Foreword
This document is drafted in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardized documents".
This document replaces GB/T 5156-2013 "hot extruded magnesium alloy profiles", compared with GB/T 5156-2013, in addition to structural adjustments and editorial changes, the main technical changes are as follows
Compared with GB/T 5156-2013, in addition to structural adjustment and editorial changes, the main technical changes are as follows.
a) Added Mg9999, VW75M, M1C, M2S, ZE20M, ZK60A, ZM51M grades (see 4.1).
b) Added quality assurance requirements for ingots for profiles (see Chapter 5).
c) Changed the requirement of twist degree (see 6.2.2.6, 3.3.5 of 2013 version)
d) Added mechanical properties of VW75M, M1C, M2S, ZE20M, ZK60A, ZM51M alloys (see 6.4).
e) The diagram of the slope of the cut has been added (see 7.2.6).
f) Added Rockwell hardness, Brinell hardness and Vickers hardness test methods for profiles (see 7.4).
g) changed the sampling (see 8.4, 2013 version of 5.4).
h) changed the requirements for packaging, marking, transport and storage of magnesium and magnesium alloys (see Chapter 9, Chapter 6 of the 2013 edition).
Please note that some of the contents of this document may relate to patents. The issuer of this document does not assume responsibility for identifying patents.
This document is presented by the China Nonferrous Metals Industry Association.
This document is attributed to the National Technical Committee for Standardization of Non-ferrous Metals (SAC/TC243).
The successive versions of this document and the document it replaces were issued as follows.
--- This document was first issued in 1985, the first revision in 2003, the second revision in 2013, this is the third revision.
Magnesium and magnesium alloy hot extrusion profiles
1 Scope
This document specifies the classification of magnesium and magnesium alloy hot extrusion profiles, quality assurance, requirements, test methods, inspection rules and signs, packaging, transportation, storage and quality certification and ordering,
Transportation, storage and quality certificate and order form (or contract) content.
This document applies to magnesium and magnesium alloy hot extrusion profiles (hereinafter referred to as profiles).
2 normative reference documents
The content of the following documents through the normative references in the text and constitute the essential provisions of this document. Among them, note the date of the cited documents, only
The date corresponds to the version applicable to this document; do not note the date of the referenced documents, the latest version (including all the change orders) applicable to this document.
GB/T 230.1 Rockwell hardness test for metallic materials Part 1: Test method
GB/T 231.1 Brinell hardness test for metallic materials Part 1: Test method
GB/T 3499 primary magnesium ingot
GB/T 4297 Deformed magnesium alloy low times the organization test method
GB/T 4340.1 Vickers hardness test for metallic materials Part 1: Test method
GB/T 5153 Deformed magnesium and magnesium alloy grades and chemical composition
GB/T 8170 numerical modification rules and limit values of the representation and determination
GB/T 13748 (all parts) magnesium and magnesium alloy chemical analysis methods
GB/T 16865 deformation of aluminum, magnesium and its alloy processing products with tensile test specimens and methods
GB/T 17432 deformed aluminum and aluminum alloy chemical composition analysis sampling method
GB/T 32792 magnesium alloy processing products packaging, marking, transportation, storage
YS/T 627 deformed magnesium and magnesium alloy round cast ingot
3 Terminology and definitions
This document does not need to define the terms and definitions.
4 Classification
4.1 Product classification
The grade and state of the profile should be in accordance with the provisions of Table 1. When other grades and states are required, the supply and demand sides should consult and specify in the order form (or contract).
4.2 Product markings
The marking of the profile in accordance with the product name, standard number, grade, state, size, specification order.
5 Quality Assurance
The dimensional deviation, low-frequency organization and appearance quality of the ingots used in the production of profiles shall conform to the provisions of YS/T 627.
6 Requirements
6.1 Chemical composition
The chemical composition of Mg9999 shall conform to the provisions of GB/T 3499, and the chemical composition of other grades shall conform to the provisions of GB/T 5153.
6.2 Dimensional deviation
6.2.1 General requirements
The allowable deviation of the profile dimensions shall conform to the provisions of the technical drawings signed between the supply and demand sides or refer to the "Aluminum and Aluminum and Magnesium Alloy Extrusion Profiles Atlas".
If the dimensional deviation is not specified in the technical drawings or "Aluminum and Aluminum and Magnesium Alloy Extrusion Profiles Catalogue", the dimensional deviation of the profile shall conform to the provisions of 6.2.2.
