Effect of ambient temperature on the wear performance of typical gun barrel steels
-
摘要: 通過摩擦磨損、高溫硬度及相應的分析試驗研究了典型身管用鋼32Cr2MoVA、30SiMn2MoVA在室溫、200、400以及600℃下的摩擦磨損行為與規律.結果表明:兩種材料的摩擦系數在各個溫度區間內的區別不大,主要受摩擦氧化物產生與否影響.32Cr2MoVA的磨損率隨著溫度的提高先降低再提高之后又下降,30SiMn2MoVA的磨損率隨著溫度的上升而先降低,然后逐漸升高,600℃達到最高.溫度、身管鋼在高溫下的硬度和磨盤材料與滑動銷的高溫硬度差(Hd-Hp)共同影響磨損表面氧化物層的最終形態.室溫至200℃時,身管鋼磨損行為主要受表面氧化物層的影響.室溫下兩種身管鋼磨損機理均為黏著磨損及磨粒磨損,200℃時均為氧化輕微磨損.環境溫度達到400℃以上時,身管鋼以及磨盤材料的基體硬度開始影響磨損行為.400℃時兩種身管鋼磨損機理均為氧化嚴重磨損.600℃時,32Cr2MoVA的Hd-Hp減小,磨損表面出現了厚度很大、致密的氧化物層,磨損機理為氧化輕微磨損;而30SiMn2MoVA的Hd-Hp顯著增大,試樣發生了明顯的塑性擠出,為塑性擠出磨損.Abstract: The wear and wear mechanisms of two typical gun barrel steels at room temperature, 200, 400, and 600℃ were investigated by wear, high-temperature hardness, and other types of tests. It was found that the friction coefficients of the two typical gun barrel steels varied little with temperature owing to the formation of triboxides. The wear rate of 32Cr2MoVA first decreased, then increased, and finally decreased with increasing temperature, whereas the wear rate of 30SiMn2MoVA first decreased and then increased with increasing temperature, reaching its maximum at 600℃. The triboxides on the wear surface depended on the temperature, the hardness of the gun barrel steel, and the difference between disc and pin hardness (Hd-Hp) at high temperatures. The temperaturedependent wear of both gun barrel steels depends on the triboxides up to 200℃. Adhesive wear prevailed with simultaneous abrasive wear at room temperature, whereas mild oxidative wear was dominant at 200℃ in both steels. The wear depends on the hardness of the gun barrel steels and disc at 400℃. Severe oxidative wear was dominant at 400℃ in both steels. At 600℃, thick and compact triboxides formed at the wear surface of 32Cr2MoVA owing to the decreasing Hd-Hp; consequently, mild oxidative wear became the dominant mechanism. For 30SiMn2MoVA, the extrusion of pin material, which is attributed to the abrupt increase in Hd-Hp, suggests that extrusion wear prevailed.
-
Key words:
- gun barrel steel /
- wear /
- temperature /
- triboxides /
- matrix
-
參考文獻
[5] Cote P J, Rickard C. Gas-metal reaction products in the erosion of chromium-plated gun bores. Wear, 2000, 241(1):17 [7] Wei M X, Wang S Q, Chen K M, et al. Relations between oxidative wear and Cr content of steels. Wear, 2011, 272(1):110 [8] Wei M X, Wang F, Wang S Q, et al. Comparative research on the elevated-temperature wear resistance of a cast hot-working die steel. Mater Des, 2009, 30(9):3608 [9] Li S, Wu X C, Li X X, et al. Wear characteristics of Mo-W-type hot-work steel at high temperature. Tribology Lett, 2016, 64(2):32 [10] Wang S Q, Wang F, Cui X H, et al. Effect of secondary carbides on oxidation wear of the Cr-Mo-V cast steels. Mater Lett, 2008, 62(2):279 [14] Medvedeva A, Bergstrom J, Gunnarsson S, et al. High-temperature properties and microstructural stability of hot-work tool steels. Mater Sci Eng A, 2009, 523(1-2):39 [17] Akagak T, Rigney D A. Sliding friction and wear of metals in vacuum. Wear, 1991, 149(1-2):353 [18] Zhang Q Y, Wang S Q, Li X X, et al. Relations of counterface hardness with wear behavior and tribo-oxide layer of AISI H13 steel. Metall Mater Trans A, 2016, 47(12):5960 [19] Wei M X, Chen K M, Wang S Q, et al. Analysis for wear behaviors of oxidative wear. Tribology Lett, 2011, 42(1):1 [20] Wang S Q, Wei M X, Wang F, et al. Transition of elevatedtemperature wear mechanisms and the oxidative delamination wear in hot-working die steels. Tribology Int, 2010, 43(3):577 [21] Wang S Q, Wei M X, Zhao Y T. Effects of the tribo-oxide and matrix on dry sliding wear characteristics and mechanisms of a cast steel. Wear, 2010, 269(5-6):424 [22] So H, Chen H M, Chen L W. Extrusion wear and transition of wear mechanisms of steel. Wear, 2008, 265(7-8):1142 -
點擊查看大圖
計量
- 文章訪問數: 975
- HTML全文瀏覽量: 374
- PDF下載量: 34
- 被引次數: 0
下載:
