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Aluminum alloy plate and process for producing the same

A manufacturing method and aluminum alloy technology, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve problems such as melting residues, achieve good surface properties, suppress surface defects, and improve strength and other characteristics

Inactive Publication Date: 2011-01-26
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, even if there is no defect on the original plate, after the above-mentioned surface treatment, there is a problem of black line-shaped surface defects of about 3 μm in length in the direction parallel to rolling due to the melting residue of Ti-B described later. Improvement becomes a top priority

Method used

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  • Aluminum alloy plate and process for producing the same
  • Aluminum alloy plate and process for producing the same
  • Aluminum alloy plate and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] [Example 1: Test material manufacture]

[0126] (Al-Mg alloy)

[0127] Aluminum alloys (5k: JIS5052 alloy, 5l: JIS5083 alloy, 5v without Ti, B) having compositions of alloy Nos. 5a to 5v shown in Table 1 were melted, dehydrogenated, filtered, and cast to produce An ingot with a plate thickness of 500 mm. This ingot was heat-treated at 500° C. for 4 hours, and then hot-rolled to manufacture aluminum alloy hot-rolled sheets with a thickness of about 25 mm and a thickness of about 20 mm. This aluminum alloy hot-rolled sheet was cut into a rolling direction length of 2000 mm x width of 1000 mm, and then the rolling surface (both sides) was smoothed to obtain an aluminum alloy thick plate (cut plate) with a thickness of 20 mm. In addition, for an alloy containing Ti, a Ti-B master alloy is added in order to prevent cracks in the ingot. The effects of smoothing were compared by three methods: end mill processing, end mill processing + hairline processing (using belt-polish...

Embodiment 2

[0167] [Example 2: Test material manufacture]

[0168] (Al-Mg-Si alloy)

[0169] Aluminum alloys having compositions of alloy Nos. 6a to 6g shown in Table 4 were melted, dehydrogenated, filtered, and then cast to produce ingots with a plate thickness of 500 mm. This ingot was hot-rolled to produce aluminum alloy hot-rolled sheets with a thickness of about 25 mm and a thickness of about 20 mm. This aluminum alloy hot-rolled sheet was cut into a rolling direction length of 2000 mm x width of 1000 mm, and then the rolling surface (both sides) was smoothed to obtain an aluminum alloy thick plate (cut plate) with a thickness of 20 mm. In addition, for the aluminum alloy containing Ti, in order to prevent the ingot from cracking, a Ti-B master alloy is added. The effects of smoothing were compared by three methods: end mill processing, end mill processing + hairline processing (using belt-polished nonwoven fabric), and hairline processing. In addition, the aluminum alloy hot-roll...

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Abstract

An aluminum alloy plate is provided which is suitable for use as members for apparatuses relating to semiconductors. The alloy plate is satisfactory in plate thickness precision and flatness and can be inhibited from having surface defects. Also provided is a process for producing the plate. An aluminum alloy comprising given components is melted (melting step), and hydrogen gas and inclusions are removed therefrom (dehydrogenation step and filtration step). This melt is cast into an ingot (casting step). According to need, the ingot is homogenized by a heat treatment (soaking step). This ingot is hot-rolled to a given thickness (hot-rolling step), cut (cutting step), and finished by smoothening the surfaces (smoothening step). According to need, the plate may be subjected to straightening (straightening step) and a heat treatment, e.g., annealing (annealing step). The aluminum alloy plate obtained has a surface flatness of 0.2 mm or less per m of rolling-direction length and has fluctuations in plate thickness within +-0.5% of a desired plate thickness.

Description

technical field [0001] The invention relates to an aluminum alloy thick plate and a manufacturing method thereof. Background technique [0002] In general, aluminum alloy materials are used in various applications such as electrical and electronic parts and their manufacturing equipment, daily necessities, and mechanical parts, in addition to semiconductor-related equipment such as substrates, conveying equipment, and vacuum equipment chambers. In addition, as a die material for a press die, steel, cast steel, etc. are used for mass production, and zinc alloy casting materials, aluminum alloy casting materials, etc. are used for trial production. In addition, in recent years, stretched materials such as rolled materials and forged materials of aluminum alloys have been popularized for medium and small-volume production in view of the trend of increasing varieties and reducing quantities. [0003] Among them, for rolled materials of aluminum alloy, such as figure 2 As shown...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/00
CPCC22C21/06C22B21/06C22C21/10C22F1/05C22F1/04C22F1/047C22B21/066C22C21/02B21B2003/001C22C21/08
Inventor 小林一德加藤友晴稻叶隆
Owner KOBE STEEL LTD
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