiment was designed according to theo -retical analysis, and better experimental data was obtained.Using the material of inconel 600, with thickness of 0.3mm and diameter 21.5 mm, the rupture pressure was tested to be 44 MPa, proving accuracy of the theoretical analysis.