-1，并通過應(yīng)力-應(yīng)變曲線構(gòu)建其熱加工圖。結(jié)果表明，隨著銅含量的增加（0%Cu-304L，2.42%Cu-304L，3.60%Cu-304L），較好的熱加工溫度范圍從200 ℃降低到75 ℃。微觀組織分析發(fā)現(xiàn)：該材料失穩(wěn)的主要原因有局部流動失穩(wěn)、剪切帶、空洞和裂紋；在熱變形過程中，塑性變形能在短時(shí)間內(nèi)轉(zhuǎn)化為熱量，導(dǎo)致變形材料局部溫度升高，這使得熔點(diǎn)相對較低的銅偏析區(qū)易融化從而形成孔洞，成為裂紋的來源，降低了材料的熱加工性。"/>

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銅元素對304L不銹鋼熱加工性能的影響
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作者單位:

1.太原科技大學(xué) 材料科學(xué)與工程學(xué)院，山西 太原 030024;2.太原科技大學(xué) 機(jī)械工程學(xué)院，山西 太原 030024;3.東北大學(xué) 軋制技術(shù)及連軋自動化國家重點(diǎn)實(shí)驗(yàn)室，遼寧 沈陽 110819

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基金項(xiàng)目:

Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2020L0333), the Natural Science Foundation of Liaoning Province (No.2019-KF-25-05), Shanxi Province's Key core Technology and Common Technology Research and Development Project (20201102017), the National Key Research and Development Program of China (2016YFB0300205), National Natural Science Foundation of China(52005358).


Effects of Element Cu on Hot Workability of 304L Stainless Steel
Author:
Affiliation:

1.School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;2.School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;3.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China

Fund Project:

Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2020L0333); Natural Science Foundation of Liaoning Province (2019-KF-25-05); Shanxi Province's Key Core Technology and Common Technology Research and Development Project (20201102017); National Key Research and Development Program of China (2016YFB0300205); National Natural Science Foundation of China (52005358)

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    摘要:

    采用Gleeble-3800熱模擬試驗(yàn)機(jī)對含銅304L不銹鋼進(jìn)行熱壓縮實(shí)驗(yàn)，變形溫度為900~1150 ℃，應(yīng)變速率為0.01~20 s-1，并通過應(yīng)力-應(yīng)變曲線構(gòu)建其熱加工圖。結(jié)果表明，隨著銅含量的增加（0%Cu-304L，2.42%Cu-304L，3.60%Cu-304L），較好的熱加工溫度范圍從200 ℃降低到75 ℃。微觀組織分析發(fā)現(xiàn)：該材料失穩(wěn)的主要原因有局部流動失穩(wěn)、剪切帶、空洞和裂紋；在熱變形過程中，塑性變形能在短時(shí)間內(nèi)轉(zhuǎn)化為熱量，導(dǎo)致變形材料局部溫度升高，這使得熔點(diǎn)相對較低的銅偏析區(qū)易融化從而形成孔洞，成為裂紋的來源，降低了材料的熱加工性。

    Abstract:

    The hot deformation behavior of Cu-bearing 304L stainless steel was studied by performing hot compression on Gleeble-3800 thermo mechanical simulator in the temperatures of 900~1150 ℃ and strain rates of 0.01~20 s-1, and the processing maps were established by stress-strain curves. Results show that the better processing temperature range is narrowed from 200 °C to 75 °C with the increase of copper content in the alloy (0wt%Cu-304L, 2.42wt%Cu-304L, 3.60wt%Cu-304L). The alloy microstructure characteri-zation reveals that the main causes of instability are local flow instability, shear zone, void and cracking. At the same time, it is found that the plastic deformation can be converted into heat in a short time, leading to the local temperature rise of the deformed materials, which makes the copper segregation area with relatively low melting point easy to form holes and to become the source of cracking, and then reduces the hot workability.

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李華英,馬立峰,宋耀輝,李娟,姬亞鋒,劉海濤.銅元素對304L不銹鋼熱加工性能的影響[J].稀有金屬材料與工程,2022,51(2):400~407.[Li Huaying, Ma Lifeng, Song Yaohui, Li Juan, Ji Yafeng, Liu Haitao. Effects of Element Cu on Hot Workability of 304L Stainless Steel[J]. Rare Metal Materials and Engineering,2022,51(2):400~407.]
DOI：10.12442/j. issn.1002-185X.20210604

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  • 收稿日期:2021-07-11
  • 最后修改日期:2022-01-07
  • 錄用日期:2021-09-09
  • 在線發(fā)布日期: 2022-03-03
  • 出版日期: 2022-02-28