Effect of Element B on Mechanical Properties of High W,Cr Nickel-base Superalloy

Qu Dianpeng; Liu Jiasheng; Gu Xin; Wang Yufei; Man Yanlin; Cong Jian; Yu Xingfu

doi:10.15980/j.tzzz.2015.07.033

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Effect of Element B on Mechanical Properties of High W,Cr Nickel-base Superalloy
Vol. 35, Issue 7, Pages: 779-781(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.07.033

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[1]曲殿鹏,刘家胜,顾欣,王宇飞,满延林,丛健,于兴福.微量元素B对高W、Cr镍基高温合金性能的影响[J].特种铸造及有色合金,2015,35(07):779-781.

Qu Dianpeng, Liu Jiasheng, Gu Xin, et al. Effect of Element B on Mechanical Properties of High W,Cr Nickel-base Superalloy. [J]. Special Casting & Nonferrous Alloys 35(7):779-781(2015)
[1]曲殿鹏,刘家胜,顾欣,王宇飞,满延林,丛健,于兴福.微量元素B对高W、Cr镍基高温合金性能的影响[J].特种铸造及有色合金,2015,35(07):779-781. DOI： 10.15980/j.tzzz.2015.07.033.

Qu Dianpeng, Liu Jiasheng, Gu Xin, et al. Effect of Element B on Mechanical Properties of High W,Cr Nickel-base Superalloy. [J]. Special Casting & Nonferrous Alloys 35(7):779-781(2015) DOI： 10.15980/j.tzzz.2015.07.033.

摘要

采用真空感应熔炼技术制备不同B含量的高W、Cr镍基高温合金

测定了合金的持久性能和力学性能

研究了B含量对合金的持久性能和拉伸力学性能的影响。采用SEM和XRD对合金进行了微观形貌观察和相组成分析。结果表明

铸态合金中存在大量的α-W相

热处理后合金中α-W相溶入基体

仅在晶界区域存在少量的α-W相。B可提高合金在980℃、83 MPa下的持久寿命。室温条件下

随B含量的增加

合金的抗拉强度降低

塑性提高。900℃条件下

随B含量的增加

合金的抗拉强度稍有提高。室温条件下B对晶界的强化作用要小于高温条件下的强化作用。

Abstract

The nickel-base superalloy with high W

Cr content used for the experiment was prepared with different B additions.And effects of element B on tensile properties and stress rupture life at room and high temperature were analyzed.The influence of heat treatment on the eutectic morphology in the alloy was observed by SEM and XRD analysis.The results reveal that a littileα-W phase can be observed in as-cast alloy

and theα-W phase is dissolved into the matrix after heat treatment

meanwhile

there is only a littleα-W phase nearby the region of grain boundary.Element B in alloy can improve the stress at980 ℃for 83 MPa.At room temperature

with the increase of the content of B

the tensile strength of the alloy was decreased while the plastic is improved.At 900 ℃

with the increase of B

the tensile strength of alloy was increased slightly.The effect of element B on the strengthening effects for grain boundary at room temperature is less than that at high temperature.