A method for improving the rolling yield of high-silicon non-oriented electrical steel
A technology of oriented electrical steel and yield rate, which is applied in the field of electrical steel rolling, can solve the problems of high-silicon non-oriented electrical steel easy-to-break strips, etc., and achieve the effect of increasing the bending angle, overcoming small reverse bending, and improving yield
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Embodiment 1
[0022] A method for improving the rolling yield of high-silicon non-oriented electrical steel provided by an embodiment of the present invention, wherein the Si content of high-silicon non-oriented electrical steel is 2.95wt%, comprises the following steps:
[0023] Step 101: Before the twenty-high rolling mill starts rolling, the strip steel is preheated. The temperature of the strip steel preheating should be between 65°C and 75°C. In the embodiment of the present invention, the strip steel preheating temperature is 75°C ;
[0024] Step 102: Due to reasons such as rolling rhythm, strip heat dissipation during strip threading, equipment influence, etc., the temperature at the head and tail of the strip is lower than that in the middle to prevent the strip from being broken at the head and tail. Before the first pass of rolling, the strip is rolled When the uncoiler is threading, the strip is pre-wound on the coiler for 10 turns, and then rolled, so that the strip at the tempe...
Embodiment 2
[0034] A method for improving the rolling yield of high-silicon non-oriented electrical steel provided in the embodiments of the present invention, wherein the Si content of high-silicon non-oriented electrical steel is 3.24wt%, comprising the following steps:
[0035] Step 201: Before the twenty-high rolling mill starts rolling, the strip steel is preheated. The temperature of the strip steel preheating should be between 65°C and 75°C. In the embodiment of the present invention, the strip steel preheating temperature is 65°C ;
[0036] Step 102: Due to reasons such as rolling rhythm, strip heat dissipation during strip threading, equipment influence, etc., the temperature at the head and tail of the strip is lower than that in the middle to prevent the strip from being broken at the head and tail. Before the first pass of rolling, the strip is rolled When the uncoiler is threading, the strip steel is pre-wound 12 times on the coiler, and then rolling is started, so that the par...
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