磷和硼共同加入对GH761合金力学性能的影响  

Effect of Simultaneous Adding of Phosphorus and Boron on Mechanical Properties of GH761 Alloy

作　　者：杨树林[1] 孙文儒[2] 王照坤 张银东 魏志刚[2] 胡壮麒[2] 

机构地区：[1]东北大学,辽宁沈阳110004 [2]中国科学院金属研究所,辽宁沈阳110016 [3]中国一航黎明公司,辽宁沈阳110043

出　　处：《稀有金属材料与工程》2006年第6期929-932,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50271072和50471083)资助

摘　　要：当GH761合金中的硼含量控制在正常值时,将磷含量从0.007%提高到0.023%,合金的650℃/637MPa持久寿命从245h提高到975h,增幅达3倍。保持磷含量为0.023%,将硼含量提高到0.011%或以上时,合金的持久寿命显著降低。在实验含量范围内,磷、硼对合金的室温拉伸和650℃拉伸均无明显影响。磷、硼的最佳控制含量位于0.023%和0.005%附近。分析表明,当硼含量为正常值时,适量提高磷含量有助于改善合金的晶界析出,提高合金的持久性能。当加入适量磷时,进一步提高硼含量,将导致晶界析出过量,降低持久性能。When the boron content was 0.005% and phosphorus content was increased from 0.000 7% to 0.023%, the stress rupture life of GH761 alloy at 650℃ and 637 MPa was increased by 3 times. Keeping the phosphorus content at 0.023% and increasing the boron content to 0.011% or more, the life was greatly decreased. Phosphorus and boron did not exhibit noticeable influence on the tensile properties either at room temperature or at 650℃. The proper content of phosphorus and boron in GH761 alloy should be controlled around 0.023% and 0.005%, respectively. Phosphorus will increase the precipitation ofborides at the grain boundaries, a higher addition of boron would cause the excessive precipitation of borides, which will cause the cohesion of the grain boundaries to decrease the life of the alloy, so the boron content should not be too high when phosphorus and boron are used make microalloying.

关 键 词：磷 硼 GH761合金 交互作用 

分 类 号：TG113.25[金属学及工艺—物理冶金]