左瑶,王善林,龚玉兵.Fe基非晶涂层组织及晶化行为分析[J].精密成形工程,2018,10(5):113-118.
ZUO Yao,WANG Shan-lin,GONG Yu-bing.Microstructure and Crystallization Behavior of Fe-based Amorphous Coating[J].Journal of Netshape Forming Engineering,2018,10(5):113-118. |
| Fe基非晶涂层组织及晶化行为分析 |
| Microstructure and Crystallization Behavior of Fe-based Amorphous Coating |
| 投稿时间：2018-07-10 修订日期：2018-09-10 |
| DOI：10.3969/j.issn.1674-6457.2018.05.019 |
| 中文关键词: 超音速火焰喷涂(HVOF) 喷涂速度 显微组织 晶化行为 |
| 英文关键词: HVOF spraying speed microstructure crystallization behavior |
| 基金项目:国家自然科学基金（514610301）；轻合金加工科学与技术国防重点学科实验室基金（gf201501005） |
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| 中文摘要: |
| 目的 研究非晶涂层在不同喷涂速度下的涂层组织及晶化行为。方法 以成分为FeCoCrMoCBY的非晶粉末为喷涂材料，采用超音速火焰喷涂 (HVOF)在Q235钢表面制备非晶涂层，通过降低喷涂速度，使得单位面积上涂层得到的热输入量增加，使得涂层发生晶化行为，利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、差示扫描热仪DSC和透射电镜TEM等研究不同喷涂速度对非晶涂层显微组织及晶化行为的影响。结果 随喷涂速度降低，未熔颗粒减少，涂层孔隙率逐渐减小，涂层晶化程度增高且更易氧化。采用不同喷涂速度使单位面积内涂层的热输入量不一样，导致涂层发生晶化，涂层在晶化过程中先析出α-Fe，再析出FeO, Fe3C及其他相。结论 不同喷涂速度下得到的涂层可以用来分析涂层的晶化行为。对于非晶含量较高的涂层，在界面处也可能会有纳米晶产生。 |
| 英文摘要: |
| The paper aims to study microstructure and crystallization behaviors of amorphous coatings at different spraying speeds. The amorphous powder with FeCoCrMoCBY was used as the spraying material. The amorphous coating was prepared on the surface of Q235 steel by supersonic flame spraying (HVOF). The heat input of the coating per unit area was increased by reducing the spraying speed. Crystallization behaviors of the coating were investigated. Scanning electron microscopy (SEM), X-ray diffractometry (XRD), differential scanning calorimeter (DSC) and transmission electron microscopy (TEM) were used to study microstructure and crystallization of amorphous coatings at different spraying speeds. With the decrease of the spraying speed, the unmelted particles decreased, the coating porosity gradually decreased, the crystallization degree of the coating increased, and the oxidation got easier. At different spraying speeds, the heat input amount of the coating per unit area was different, resulting in crystallization of coating. During crystallization, the coating first precipitated α-Fe, and FeO, Fe3C and other phases precipitate. The resulting coating at different spray rates can be used to analyze crystallization behavior of coating. For coatings with a high amorphous content, nanocrystals may also be produced at the interface. |
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