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300M鋼基體上高速火焰噴涂WC-17Co和WC-10Co4Cr涂層的疲勞和抗鹽霧腐蝕性能
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Characterizations of Fatigue and Salt Spray Corrosion Resistance of HVAF Sprayed WC-17Co and WC-10Co4Cr Coatings on the Substrate of 300M Steel
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    摘要:

    以涂層在飛機(jī)起落架的應(yīng)用作為研究背景，在300M超高強(qiáng)鋼基體上對替代電鍍硬鉻的兩種高速火焰噴涂WC- 17Co和WC-10Co4Cr涂層的疲勞和抗中性鹽霧腐蝕性能進(jìn)行了研究。結(jié)果表明，兩種有涂層的300M鋼的疲勞壽命均高于無涂層300M鋼，如考慮扣除涂層承受載荷，有涂層的300M鋼與無涂層300M鋼的疲勞壽命相當(dāng)。噴砂鑲嵌在基體表面的剛玉砂粒導(dǎo)致有WC-10Co4Cr涂層的疲勞壽命低于有WC-17Co涂層的300M鋼。兩種涂層對基體的疲勞性能都沒有負(fù)面影響；兩種涂層都提高了300M鋼的抗鹽霧腐蝕性能，但有WC-10Co4Cr涂層的300M鋼表現(xiàn)出更好的抗鹽霧腐蝕性能。綜合比較兩種涂層的性能，高速火焰噴涂WC-10Co4Cr涂層是更好的電鍍鉻替代涂層。

    Abstract:

    The fatigue and neutral salt spray corrosion resistance for bare and coated high strength steel were investigated in this paper. The results indicated that WC-17Co and WC-10Co4Cr coatings led to significant increase of fatigue resistance compared with the substrate. There were also comparably similar cycles to failure for the bare and the coated substrates even though the stress which was WC-based coatings shouldered was taken into account. The lower cycles to the failure for WC-10Co4Cr coated substrate than those for WC-17Co coated substrate were attributed to embeding of blasted alumina grit on the substrate surface, which resulted in the great decrease of the cycles to failure. Both WC coatings produced no negative effect on the fatigue performance of 300M steel. The neutral salt spray corrosion resistance for 300M steel substrate was significantly improved after coating process, especially for WC-10Co4Cr coating. As a conclusion, HVAF WC-10Co4Cr coated high strength steel exhibited better performances in both fatigue and neutral salt spray corrosion resistance than that of the substrate, and WC-10Co4Cr coating was a better candidate to chrome plating.

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周克崧,鄧春明,劉 敏,宋進(jìn)兵,鄧暢光.300M鋼基體上高速火焰噴涂WC-17Co和WC-10Co4Cr涂層的疲勞和抗鹽霧腐蝕性能[J].稀有金屬材料與工程,2009,38(4):671~676.[Zhou Kesong, Deng Chunming, Liu Min, Song Jinbing, Deng Changguang. Characterizations of Fatigue and Salt Spray Corrosion Resistance of HVAF Sprayed WC-17Co and WC-10Co4Cr Coatings on the Substrate of 300M Steel[J]. Rare Metal Materials and Engineering,2009,38(4):671~676.]
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  • 收稿日期:2008-08-31
  • 最后修改日期:2009-03-18
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