摘要
钢筋锈蚀而带来的建筑物与基础设备的损坏及维护费用十分巨大,但是目前还未生产出理想的专用耐蚀钢筋,在现有钢筋生产工艺条件下,通过添加耐蚀合金元素无法得到理想的强塑性。基于此,在实验室条件下,设计了一种能满足现有工艺条件的400MPa级耐蚀钢筋,并采用Gleeble3500对试验钢的连续冷却转变规律进行研究,同时利用轧机探讨了生产工艺对试验钢力学性能的影响。结果显示,在0.5-1 ℃/s冷却条件下,能获得强塑性较好的铁素体+珠光体+贝氏体复合组织;也即轧后采用空冷或弱水冷可以获得理想的力学性能。
The damage and maintenance cost of buildings and infrastructures caused by rebar corrosion is very substantial.However,there is no ideal special corrosion resistant rebar.It is difficult to obtain high strength and elongation balance through adding high corrosion resistant alloy content under existing production process.Based on this,400 MPa corrosion resistant steel rebar for experiment that can meet existing process conditions is designed.The continuous cooling transformation of tested steel was studied with Gleeble3500,and the influence of production process on mechanical properties of tested steel was explored using rolling mill.The results show that an ideal composite microstructure of ferrite,pearlite and bainite with good strength and elongation balance can be obtained at cooling rate of 0.5-1℃/s.The excellent comprehensive mechanical properties can be obtained by using production process of air cooling or sparse water cooling after rolling.
作者
杨凯
Yang Kai(Nanjing Iron and Steel Co.,Ltd.,Nanjing 210035,China)
出处
《金属制品》
CAS
2022年第5期19-23,共5页
Metal Products
关键词
耐蚀钢筋
连续冷却转变
生产工艺
金相组织
力学性能
corrosion resistant steel rebar
continuous cooling transformation
production process
microstructure
mechanical property
