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SAF2205雙相不銹鋼在高溫扭轉(zhuǎn)變形條件下的組織演化
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西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué),西北工業(yè)大學(xué)

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Microstructure evolution of SAF2205 duplex stainless steel during torsion deformation at elevated temperature
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Northwestern Polytechnical University,Northwestern Polytechnical University,Northwestern Polytechnical University,Northwestern Polytechnical University,Northwestern Polytechnical University

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    本文研究了SAF2205雙相不銹鋼在高溫（600℃，800℃和1000℃）扭轉(zhuǎn)變形條件下的微觀組織演化。微觀組織演化的結(jié)果表明不同程度的再結(jié)晶現(xiàn)象出現(xiàn)，而且變形試樣中的奧氏體的形貌不同。奧氏體的體積分?jǐn)?shù)隨著變形溫度的增加而減少。800℃扭轉(zhuǎn)條件下的試樣的斷口形貌和室溫下試樣的斷口形貌有很大差異，實(shí)驗(yàn)結(jié)果表明當(dāng)扭轉(zhuǎn)在室溫條件下進(jìn)行時(shí)，斷口形貌呈現(xiàn)韌性斷裂特征，等軸狀和拋物線狀的韌窩分布在斷面上。然而，在800℃條件下扭轉(zhuǎn)的試樣的斷口形貌主要呈現(xiàn)出沿晶斷裂的特征。

    Abstract:

    Microstructure evolution of SAF2205 duplex stainless steel during torsion deformation is studied at elevated temperatures (600°C, 800°C and 1000°C). The results of microstructure evolution indicate that different degrees’ recrystallization phenomena appear and the morphology of austenite is different for the deformed samples. The volume fraction of austenite decreases with the increase of deformation temperature. The fracture morphology of the deformed sample at 800°C is quite different from that of deformed sample at room temperature. It is shown that ductile fracture occurs when the torsion is carried out at the room temperature. Also, the equiaxed and parabolic dimples are observed on fracture surface. However, the fracture morphology of the deformed sample at 800°C is mainly covered by the intergranular fracture.

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張炯炯,姚柯楠,陳漢,朱光,李付國(guó). SAF2205雙相不銹鋼在高溫扭轉(zhuǎn)變形條件下的組織演化[J].稀有金屬材料與工程,2018,47(6):1689~1694.[Jiongjiong Zhang, Kenan Yao, Han Chen, Guang Zhu, Fuguo Li. Microstructure evolution of SAF2205 duplex stainless steel during torsion deformation at elevated temperature[J]. Rare Metal Materials and Engineering,2018,47(6):1689~1694.]
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歷史
  • 收稿日期:2016-09-30
  • 最后修改日期:2017-02-21
  • 錄用日期:2017-02-22
  • 在線發(fā)布日期: 2018-09-06
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