高釩耐磨合金在不同冷卻方式下的高溫氧化行為

陳平虎; 李瑞卿; 曾松盛; 李曉謙

doi:10.13374/j.issn2095-9389.2018.01.011

高釩耐磨合金在不同冷卻方式下的高溫氧化行為

doi: 10.13374/j.issn2095-9389.2018.01.011

陳平虎^1,2,
李瑞卿^2,3,
曾松盛^4, ,,
李曉謙^1,2,3

1) 中南大學機電工程學院, 長沙 410083
2) 中南大學高性能復雜制造國家重點實驗室, 長沙 410083
3) 中南大學輕合金研究院, 長沙 410083
4) 湖南華菱安賽樂米塔爾汽車板有限公司, 婁底 417000

基金項目:

國家自然科學基金面上項目（51475480， U1637601）；中南大學高性能復雜制造國家重點實驗室項目（ZZYJKT2016-03，ZZYJKT2017-01）；中南大學研究生自主探索創新項目（2015zzts041）

詳細信息

中圖分類號: TG142.72
計量
- 文章訪問數: 712
- HTML全文瀏覽量: 216
- PDF下載量: 21
- 被引次數: 0
出版歷程
- 收稿日期: 2017-06-07

High temperature oxidation behavior of high-vanadium wear resistant alloy in different cooling approaches

1) College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
2) State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
3) Light Alloy Research Institute, Central South University, Changsha 410083, China
4) Valin ArcelorMittal Automotive Steel Co., Ltd., Loudi 417000, China

摘要

摘要: 研究了950℃高溫下高釩耐磨合金的高溫氧化行為，并研究了在隨爐冷卻和空冷兩種不同冷卻方式下的氧化增重與開裂行為.結果表明：氧化初期材料表面發生“暫態氧化” ，所有元素均參與氧化反應，隨后在爐冷時氧化增重比空冷時的氧化增重要大的多，當氧化8 h后單位面積氧化增重分別為82.7 mg·cm^-2與39.1 mg·cm^-2，爐冷與空冷氧化增質量相差一倍多.雖然在基體/氧化層界面形成了能起到一定保護作用的50~200 nm厚Cr₂O₃致密氧化層，但同時也存在疏松氧化層；而爐冷時樣品以生長應力為主，氧化層發生“翹曲”現象，但較少引起氧化層脫落.然而空冷時冷卻速度較大，氧化層內易產生較大熱應力，致使氧化層較易開裂或者脫落.
- 高釩耐磨合金 /
- 高溫氧化 /
- 氧化增質量 /
- 生長應力 /
- 熱應力
Abstract: The oxidation mass increasing method was adopted to explore the oxidation behavior of high-vanadium wear-resistant alloy at 950℃. The oxidation mechanism and cracks behavior were studied with different cooling types (furnace cooling and air cooling). The results indicated that the weight increment per unit area was obviously large at the beginning of the oxidation due to the matrix being in direct contact with the air. Additionally, the oxidation increase gains of furnace and air cooling were 82.7 mg·cm^-2 and 39.1 mg·cm^-2, respectively, after 8 h of oxidation. At the same time, the preferential formation of Cr₂O₃ was observed with 50-200 nm at the matrix and oxidation layer interface. Remarkable thermal stress was produced in the oxidation layer due to the larger cooling rate. The warped phenomenon appeared at the oxidation layer due to the production of growth stress. However, the shedding phenomenon rarely occurred in the oxide layer.
- high-vanadium wear-resistant alloy /
- high temperature oxidation /
- gain in weight /
- growth stress /
- thermal stress

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參考文獻(19)

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