Abstract

The structure and composition of the arc sprayed coatings formed using a flux cored Fe–C–Si–Mn–Cr–Ni–Mo wire are studied. A carbon-fluorine-containing additive, namely, the gas purification dust of aluminum production ((wt %) 21–46 Al₂O₃, 18–27 F, 8–15 Na₂O, 0.4–6 K₂O, 0.7–2.3 CaO, 0.5–2.5 SiO₂, 2.1–3.3 Fe₂O₃, 12.5–30.2 C_tot, 0.07–0.9 MnO, 0.06–0.9 MgO, 0.09–0.19 S, 0.10–0.18 P) is introduced into the charge of the flux cored wire instead of amorphous carbon. The problems of the influence of the carbon–fluorine additive on the weldability and the contamination of the deposited metal with oxide nonmetallic inclusions are considered; the microstructure and the contamination of the deposited metal are studied. The microstructure of the deposited layer formed using a flux cored electrode of the Fe–C–Si–Mn–Cr–Ni–Mo system consists of acicular and lath martensite arranged in the former austenite grains, along the boundaries of which ferrite layers precipitate. Silicates (undeformable) and oxides (point) are found to exist in the deposited metal. According to the results of quantitative analysis of the chemical composition of the nonmetallic inclusions obtained using a Teskan Mira 3 scanning electron microscope, the nonmetallic inclusions in the deposited metal are at most 10 μm in size; their globular shape positively influence the wear resistance of the deposited layer. The chemic composition of the nonmetallic inclusions shows that they mainly consist of silicon, aluminum, and manganese oxides; there are also traces of sulfur, calcium, and magnesium. The metallic matrix contains iron (dominant amount), chromium, manganese, and silicon; the molybdenum content is substantially lower.

中文翻译：

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Fe-C-Si-Mn-Cr-Ni-Mo系药芯焊丝形成的电弧喷涂涂层的结构和成分

摘要

研究了使用药芯 Fe-C-Si-Mn-Cr-Ni-Mo 焊丝形成的电弧喷涂涂层的结构和成分。一种含碳氟添加剂，即铝生产的气体净化粉尘((wt%) 21-46 Al ₂ O ₃ , 18-27 F, 8-15 Na ₂ O, 0.4-6 K ₂ O, 0.7 –2.3 CaO, 0.5–2.5 SiO _{2 , 2.1–3.3} Fe ₂ O ₃ , 12.5–30.2 C 总, 0.07–0.9 MnO, 0.06–0.9 MgO, 0.09–0.19 S, 0.10–0.18 P) 被引入药芯焊丝的装料中，而不是无定形碳。考虑了碳氟添加剂对焊接性的影响以及氧化物非金属夹杂物对熔敷金属的污染问题；研究了熔敷金属的微观结构和污染情况。使用 Fe-C-Si-Mn-Cr-Ni-Mo 系的药芯电极形成的沉积层的微观结构由排列在原奥氏体晶粒中的针状和板条状马氏体组成，沿其边界析出铁素体层。发现沉积金属中存在硅酸盐（不可变形）和氧化物（点）。根据Teskan Mira 3扫描电镜对非金属夹杂物化学成分的定量分析结果，熔敷金属中的非金属夹杂物尺寸最大为10 μm；它们的球状形状对沉积层的耐磨性有积极影响。非金属夹杂物的化学成分表明，它们主要由硅、铝和锰的氧化物组成；还有微量的硫、钙和镁。金属基体含有铁（主要量）、铬、锰和硅；钼含量大大降低。非金属夹杂物的化学成分表明，它们主要由硅、铝和锰的氧化物组成；还有微量的硫、钙和镁。金属基体含有铁（主要量）、铬、锰和硅；钼含量大大降低。非金属夹杂物的化学成分表明，它们主要由硅、铝和锰的氧化物组成；还有微量的硫、钙和镁。金属基体含有铁（主要量）、铬、锰和硅；钼含量大大降低。