High performance e-motors require a continuous enhancement of physical and mechanical properties for non-oriented electrical steel(NOES).However,the optimization of mechanical and magnetic properties simultaneously du...High performance e-motors require a continuous enhancement of physical and mechanical properties for non-oriented electrical steel(NOES).However,the optimization of mechanical and magnetic properties simultaneously during NOES processing is extremely challenging where both properties directly influenced by alloy grain size,crystallographic texture,and dislocation density.In the current investigation,recrystallization annealing cycles were employed to modify the microstructure with the aim of balance magnetic and mechanical properties of NOES concurrently.The results showed that with increasing annealing temperatures,the degree of recrystallization and grain size increased,while the dislocation density reduced considerably at the early stage of recrystallization.Meanwhile,the values of texture parameter A*_(overall)(which is a function of overall individual grain orientations and their alignments with easy magnetization directions)were increased.It was evident that the magnetic properties were significantly improved,however the alloy strength was reduced with increasing annealing temperatures.Here,the correlation between magnetic properties as well as alloy strength on grain size,texture,and dislocation density were determined.From crystallographic texture intensity and measured properties quantitative analyses it was concluded that grain size was the predominant factor in balancing the mechanical and magnetic properties of the studied steel.Furthermore,the optimal comprehensive properties(both magnetic and mechanical)were achieved by annealing at 800℃,which yielded a magnetic induction B5000 of 1.616 T,a high-frequency iron loss P_(1.0/400)of 22.43 W/kg,and a yield strength of 527 MPa.展开更多
使用自主研制的MCJNi1K低碳中锰高硅焊丝对Q460E低合金高强钢进行埋弧焊接试验,对不同热输入条件下焊缝金属的组织和性能进行了研究。结果表明,在一定的范围内随热输入增大,焊缝金属低温冲击韧性先增大再降低。当热输入为21.92 k J/cm时...使用自主研制的MCJNi1K低碳中锰高硅焊丝对Q460E低合金高强钢进行埋弧焊接试验,对不同热输入条件下焊缝金属的组织和性能进行了研究。结果表明,在一定的范围内随热输入增大,焊缝金属低温冲击韧性先增大再降低。当热输入为21.92 k J/cm时,低温冲击韧性最高,焊缝区随组织主要为针状铁素体,断口有韧窝特征。热输入较小或较大时,焊缝区分别有先共析铁素体和魏氏组织产生,均会降低低温冲击韧性。展开更多
基金supported by the National Natural Science Foundation of China(Nos.52074200,52274393)the Science and Technology Project of Hubei Province(2023BAB141)+1 种基金the Natural Science Foundation of Hubei Province(2022CFB091)the State Key Laboratory for Advanced Metals and Materials(2023-ZD03).
文摘High performance e-motors require a continuous enhancement of physical and mechanical properties for non-oriented electrical steel(NOES).However,the optimization of mechanical and magnetic properties simultaneously during NOES processing is extremely challenging where both properties directly influenced by alloy grain size,crystallographic texture,and dislocation density.In the current investigation,recrystallization annealing cycles were employed to modify the microstructure with the aim of balance magnetic and mechanical properties of NOES concurrently.The results showed that with increasing annealing temperatures,the degree of recrystallization and grain size increased,while the dislocation density reduced considerably at the early stage of recrystallization.Meanwhile,the values of texture parameter A*_(overall)(which is a function of overall individual grain orientations and their alignments with easy magnetization directions)were increased.It was evident that the magnetic properties were significantly improved,however the alloy strength was reduced with increasing annealing temperatures.Here,the correlation between magnetic properties as well as alloy strength on grain size,texture,and dislocation density were determined.From crystallographic texture intensity and measured properties quantitative analyses it was concluded that grain size was the predominant factor in balancing the mechanical and magnetic properties of the studied steel.Furthermore,the optimal comprehensive properties(both magnetic and mechanical)were achieved by annealing at 800℃,which yielded a magnetic induction B5000 of 1.616 T,a high-frequency iron loss P_(1.0/400)of 22.43 W/kg,and a yield strength of 527 MPa.
文摘使用自主研制的MCJNi1K低碳中锰高硅焊丝对Q460E低合金高强钢进行埋弧焊接试验,对不同热输入条件下焊缝金属的组织和性能进行了研究。结果表明,在一定的范围内随热输入增大,焊缝金属低温冲击韧性先增大再降低。当热输入为21.92 k J/cm时,低温冲击韧性最高,焊缝区随组织主要为针状铁素体,断口有韧窝特征。热输入较小或较大时,焊缝区分别有先共析铁素体和魏氏组织产生,均会降低低温冲击韧性。
