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首页> 外文期刊>Journal of Materials Engineering and Performance >Development of a Novel Cr21 Lean Duplex Stainless Steel and Its Hot Deformation Behavior
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Development of a Novel Cr21 Lean Duplex Stainless Steel and Its Hot Deformation Behavior

机译：开发新型CR21瘦双相不锈钢及其热变形行为

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摘要

In this study, a novel Cr21 lean duplex stainless steel has been developed. In order to investigate the difference in hot workability between the novel steel and the conventional LDX2101, the hot deformation tests were carried out in the temperature ranges from 950 to 1150 degrees C and strain rate ranges from 0.01 to 10s(-1) by using a thermo-mechanical simulator. The peak stress increased with an increase in strain rate and a decrease in deformation temperature. However, the peak stress of the novel Cr21 lean DSS was always higher than that of the conventional LDX2101 under the same deformation conditions. The novel steel with lower deformation activation energy can be more easily deformed than the LDX2101. Meanwhile, the processing maps based on the specific plastic work approach indicated that the novel steel possessed a narrower flow instability region than the LDX2101. The lower difference in softening rate between ferrite and austenite can lead to the better deformation coordination in the novel steel compared to the LDX2101. The excellent hot workability of the novel steel can be obtained due to the low strength difference between the dual phases and the inhibition of the thin lamellar structures along the rolling direction on the transverse propagation of small cracks originating from the edge of the hot-rolled plates.
机译：在本研究中，已经开发了一种新型CR21瘦双面不锈钢。为了研究新型钢和常规LDX2101之间的热可加工性的差异，通过使用a，在950至1150℃的温度范围内进行热变形试验，通过0.01至10s（-1）的温度范围。热机械模拟器。随着应变率的增加和变形温度的降低，峰值应力增加。然而，在相同的变形条件下，新型CR21贫DSS的峰值应力总是高于传统LDX2101的峰值应力。具有较低变形活化能量的新型钢可以比LDX2101更容易变形。同时，基于特定塑料工作方法的处理地图表明，新颖的钢具有比LDX2101更窄的流量不稳定区域。与LDX2101相比，铁氧体和奥氏体之间的软化速率的较低差异可以导致新型钢中的更好的变形协调。由于双相之间的低强度差和沿滚动方向延伸的小裂缝沿源自热轧板边缘的小裂缝的横向传播，可以获得新的钢的优异热可加工性。 。

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