If the demand side has special requirements on dimensional deviation, both sides shall consult and specify in the order form (or contract).
6.2.2 Other requirements
6.2.2.1 Deviation of cross-sectional dimensions
The deviation of cross-sectional dimensions shall conform to the provisions of Table 2.
6.2.2.2 Angular deviation
The allowable deviation of angle is ±2°.
6.2.2.3 Plane clearance
6.2.2.3.1 The plane gap of solid profile shall not be greater than 2% of the plane width of the inspected profile, but the maximum gap value shall not exceed 1mm.
6.2.2.3.2 The plane gap between the semi-hollow profile and the hollow profile shall not be greater than 2.5% of the plane width of the inspected profile, but the maximum gap value shall not exceed 2mm.
6.2.2.4 Curvilinear clearance
When the curved surface clearance is required, the demander shall provide the inspection sample, and the clearance shall not be more than 1% of the arc length. The demand side does not provide the sample plate can not be tested.
6.2.2.5 Bend
Curvature should be in accordance with the provisions of Table 3.
6.2.2.6 Twisting degree
The twisting degree of each meter shall not be more than 5% of the nominal width of the profile, and the twisting degree of the whole length shall not be more than 12% of the nominal width of the profile.
6.2.2.7 Radius of rounded corners
The deviation of the radius of the rounded corners shall conform to the provisions of Table 4.
6.2.2.8 Length
6.2.2.8.1 The allowable deviation shall be +20mm for the profile delivered in fixed length or double length, and in the case of delivery in double length, 5 mm of sawing shall be left for each double length.
6.2.2.8.2 The delivery length of profiles not delivered in fixed length shall be 1000mm~6000mm.
6.2.2.9 Cutting slope
Both ends of the profile shall be cut flush, and the slope of the cut shall not exceed 3°.
6.2.2.10 Waviness
Profile wave height should not exceed 1mm, not more than 1 wave per meter length, but the height of less than 0.2mm waves are not counted.
6.3 Room temperature tensile mechanical properties
Room temperature tensile mechanical properties of the profile should be consistent with the provisions of Table 5, the demand side has other special requirements, should be negotiated between the supply and demand, and in the order
The bill of lading (or contract) in the specified.
6.4 Hardness
If the demander has hardness requirements or the profile cannot be tested for room temperature tensile mechanical properties, both the supplier and the demander shall negotiate and specify the hardness value in the order form (or contract).
The hardness value requirement and test method shall be specified in the order form (or contract).
7 Test methods
7.1 Chemical composition
7.1.1 Analysis and arbitration of the chemical composition of the profile according to GB/T 13748 (all parts) method, sampling should be consistent with the provisions of GB/T 17432.
7.1.2 Analysis of the value of the determination should be used to modify the comparison method, the value of the rules of modification according to the relevant provisions of GB / T 8170, the number of modifications should be
GB / T 3499 and GB / T 5153 in the limit of the number of consistent.
7.2 Dimensional deviation
7.2.1 Deviation of cross-sectional dimensions
Measurement should be used when the accuracy of not less than 0.02mm gauges.
7.2.2 Plane clearance
When the profile is placed on the inspection platform and the profile is stabilized by its own weight, the maximum clearance between the profile and the platform is measured along the width direction
(Tp), as shown in Figure 1, which is the plane clearance of the profile (Tp).
7.2.3 Curvilinear clearance
As shown in Fig. 2, the standard sample is pressed against the curved surface of the profile, and the maximum clearance value (Tq) between the curved surface of the profile and the standard sample is measured, which is
is the surface clearance of the profile (Tq).
7.2.4 Twisting degree
7.2.4.1 When measuring the twist degree, the profile is placed on the inspection platform and one end of the profile is pressed against the platform, and when the profile is stabilized by its own weight, the twist degree is measured.
When the profile is stabilized by its own weight, the clearance value between the profile buckling and the platform is measured. Calipers, stoppers or special tools can be used for testing.
7.2.4.2 When measuring the full-length twist degree of the profile, as shown in Figure 3, the difference between T1 and T2 is the difference between T2 and T1, which is the full-length twist degree of the profile.
The difference between T2 and T1 is the full-length twist degree of the profile.
7.2.4.3 To measure the twist degree of any one meter, the ends of any one meter are selected as points A and B on the profile, as shown in Fig. 3, and the full-length twist degree is measured by the method of
Using the method of measuring the twist degree, determine the height of warping at point A and point B respectively, and calculate the difference between the twist degree of point A and point B as the twist degree of the meter.
