A method for improving the rolling yield of high-silicon non-oriented electrical steel
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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
Active Publication Date: 2016-01-13
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a method for increasing the rolling yield of high-silicon non-oriented electrical steel, which solves the technical problem that the existing high-silicon non-oriented electrical steel is easily broken during the 20-roll rolling process
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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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Abstract
The invention discloses a method for improving the yield of rolled high-silicon non-oriented electrical steel and belongs to the technical field of electrical steel rolling. The method for improving the yield of the rolled high-silicon non-oriented electrical steel comprises the steps that strip steel is preheated before rolled by a twenty-high roll mill, the strip steel is pre-wound around a recoiling machine when threading is carried out on the strip steel by an uncoiler, the strip steel is rolled by all the tracks of the twenty-high roll mill in sequence, the flow of emulsified liquid of the strip steel is adjusted to enable the flow rate of the emulsified liquid at the position of the inlet of each track of the twenty-high roll mill to be 2200L / min-2500L / min and the flow rate of the emulsified liquid at the position of the outlet of each track of the twenty-high roll mill to be 1900L / min-2200L / min, and the temperature of the strip steel at the position of the outlet of each track of the twenty-high roll mill is 70-90 DEG C. According to the method for improving the yield of the rolled high-silicon non-oriented electrical steel, due to the fact that the temperature of the strip steel at the position of the outlet of each track of the twenty-high roll mill is adjusted to be 70-90 DEG C, rolling can be proceeded smoothly.
Description
technical field [0001] The invention belongs to the technical field of electrical steel rolling, and in particular relates to a method for improving the rolling yield of high-silicon non-oriented electrical steel. Background technique [0002] High-silicon non-oriented electrical steel is mainly used for medium and large motors and generators with large capacity. It is difficult to cool large motors and generators. An important measure to improve the performance of motors and generators is that the motor must use low-iron loss high-silicon non-oriented electrical steel core materials. However, its production process is complicated and difficult, especially for high-silicon (Si content ≥ 2.9wt%) Strip breakage during 20-high rolling of electrical steel has become a problem for manufacturers. As the silicon content increases, the yield strength, tensile strength, hardness and deformation resistance of the strip steel increase, while the elongation and reverse bending of the m...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/02B21B37/74B21B37/58
Inventor 王付兴胡志远陈凌峰刘磊张保磊蒋自武匡元辉商光鹏
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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