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通過再結(jié)晶退火實(shí)現(xiàn)剪切-壓縮變形態(tài) GH4169 高溫合金的顯微組織均勻化
作者:
作者單位:

1.江蘇大學(xué) 材料科學(xué)與工程學(xué)院，江蘇 鎮(zhèn)江 212013;2.江蘇銀環(huán)精密鋼管有限公司 技術(shù)管理部，江蘇 宜興 214200;3.重慶大學(xué) 先進(jìn)裝備機(jī)械傳動(dòng)國家重點(diǎn)實(shí)驗(yàn)室，重慶 400044;4.江蘇大學(xué) 機(jī)械工程學(xué)院，江蘇 鎮(zhèn)江 212013

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基金項(xiàng)目:

國家自然科學(xué)基金（SKLMT-MSKFKT-202219）；江蘇省自然科學(xué)基金（BK20220548）；新金屬材料國家重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目（2022-Z21）；高端裝備機(jī)械傳動(dòng)全國重點(diǎn)實(shí)驗(yàn)室開放基金資助（SKLMT-MSKFKT-202219）


Microstructure Homogenization of GH4169 Superalloy in Shear-Compression Deformation State by Recrystallization Annealing
Author:
Affiliation:

1.School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;2.Technical Management Department, Jiangsu Yinhuan Precision Steel Tube Co., Ltd, Yixing 214200, China;3.State Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing 400044, China;4.School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China

Fund Project:

State Key Laboratory of Mechanical Transmission for Advanced Equipment Project (SKLMT-MSKFKT-202219); Natural Science Foundation of Jiangsu Province (BK20220548); Open Research Fund from the State Key Lab of Advanced Metals and Materials, University of Science and Technology Beijing (2022-Z21); National Natural Science Foundation of China (52005223)

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    摘要:

    GH4169 高溫合金在剪切-壓縮變形后容易出現(xiàn)區(qū)域性微結(jié)構(gòu)特征，這不利于后續(xù)的冷軋加工。在1000~1080 ℃溫度范圍內(nèi)，保溫1~3 h條件下進(jìn)行再結(jié)晶退火處理以研究GH4169高溫合金的微觀組織演變行為，并通過調(diào)節(jié)晶粒大小優(yōu)化其冷成形性能。結(jié)果表明，靜態(tài)再結(jié)晶（SRX）在1000 ℃時(shí)完全形核，原有的粗大晶粒完全被細(xì)小的再結(jié)晶晶粒取代。大角度晶界（HAGB）的弓出位置是SRX的首選形核點(diǎn)。經(jīng)1020~1060 ℃退火后，部分相鄰的SRX晶粒之間發(fā)生吞并，導(dǎo)致一部分晶粒的尺寸增大，而初始動(dòng)態(tài)再結(jié)晶（DRX）晶粒在應(yīng)變集中區(qū)域仍保持微小的尺寸。再結(jié)晶晶粒（包括SRX和DRX）經(jīng)1080 ℃退火后均勻長大，平均晶粒尺寸為87.89 μm，此時(shí)顯微組織的區(qū)域特征完全消失，組織均勻化程度明顯提高。由于SRX的生長事故，經(jīng)1080 ℃退火后出現(xiàn)了階梯狀孿晶，且孿晶界 （Σ3）的長度分?jǐn)?shù)達(dá)到35.8%，這有利于提高GH4169高溫合金的高溫持久性能。剪切-壓縮變形態(tài)GH4169高溫合金的最佳再結(jié)晶退火工藝最終被確定為1080 ℃保溫1 h，水冷。

    Abstract:

    Regional microstructure characteristic always appears in shear-compression deformed GH4169 superalloy, which is detrimental to subsequent cold-rolling process in engineering. Recrystallization annealing treatments within temperature range of 1000?1080 °C and holding time range of 1?3 h were carried out to investigate the microstructure evolution behavior, and the cold-forming property of GH4169 superalloy was optimized by regulating the grain size. Results show that static recrystallization (SRX) grains are fully nucleated at 1000 °C and the original coarse grains are completely replaced by fine recrystallized grains. Bulges of high angle grain boundaries are the preferred nucleation points of SRX. At 1020?1060 °C, grain annexation takes place among adjacent SRX grains, causing partial grains to increase, while the original dynamic recrystallization (DRX) grains keeps tiny in the strain con-centration region. Recrystallized grains (both SRX and DRX) uniformly grow up, with an average grain size of 87.89 μm at 1080 °C, at which the regional characteristic completely disappears, and the microstructure is significantly homogenized. Step twins appear at 1080 °C due to the SRX growth accidents, and the length fraction of twin boundaries (Σ3) reaches 35.8%, which can effectively improve the high temperature resistance of GH4169 superalloy. Ultimately, the optimal recrystallization annealing of shear-compression deformed GH4169 superalloy is determined as 1080 °C-1 h, followed by water cooling.

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引用本文

陳樂利,高佩,羅銳,程曉農(nóng),孟憲凱.通過再結(jié)晶退火實(shí)現(xiàn)剪切-壓縮變形態(tài) GH4169 高溫合金的顯微組織均勻化[J].稀有金屬材料與工程,2024,53(7):1882~1886.[Chen Leli, Gao Pei, Luo Rui, Cheng Xiaonong, Meng Xiankai. Microstructure Homogenization of GH4169 Superalloy in Shear-Compression Deformation State by Recrystallization Annealing[J]. Rare Metal Materials and Engineering,2024,53(7):1882~1886.]
DOI：10.12442/j. issn.1002-185X. E20230040

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  • 收稿日期:2023-09-28
  • 最后修改日期:2024-01-18
  • 錄用日期:2024-01-31
  • 在線發(fā)布日期: 2024-07-16
  • 出版日期: 2024-07-12