A kind of cold-rolled steel for LED patch support and production method
A LED chip, cold-rolled steel technology, applied in electrical components, circuits, semiconductor devices, etc., can solve problems such as instability, surface roughness not meeting requirements, and large fluctuations in steel performance, and achieve stable product performance. The effect of good shape and simple process
Active Publication Date: 2017-04-26
宝武轻材(武汉)有限公司
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Problems solved by technology
Due to the large range of carbon content and manganese content, and high content of other impurities, it is easy to cause large fluctuations and instability in the performance of the steel plate, which affects the quality of high-speed punching, and the surface roughness does not meet the requirements. However, it affects the soldering performance of chips and gold wires in the functional area.
Method used
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[0034] The present invention is described in detail below:
[0035] Table 1 is the value list of each embodiment of the present invention and comparative example;
[0036] Table 2 is the main process parameter list of each embodiment of the present invention and comparative example;
[0037] Table 3 is a list of the performance tests of the various embodiments of the present invention and comparative examples.
[0038] Each embodiment of the present invention is produced according to the following steps:
[0039] 1) Cold rolling is carried out after hot rolling, rolling according to 3~7 passes, and the total reduction ratio is controlled at 50~90%, of which: the reduction ratio of the last pass is controlled at 8~20%, and the remaining passes The rolling reduction rate of the first pass is 15~35%; the rolling speed of the first pass is controlled at 100~200m / min, and the rolling speed of the remaining passes is 400~700m / min;
[0040] 2) Coiling, control the coiling tension ...
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Abstract
A cold rolled steel for LED surface mount device supports comprises, by weight, 0.01% to 0.06% of C, 0.002% to 0.030% of Si, 0.120% to 0.300% of Mn, at most 0.020% of S, at most 0.020% of P, and 0.02% to 0.07% of Alt. The method includes the production steps that cold rolling is carried out after hot rolling; coiling is carried out; bright annealing is carried out in mixed gases in a bell-type furnace after conventional degreasing is carried out; flattening is carried out; splitting is carried out. The edge camber of the surface of a steel strip is smaller than or equal to 1.5 mm / m, the roughness Ra of the steel strip is smaller than or equal to 0.15 microns, the hardness HV of the steel strip ranges from 120 to 140, the thickness tolerance of the steel strip is controlled to be + / -0.01 to 0.015 mm, the width tolerance of the steel strip is + / -0.05 mm, product performance is stable, the plate shape is good, and the technology is simple.
Description
technical field [0001] The invention relates to a cold-rolled precision steel strip and a production method thereof, and belongs to a cold-rolled steel for an LED patch bracket and a production method thereof. Background technique [0002] Cold-rolled steel strips for veneer brackets are widely used in the electronics industry, and they are also being used in LED patch brackets. The thickness of the cold-rolled steel strip for the LED patch bracket requires an ultra-thin steel strip of 0.11-0.30mm. The cold-rolled steel strip product is used as the veneer bracket of the SMD LED, and the SMD LED product is produced after electroplating, welding the chip, gold wire and plastic sealing. LED patch products are small in size, rich in color, and can be bent at will, can be fixed on the uneven surface, high brightness, adjustable light angle, installation length can be customized according to requirements, energy saving, constant current drive, ultra-low power consumption, The el...
Claims
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IPC IPC(8): H01L33/00
CPCH01L33/005H01L33/0095H01L2933/0008H01L2933/0033
Inventor 张兆丽熊明松毛跃荣刘勇王勇肖书超杜祥生彭大凡吴远东黄菲何振华朱诚友匡伟熊立胡少文石强王丹
Owner 宝武轻材(武汉)有限公司