表面铝含量对渗铝Q235钢组织和性能的影响  被引量:5

Influence of Surface Aluminum Content on Microstructure and Property of Q235 Steel Undergoing Aluminizing

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作  者:丁志敏[1] 姜来金[1] 阎颖[1] 

机构地区:[1]大连交通大学材料科学与工程学院,辽宁大连116028

出  处:《金属热处理》2007年第3期59-61,共3页Heat Treatment of Metals

基  金:辽宁省教育厅高校科研基金(2004D005);大连市科技计划项目(2005A10GX105)

摘  要:用粉末渗铝法在Q235钢表面上获得了不同铝含量的渗铝层,并对其表面组织和性能进行了分析。结果表明,当表面铝含量为2.6%时,试样表面未形成连续的渗铝层;当铝含量≥4.4%时,表面均形成了连续的渗铝层。当表面铝含量≤4.4%时,试样表面仅由含铝的α相固溶体组成;而含铝量达到36.2%时,表面由α相固溶体与AlFe相组成。随着表面铝含量的增加,试样的硬度和抗高温氧化性能增加。当表面铝含量为2.6%时,其抗高温氧化性能仍比不含铝的高;而当铝含量为51.2%时,其抗高温氧化性能与1Cr18Ni9Ti不锈钢相同。A powder aluminizing technique was used to fabricate the aluminizing layers on the surface of Q235 steel . The microstructures and properties of the aluminizing Q235 steel were studied. The results show that the continuous aluminizing layer can not be formed on the aluminizing surface with 2.6% aluminum content, but continuous aluminizing layer exists when aluminum content is 4. 4% or more. The aluminizing surface with aluminum content of 4. 4% or less is only consisted of a phase,and the surface with 36. 2% is composed of a and AlFe phase. Hardness and high temperature oxidation resistance increase with increase in aluminum content on the aluminizing surface . The high temperature oxidation resistance of the specimen with 2.6% aluminum content on aluminizing surface is superior to that of pure Q235 steel, while the one with 51.2% aluminum is the same as that of 1Cr18Ni9Ti stainless steel.

关 键 词:Q235钢 渗铝 显微组织 抗高温氧化性能 

分 类 号:TG156.8[金属学及工艺—热处理]

 

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