The impact and effectiveness of the policies for new energy vehicles on industrial development were analyzed and summarized, and the 
future market capacity trend was predicted. Meanwhile the future market capacity of electrical steels used in electric vehicles was initially analyzed. These analysis results can provide a reference for companies concerned about the new energy vehicle industry and segment market. 

On-line determined core loss data are massively produced during production of electrical steels and these data provide timely much more and much valuable information for the evaluation and adjustment of product properties. However, the application of such data for property evaluation and control is still far from satisfactory in steel plants, namely neither are they used for the evaluation of whole coil of a steel strip and determination of the effects of parameter changes on the magnetic properties, nor for the further selfdiagnosis of different kinds of problems reflected in the online core loss curves. This work collects some online core loss curves and analyzes their features and possible existing problems or phenomena based on the difficulties encountered during searching the relationship between processing parameters and magnetic properties. Suggestions for evaluating the properties of whole coils of electrical steel strips quantitatively are given and a preliminary version of software is compiled hoping that this may get the attention from industry to best making use of online core loss data for evaluating properties of whole coils of strips.

The transverse crack in non-oriented electrical steel was tested in this paper, and the continuous casting technology in production process, including the pressure of fan-shaped section, secondary cooling strength, booster pump, liquid core reduction, was investigated and analyzed. The results showed that the causes of the surface transverse crack in nonoriented electrical steel was the segregation of phosphorus element in steel, which caused the grain boundary brittleness and reduced the high temperature plasticity of steel, and the thermal or mechanical stress of the slab with liquid core in No. 1 fanshaped section exceeding the steel’s threshold stress at elevated temperature. The surface transverse crack has been effectively controlled since increasing the equipment precision of No. 1 fanshaped section, and  slowing down the secondary cooling  of No. 1 fanshaped section.

A silicon steel 100AW800DC, which is one of the iron core material of high performance electromagnetic switch, has been successfully developed by combining industrial production with laboratory annealing experiment. Its performance has reached the advanced level of electromagnetic switch iron core material. And the electromagnetic properties will be the best when the transverse thickness deviation is about 26 μm and the range of average grain size from 60 μm to 80 μm. Through simulated annealing experiment of production line, the properties of 100AW800DC with the lowest core loss P1.5/50 of  5.826 3 W/kg, magnetic induction intensity B2500 of 1.631 8 T, hardness HV5 of 159 and yield strength Rp0.2 of 324 MPa can be obtained in the condition of heating time 4 min44 s at 870 ℃.

The precipitations of non-oriented silicon steel produced by CSP were investigated by use of Tecnai F20 TEM with X-ray energy spectrum analyzer. The results showed that, the precipitates of aluminum free steel（the mass fraction of Al less than  0.01 %）50W1300 and 50W800 are mainly Cu_XS/MnS, while the precipitates of the silicon steel 50W1300 and 50W800 containing aluminum,are not only Cu_XS/MnS, but also much Ti (CN) and AlN precipitates. The average size of the precipitates in 50W1300 and 50W800 without aluminum is 51 nm and 90 nm respectively, which is obviously smaller than the average size of 50W1300 and 50W800 contained aluminum of  69 nm and 182 nm.

Wire electrical discharge machining (WEDM) experiments were performed on nonoriented electrical steel to study the effect of different current density levels on the morphology of the cutting surface. The original morphologies of the surface after cutting were observed with the 3D measuring laser microscope. A scanning electron microscope (SEM) was used to observe the cutting surface with the same level of ultrasonic vibration for measuring the adhesion ability of the adhesion layer. The cutting surface became rougher as the current density level increased. The uniform and smooth smallamplitude raised or recessed regions were gradually replaced by oxidizable and irregular steps, whose height transition zones were nearly vertical. And the bright nearspherical resolidified bodies appear surrounded by oxidized regions at an excessively high current density. Therefore, the high level of current density is harmful for controlling the quality of the cutting surface. On the contrary, WEDM technology with lower level of current density has high advantages.

The surface quality indexes of grain oriented silicon steel plates/sheets from three different enterprises were tested. The microstructure and chemical composition of the surface layers were examined by scanning electron microscope and energy dispersive spectrometer. Comparing the surface quality indexes and microstructures of the samples from different enterprises, it is observed that both the surface layer qualities and the surface insulation resistances of the three products are different. The surface insulation resistance of A product is higher than B and C products, with the equivalent of the surface insulation resistance of B and C products. The coating adhesion and corrosion resistance of B and C products are better than those of A product. From the analysis of morphology and composition, it can be concluded that one reason for the high surface insulation resistance of A product is the thick insulation layer, and the good adhesion level of B and C products is due to the large spinal/particles pinned on the matrix or close to magnesium forsterite, and the corrosion resistance of A product decreases due to the microcracks on the insulating layer surface. 

The uncertainty of measurement of total loss of silicon steel sheet, including the components of the result repeatability, the weight measurement and the length measurement, was evaluated by the evaluation method of class A and class B uncertainty components on the basis of the mathematical model of the measurement of total loss of silicon steel sheet by Epstein frame method. Finally, the extended uncertainty was calculated and the uncertainty report was generated. 

The magnetostrictive phenomenon of oriented electrical steel with different angles to the rolling direction was studied systematically, and it was found that the magnetostrictive strain λ0－p first increased slowly in the negative direction with the increase of the angle between external magnetic field direction and the rolling direction, then increased rapidly in the positive direction after reaching the peak value with the angle about 30°, and reached the positive peak value when the angle reached to 90°. This was mainly related to the angle between the direction of initial domain magnetization and the external magnetic field direction. At the same time, the strain amplitude λp－p was rising generally, which was at first increased slowly and decreased slightly when the strain amplitude between 30° and 60° because of the existing process of the sample from shortening to elongation in length direction. The variation law of A weight velocity LvA and A weight acceleration LaA was consistent with the strain amplitude.