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Novel Gradient Alloy Steel with Quasi-Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior
Steel Research International ( IF 1.9 ) Pub Date : 2021-06-02 , DOI: 10.1002/srin.202100232 Xu Wang 1 , Chun Hua Zhang 1 , Feng Qiu Zhou 1 , Song Zhang 1 , Jiang Chen 2 , Jing Bo Zhang 2
Steel Research International ( IF 1.9 ) Pub Date : 2021-06-02 , DOI: 10.1002/srin.202100232 Xu Wang 1 , Chun Hua Zhang 1 , Feng Qiu Zhou 1 , Song Zhang 1 , Jiang Chen 2 , Jing Bo Zhang 2
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In this article, a quasi-continuous ratio gradient alloy steel (GAS) with a 24CrNiMo high-strength low-alloy steel matrix for high-speed railway brake discs is fabricated by selective laser melting (SLM). The composition of GAS is X% 24CrNiMo + (1–X)% wear-resistant stainless steel (WSS), in which X is 100, 65, 35, and 0. The relationship between the microstructure and the corrosion resistance is intensively studied by electron backscatter diffraction (EBSD) and potentiodynamic electrochemical equipment. With the increase in the content of WSS, the low angle grain boundaries of the GAS increases, and the microstructure refines and the texture intensity decreases. The passivation film of the external WSS strengthening layer is dense; the corresponding corrosion potential and corrosion current density are −0.109 V and 2.08 × 10−8 A cm−2, respectively. The corrosion current density is about 1% of the substrate 24CrNiMo, and the corrosion resistance of the material is significantly improved.
中文翻译：
选择性激光熔化制备具有准连续比率的新型梯度合金钢：微观结构和腐蚀行为
在本文中，采用选择性激光熔化 (SLM) 方法制备了一种用于高速铁路制动盘的具有 24CrNiMo 高强度低合金钢基体的准连续比梯度合金钢 (GAS)。GAS 的成分为 X% 24CrNiMo + (1– X )% 耐磨不锈钢 (WSS)，其中X分别为100、65、35和0。通过电子背散射衍射（EBSD）和动电位电化学设备深入研究了微观结构与耐腐蚀性之间的关系。随着WSS含量的增加，GAS的小角度晶界增加，组织细化，织构强度降低。外部WSS强化层钝化膜致密；相应的腐蚀电位和腐蚀电流密度分别为-0.109 V 和2.08 × 10 -8 A cm -2。腐蚀电流密度约为基体24CrNiMo的1%，材料的耐腐蚀性能显着提高。
更新日期：2021-06-02
中文翻译：
选择性激光熔化制备具有准连续比率的新型梯度合金钢：微观结构和腐蚀行为
在本文中，采用选择性激光熔化 (SLM) 方法制备了一种用于高速铁路制动盘的具有 24CrNiMo 高强度低合金钢基体的准连续比梯度合金钢 (GAS)。GAS 的成分为 X% 24CrNiMo + (1– X )% 耐磨不锈钢 (WSS)，其中X分别为100、65、35和0。通过电子背散射衍射（EBSD）和动电位电化学设备深入研究了微观结构与耐腐蚀性之间的关系。随着WSS含量的增加，GAS的小角度晶界增加，组织细化，织构强度降低。外部WSS强化层钝化膜致密；相应的腐蚀电位和腐蚀电流密度分别为-0.109 V 和2.08 × 10 -8 A cm -2。腐蚀电流密度约为基体24CrNiMo的1%，材料的耐腐蚀性能显着提高。
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