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一種新型鎳基粉末高溫合金不同狀態(tài)熱變形行為研究
作者:
作者單位:

1.中南大學 粉末冶金國家重點實驗室;2.深圳市深汕特別合作區(qū)萬澤精密科技有限公司;3.深圳市萬澤中南研究院有限公司

作者簡介:

通訊作者:

中圖分類號:

TG146.1+5

基金項目:

國家科技重大專項(2017-VI-0009-0080),深圳市工業(yè)和信息化局項目(201806071403422960),深圳市發(fā)展和改革委員會項目(SZDRC 20181000)


The Thermal Deformation Behavior of a Novel Ni-Based PM Superalloy under different initial Conditions
Author:
Affiliation:

1.State Key Laboratory of Powder Metallurgy,Central South University;2.Shenzhen-Shantou Special Cooperation Zone Wedge Precision Technology Co Ltd

Fund Project:

National Science and Technology Major Project（2017-Ⅵ-0009-0080），Industry and Information Technology Bureau of Shenzhen Municipality (Project No. 201806071403422960)

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    摘要:

    利用掃描電子顯微鏡、金相顯微鏡、熱壓縮試驗機、電子背散射衍射儀等研究了一種新型鎳基粉末高溫合金(WZ-A3)在1150℃熱等靜壓態(tài)、熱等靜壓+1150℃熱擠壓態(tài)、熱等靜壓+1130℃熱擠壓態(tài)等三種不同狀態(tài)下顯微組織、熱變形行為和組織演變。結果表明：WZ-A3材料1150℃熱等靜壓態(tài)樣品存在部分粉末原始顆粒邊界(Prior Particle Boundary,PPB)和粗大γ′,經(jīng)1130℃和1150℃擠壓后樣品PPB碎化消失,為等軸晶狀態(tài)。三種狀態(tài)樣品在熱壓縮過程中均表現(xiàn)出加工硬化-再結晶軟化現(xiàn)象。峰值應力熱變形激活能分別是861kJ/mol、858 kJ/mol和489kJ/mol。變形溫度對樣品變形組織影響明顯,1150℃-0.001/s條件下,熱等靜壓態(tài)和熱等靜壓+1130℃熱擠壓態(tài)樣品均出現(xiàn)異常晶粒長大。對比三種狀態(tài),熱等靜壓+1130℃熱擠壓態(tài)樣品變形行為最優(yōu)。

    Abstract:

    The microstructure, the thermal deformation behavior and the microstructure evolution during the thermal deformation of a novel Ni-based Powder Metallurgy(PM) superalloy under different initial conditions（1150℃ Hot Isostatic Pressing，1150℃ Hot Isostatic Pressing+1150℃ Hot Extrusion，1150℃ Hot Isostatic Pressing+1130℃ Hot Extrusion）were investigated by means of the Scanning Electron Microscope(SEM), the Optical Microscope(OM), the Thermal Compression Testing Machine, and the Electron Backscatter Diffractive (EBSD). The results show that the PPBs and the coarse γ′still remains in the HIP samples and the PPBs disappeared in the 1130℃ and 1150℃ hot Extrusion samples, which are equiaxed Grains. During the thermal deformation process, the Work Hardening-Recrystallization Softening phenomenon was observed in these three samples under different conditions. The thermal deformation activation energies of peak stress are 861kJ/mol, 858kJ /mol and 489kJ/mol, respectively. The deformation temperature had an obvious effect on the deformation microstructure of the samples. The abnormal grain growth appeared in both the hot isostatic pressing and hot isostatic pressing+1130℃ hot extruded samples under the condition of 1150℃-0.001/s. Compared with the other two conditions, the sample of 1150℃ Hot Isostatic Pressing+1130℃ Hot Extrusion showed the best deformation behavior.

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引用本文

楊金龍,馬向東,李遠,肖磊,郭建政.一種新型鎳基粉末高溫合金不同狀態(tài)熱變形行為研究[J].稀有金屬材料與工程,2022,51(2):651~660.[Yang Jinlong, Ma Xiangdong, Li Yuan, Xiao Lei, Guo Jianzheng. The Thermal Deformation Behavior of a Novel Ni-Based PM Superalloy under different initial Conditions[J]. Rare Metal Materials and Engineering,2022,51(2):651~660.]
DOI：10.12442/j. issn.1002-185X.20210137

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歷史
  • 收稿日期:2021-02-19
  • 最后修改日期:2021-04-28
  • 錄用日期:2021-05-12
  • 在線發(fā)布日期: 2022-03-09
  • 出版日期: 2022-02-28