Low carbon cold-rolled steel sheet for LED lead frame and production method thereof

A lead frame and cold-rolled steel sheet technology, which is applied to low-carbon cold-rolled steel sheets for LED lead frames and their production fields, can solve the problems of uneven hardness, poor aging resistance, and high surface roughness, and achieve a "pie shape" of crystal grains. The effect of increased degree, good processing and aging resistance, and high surface quality

Active Publication Date: 2016-03-30
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-carbon cold-rolled steel plate for LED lead frame and its production method, which mainly solves the technical problems of uneven hardness, high surface roughness and poor aging resistance of the existing low-carbon cold-rolled steel plate for LED lead frame

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  • Low carbon cold-rolled steel sheet for LED lead frame and production method thereof

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Embodiment Construction

[0039] This implementation selects product specification to be 0.5mm*836mm, below in conjunction with embodiment 1 ~ 3 and comparative example---Chinese patent application number is disclosed in the patent application of CN200580032921.5, the present invention is further described, as table 1 ~ table 4 shown.

[0040] Table 1 Chemical composition of the present invention (% by weight), the balance is Fe and unavoidable impurities.

[0041] element C% Si% Mn% P% S% Alt% B% N% this invention 0.025-0.05 ≤0.03 0.15-0.25 ≤0.020 ≤0.010 0.025-0.048 0.001-0.0014 ≤0.0035 Example 1 0.0268 0.0119 0.2215 0.0135 0.0086 0.0426 0.0013 0.002 Example 2 0.0392 0.0117 0.1857 0.0134 0.0085 0.0308 0.0010 0.00198 Example 3 0.0485 0.0116 0.1951 0.0130 0.0088 0.0375 0.0011 0.0028 comparative example 0.02-0.055 ≤0.04 0.2-0.3 ≤0.015 ≤0.015 0.05-0.25 0.0009-0.0015 ≤0.0060

[0042] According to the requirements of...

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Abstract

The invention relates to a low carbon cold-rolled steel sheet for a LED lead frame and a production method thereof, and mainly solves the technical problems that the low carbon cold-rolled steel sheet for the LED lead frame in prior art has nonuniform hardness, high surface roughness and bad aging-resistance. The production method comprises the following steps: smelting according to components, molten iron desulphurization, complex top-bottom blowing converter smelting, argon blowing from bottom of a ladle, protective casting with argon blowing in whole course, heating in a slab heating furnace, rough rolling, finish rolling, reeling for obtaining a hot-rolled steel coil, uncoiling, pickling, cold rolling, annealing in a vertical type continuous annealing furnace, flattening, and reeling for obtaining a finished product with a thickness of 0.4-0.5mm; the finishing temperature of the finish rolling is 860-900 DEG C, the reeling temperature of the hot rolling is 620-660 DEG C, the cold rolling reduction is 75-85%, the temperature scope of a soaking zone of the vertical type continuous annealing furnace for a band steel in hard rolled state after cold rolling is 710-730 DEG C, the soaking time for the band steel in the vertical type continuous annealing furnace is 105-120 s, and temper elongation is 1.0-1.4%. The low carbon cold-rolled steel sheet is mainly used for the LED lead frame.

Description

technical field [0001] The invention relates to a low-carbon cold-rolled steel plate and a production method thereof, in particular to a low-carbon cold-rolled steel plate for an LED lead frame and a production method thereof. Background technique [0002] Light emitting diode (light emitting diode, LED) is known as the fourth generation light source in human history. It has many advantages such as high luminous efficiency, small size, safety, long life, etc., and is energy-saving and environmentally friendly. It is widely used in agriculture, fishery, medical treatment, communication and other fields. , has broad development prospects. [0003] The lead frame of the LED bracket is the basic component of the LED product. In order to reduce the cost, the industry has begun to use low-carbon steel instead of the original copper material; in order to ensure corrosion resistance, the surface of the low-carbon steel is first plated with copper and then silver-plated. The main ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C21D8/02
Inventor 赵楠刘学伟周丽萍王海军曹博蕊李丹曹孝平申庆波
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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