Effect of Nb,Mo and Ti on the microstructures and mechanical properties of 700MPa weathering steel
Using metallurgical structure observation and measurement of mechanical properties such as micro-hardness, tensile test,cold-bend, the effect of Nb, Mo and Ti on the structure and mechanical properties of 700MPa weathering steel was studied under the same rolling conditions. The results show the formation of M/A is promoted by Mo, while inhibited by Ti. Furthermore, M/A island, as a hard phase, is harm to the material toughness and plasticity; high M/A island fraction will result in obvious crack during cold bending.The effect of Nb on increasing the strength of experiment steel is very important. The Nb content of 700MPa steel must be higher than 0.05％ to ensure the strength. The optimal mechanical properties of the experiment steel will be gained by the proper match ratio of Nb,Mo and Ti. The industry trial production of 700MPa high-strength weathering steel for container was also developed.
Weathering steel Nb Mo Ti Mechanical properties M/A island
Wang Bing Song Yulai Wen Xiaoming Wang Houxin Liu Qingyou
Institute for Structural Materials of CISRI, Beijing 100081, China Research and Development Center of Wuhan Ironand Steel (Group) Corp., Wuhan 430080,China Benxi Iron & Steel Group Limited Company; Benxi 117000,China CITIC-CBMM Microalloying Technology Center, Beijing 100081, China
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
614-619
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）