快冷出口温度对热镀锌600 MPa级双相钢性能及表面质量的影响
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摘要
针对热镀锌工艺中快冷出口温度对热镀锌双相钢的性能和表面质量的影响进行了研究,分别设定不同的快冷出口温度,对不同工艺参数试样进行了力学性能、显微组织和表面质量分析。结果表明,随着快冷出口温度的提高,铁素体中碳、锰等元素扩散到奥氏体内部,提高奥氏体淬透性,从而获得更多的马氏体,得到良好的力学性能;但快冷出口温度超过500℃时,会造成锌锅温度增高,造成表面锌灰、锌渣等缺陷,所以快冷出口温度在480±10℃范围内,可以在保证力学性能良好的同时获得更为优质的表面质量。
Effect of rapid cooling outlet temperature on properties and surface quality of hot dip galvanized dual phase steel was researched.Mechanical properties,microstructure and surface analysis of the samples with different process parameters were analyzed by setting different rapid cooling outlet temperature. The results show that with the increase of the outlet temperature,elements such as carbon and manganese in ferrite diffuse to the grain of austenite to improve the hardenability of austenite and get more martensite,so the good mechanical properties can be obtained; but when the rapid cooling outlet temperature exceeds 500 ℃,it can lead to higher temperature of zinc pot causing surface defects such as zinc vapour ash,zinc dross. So the rapid cooling outlet temperature should be controlled at 480 ± 10 ℃,the preferable surface quality can be obtained as well as the good mechanical properties.
Effect of rapid cooling outlet temperature on properties and surface quality of hot dip galvanized dual phase steel was researched.Mechanical properties,microstructure and surface analysis of the samples with different process parameters were analyzed by setting different rapid cooling outlet temperature. The results show that with the increase of the outlet temperature,elements such as carbon and manganese in ferrite diffuse to the grain of austenite to improve the hardenability of austenite and get more martensite,so the good mechanical properties can be obtained; but when the rapid cooling outlet temperature exceeds 500 ℃,it can lead to higher temperature of zinc pot causing surface defects such as zinc vapour ash,zinc dross. So the rapid cooling outlet temperature should be controlled at 480 ± 10 ℃,the preferable surface quality can be obtained as well as the good mechanical properties.
引文
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[9]Bellhouse E M,Mc Dermid J R.Selective oxidation and reactive wetting of 1.0 Pct Si-0.5 Pct A1 and 1.5 Pct Si TRIP-assisted steels[J].Metal Mater Trans A,2010,41:1539-1553.
[10]Wang Hui,Deng Zhaojun,Lin Chengjiang.Effect of overaging temperature on the properties and microstructures of high aluminum dual phase steel[C]//Proceedings of International Conference on Advanced Steels.2010:63-68.
[2]Jong Sang Kim,Suk-Kyu Lee.Development of hot-dip galvanized advanced high strength steels[A]//中国2010带钢连续热镀锌发展论坛[C]//北京腐蚀与防护协会,北京,2010:36-38.
[3]Bandyopadhyay N R,Datta S.Effect of manganese partitioning on transformation induced plasticity characteristics in microalloyed dual phase steels[J].ISIJ International,2004,44(5):927-934.
[4]任振全,田亚强,李然,等.Q&P工艺预先Mn配分处理低碳硅锰钢的组织与性能[J].金属热处理,2016,41(12):113-116.Ren Zhenquan,Tian Yaqiang,Li Ran,et al.Microstructure and properties of low carbon silicon manganese steel treated by Mn prepartitioning I&Q&P process[J].Heat Treatment of Metals,2016,41(12):113-116.
[5]谷海容,赵征志,赵爱民,等.冷却工艺参数对600 MPa级热轧双相钢组织和性能的影响[J].金属热处理,2016,41(11):79-83.Gu Hairong,Zhao Zhengzhi,Zhao Aimin,et al.Effect of cooling processing parameters on microstructure and properties of 600 MPa grade hot-rolled dual phase steel[J].Heat Treatment of Metals,2016,41(11):79-83.
[6]齐春雨,王贺贺,李远鹏,等.热镀锌工艺对DP590钢板表面镀层性能的影响[J].金属热处理,2015,40(10):151-154.Qi Chunyu,Wang Hehe,Li Yuanpeng,et al.Effect of galvannealing parameters on coating properties of DP590 steel plate[J].Heat Treatment of Metals,2015,40(10):151-154.
[7]袁训华,张启富,江社明.热镀锌合金化工艺对镀层表而摩擦特性的影响[J].材料热处理学报,2011,32(6):132-137.Yuan Xunhua,Zhang Qifu,Jiang Sheming.Effect of galvannealing parameters on friction characteristics of galvannealed coatings[J].Transactions of Materials and Heat Treatment,2011,32(6):132-137.
[8]潘勋平.热镀锌带钢镀层锌渣缺陷形成分析及改进技术[J].宝钢技术,2004(3):24-27.Pan Xunping.Analysis and improvement of dross pick-up in hot dip strip coating[J].Baosteel Technology,2004(3):24-27.
[9]Bellhouse E M,Mc Dermid J R.Selective oxidation and reactive wetting of 1.0 Pct Si-0.5 Pct A1 and 1.5 Pct Si TRIP-assisted steels[J].Metal Mater Trans A,2010,41:1539-1553.
[10]Wang Hui,Deng Zhaojun,Lin Chengjiang.Effect of overaging temperature on the properties and microstructures of high aluminum dual phase steel[C]//Proceedings of International Conference on Advanced Steels.2010:63-68.