7.2.5 Round corner radius
The radius (R1, R2) of the rounded corners of the profile should be measured by using the angle ruler and other gauges, as shown in Figure 4.
7.2.6 Slope of cut
When measuring, the profile is placed on the inspection platform, and after the profile is stabilized, the angle (β) between the end face of the profile and the inflection ruler is measured with the inflection ruler, and the measurement method is shown in Figure 5.
The measurement method is shown in Figure 5.
8 Inspection rules
8.1 Inspection and acceptance
8.1.1 The profile shall be inspected by the supplier to ensure that the product quality conforms to the provisions of this document and the order form (or contract), and fill in the quality certificate.
8.1.2 The demander shall retest the received products according to the provisions of this document. The results of the re-inspection and the provisions of this document and the order form (or contract)
If it is not in conformity with the provisions of this document and the order form (or contract), it shall be put forward in writing to the supplier, and the supply and demand sides shall negotiate to solve the problem. Objections belonging to the appearance quality and dimensional deviation shall be raised within one month from the date of receipt of
Within one month from the date of receipt of the product, other performance objections should be raised within three months from the date of receipt of the product. For arbitration, the supply and demand
Both parties shall jointly conduct arbitration sampling at the demand side.
8.2 Group Batch
Profiles shall be submitted in batches for acceptance, and each batch shall be composed of the same alloy grade, state, and specification, with unlimited batch weight.
8.3 Inspection items
Each batch of profiles shall be factory inspected, and the inspection items shall be chemical composition, dimensional deviation, room temperature tensile mechanical properties, hardness, low-frequency organization
and appearance quality inspection.
8.4 Sampling
Sampling of profiles shall conform to the provisions of Table 6.
Extrusion tail, each batch (or heat treatment furnace) by the number of roots to take 10%, not less than 2, each taking a sample
8.5 Determination of test results
8.5.1 If the chemical composition of any specimen fails, the profile can distinguish the melting time, the melting time represented by the specimen is judged to be unqualified, and the other melting time is judged to be unqualified.
The profiles will be tested in turn and judged one by one. If the profile cannot be distinguished from the molten one, the batch of profiles shall fail.
8.5.2 If the dimensional deviation of any product fails to pass, the profile is judged to be unqualified.
9 Sign, packaging, transportation, storage and quality certificate
9.1 Marking
9.1.1 The following marks shall be put on the front end of the accepted profiles (or the label with the following marks shall be hung).
a) Inspection seal of the technical supervision department of the supplier.
b) batch number.
c) Qualified grade.
d) the state of supply.
9.1.2 The width of the flat part of the profile is less than 40mm or the shape of the front of the profile is inconvenient to print two tags per batch (or per box).
The label should be marked with the alloy number, supply status, batch number and inspection mark of the technical supervision department of the supplier.
9.1.3 The packaging box of the profile should be marked with reference to the provisions of GB/T 32792.
9.2 Packaging, transportation and storage
9.2.1 Profiles should be oiled packaging, if there are special requirements, should be determined by mutual agreement between the supply and demand, and indicated in the order form (or contract).
9.2.2 Profile packaging, transportation, storage of other requirements refer to the provisions of GB / T 32792.
9.3 Quality certificate
Each batch of profiles should be accompanied by a product quality certificate, which states.
a) Name of the supplier.
b) Product name.
c) Brand.
d) Condition.
e) Size and specification.
f) Product lot number.
g) Net weight and number of pieces.
h) Analytical test results of each item.
i) Inspection seal of the supplier's quality inspection department.
j) This document number.
k) packaging date (or factory date).
10 Order form (or contract) content
Order form (or contract) for the products listed in this document should include the following.
a) Product name.
b) Brand number.
c) Status.
d) Size and specification.
e) Weight (or number of pieces).
f) Special requirements of the demander.
---Special dimensional deviation requirements.
---Special room temperature tensile properties requirements.
---Special hardness requirements.
---Special appearance quality requirements.
---Special packaging requirements.
---Other special requirements.
g) This document is numbered.
Foreword
1 Scope
2 normative reference documents
3 Terminology and definitions
4 Classification
5 Quality Assurance
6 Requirements
7 Test methods
8 Inspection rules
9 Sign, packaging, transportation, storage and quality certificate
10 Order form (or contract) content
