GB/T 26492.5-2011Defects of wrought aluminium and aluminium alloys ingots and products - Part 5: Defects for tubes,rods or bars,profiles,wires (English PDF)
变形铝及铝合金铸锭及加工产品缺陷 第5部分：管材、棒材、型材、线材缺陷
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 12, 2011
Implementation date
February 1, 2012
Scope
GB/T 26492.5-2011 is the English-translated version of 变形铝及铝合金铸锭及加工产品缺陷 第5部分：管材、棒材、型材、线材缺陷.
GB/T 26492.5-2011 is the Chinese standard "Defects of wrought aluminium and aluminium alloys ingots and products - Part 5: Defects for tubes,rods or bars,profiles,wires".
Its scope clause reads: This section provides aluminum and aluminum alloy tubes, definitions rods, profiles and wire products, common defects, features, and analyzes its main production Health reasons.
This section applies to the determination and analysis of aluminum and aluminum alloy tubes, rods, profiles, wire defects. Its clauses include definition of defects, features and main causes.
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Document preview — GB/T 26492.5-2011
National Standard of the People's Republic of China
- ICS
- 77.150.10
- Classification
- H 60
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Definition of Defects, features and main causes
- 2.1 Bubble blister
- 2.2 From the skin peeling
1 Scope
This section provides aluminum and aluminum alloy tubes, definitions rods, profiles and wire products, common defects, features, and analyzes its main production
Health reasons.
This section applies to the determination and analysis of aluminum and aluminum alloy tubes, rods, profiles, wire defects.
2 Definition of Defects, features and main causes
2.1 Bubble blister
Continuous or discontinuous raised bubbly cavity surface of the article (Figure 1).
The main causes.
a) Extrusion or extrusion pad water, oil and dirt;
b) the air enters the metal surface during extrusion;
c) lubricants in water;
d) There ingot loose, porosity;
e) product hydrogen content is too high;
f) Extrusion temperature and the ingot temperature is too high.
Figure 1 Bubble
2.2 From the skin peeling
A thin layer on the surface of the article is attached, there are local peeling (Figure 2).
The main causes.
a) extrusion cylinder is not clean;
b) extrusion cylinder and pressure pads mismatch;
c) a metal stick with a long work on mold or die orifice.
Figure 2 from the skin […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.
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Related Standards
GB/T 26492.1-2011 — Defects of wrought aluminium and aluminium alloys ingots and products - part 1: Defects for ingots
GB/T 26492.2-2011 — Defects of wrought aluminium and aluminium alloy ingots and products - Part 2: Defects for roll-casting strips
GB/T 26492.3-2011 — Defects of wrought aluminium and aluminium alloys ingots and products - Part 3: Defects for plates,sheets and strips
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GB/T 26492.5-2011
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