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GB/T 14986.5-2018 PDF English

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GB/T 14986.5-2018: Soft magnetic alloys - Part 5: Iron-aluminum alloys
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GB/T 14986.5-2018145 Add to Cart Auto, 9 seconds. Soft magnetic alloys - Part 5: Iron-aluminum alloys Valid

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GB/T 14986.5-2018: Soft magnetic alloys - Part 5: Iron-aluminum alloys

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.40 H 58 Replacing GB/T 14986-2008 Soft magnetic alloys – Part 5. Iron-aluminum alloys Issued on: MAY 14, 2018 Implemented on: FEBRUARY 1, 2019 Issued by. State Administration for Market Regulation of the People's Republic of China; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 6 4 Classification ... 6 5 Ordering content ... 7 6 Dimensions and shapes ... 7 7 Technical requirements ... 7 8 Test methods ... 10 9 Inspection rules ... 10 10 Packaging, marking and quality certification ... 11 Annex A (Informative) Recommended sample heat treatment system ... 12 Annex B (Informative) Basic physical parameters and typical mechanical properties of alloys ... 14

Foreword

GB/T 14986, Soft magnetic alloys, comprises 5 parts. -- Part 1. General requirements; -- Part 2. Iron-nickel alloys; -- Part 3. Iron-cobalt alloys; -- Part 4. Iron-chromium alloys; -- Part 5. Iron-aluminum alloys. This Part is Part 5 of GB/T 14986. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces the iron-aluminum part of GB/T 14986-2008, High saturation magnetic induction, magnetic compensate alloys depending on temperature variation, corrosion-resisting, iron-aluminum, permanent permeability, soft magnetic alloys. Compared with GB/T 14986-2008, the major technical changes of this Part are as follows. -- it adds rod 1J12 and relevant technical requirements (see 7.4.2 of Clause 6); -- it supplements the basic physical parameters and typical mechanical properties of alloys (see Annex B). This Part was proposed by China Iron and Steel Association. This Part shall be under the jurisdiction of National Technical Committee 183 on Iron and Steel of Standardization Administration of China (SAC/TC 183). The drafting organizations of this Part. Dongbei Special Steel Group Dalian Precision Alloys Co., Ltd., Central Iron and Steel Research Institute, China Metallurgical Information and Standardization Institute. The main drafters of this Part. Xu Xiaoping, Luan Yan, Zhang Jinglin, Dai Qiang, Yan Chengming. The previous editions of the standard replaced by this Part are as follows. -- GBn 203-1983, GBn 203-1988; -- GB/T 15004-1994; Soft magnetic alloys – Part 5. Iron-aluminum alloys

1 Scope

This Part of GB/T 14986 specifies the terms and definitions, classification, ordering content, dimensions, shape, technical requirements, inspection rules, test methods, packaging, marking, quality certification, etc. of iron-aluminum soft magnetic alloys. This Part applies to iron-aluminum soft magnetic cold-rolled strips, warm-rolled strips, hot-rolled (forged) rods and polished or ground rods (hereinafter referred to as alloys).

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this document. GB/T 223.5, Steel and iron – Determination of acid-soluble silicon and total silicon content – Reduced molybdosilicate spectrophotometric method GB/T 223.8, Methods for chemical analysis of iron, steel and alloy – The sodium fluoride separation-EDTA titration method for the determination of aluminium content GB/T 223.59, Iron, steel and alloy – Determination of phosphorus content – Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method GB/T 223.64, Iron, steel and alloy – Determination of manganese content – Flame atomic absorption spectrometric method GB/T 223.79, Iron and steel – Determination of multi-element contents – X-ray fluorescence spectrometry (Routine method) GB/T 223.85, Steel and iron – Determination of sulfur content – Infrared absorption method after combustion in an induction furnace GB/T 223.86, Steel and iron – Determination of total carbon content – Infrared absorption method after combustion in an induction furnace GB/T 228.1, Metallic materials – Tensile testing – Part 1. Method of test at room temperature GB/T 231.1, Metallic materials – Brinell hardness test – Part 1. Test method GB/T 2975, Steel and steel products – Location and preparation of samples and test pieces for mechanical testing GB/T 4340.1, Metallic materials – Vickers hardness test – Part 1. Test method GB/T 6146, Test method for resistivity of precision resistance alloys GB/T 14986.1-2018, Soft magnetic alloys – Part 1. General requirements GB/T 20066, Steel and iron – Sampling and preparation of samples for the determination of chemical composition GB/T 20123, Steel and iron – Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) GB/T 20125, Low-alloy steel – Determination of multi-element contents – Inductively coupled plasma atomic emission spectrometric method

3 Terms and definitions

For the purposes of this document, the following terms and definitions defined in GB/T 14986.1-2018 apply.

4 Classification

In accordance with the main characteristics of alloys, iron-aluminum alloys can be classified into the categories as follows. a) high saturation magnetic induction intensity iron-aluminum alloy 1J6; b) high saturation magnetic induction, high permeability and low residual magnetic induction density iron-aluminum alloy 1J12; c) high saturation magnetostriction coefficient iron-aluminum 1J13; d) high permeability high resistance iron-aluminum alloy 1J16.

Annex A

(Informative) Recommended sample heat treatment system A.1 In general cases, sample is preferably heat treated in pure hydrogen whose dew point is not higher than - 40°C. If vacuum heat treatment is required, it is recommended to be carried out in vacuum whose residual pressure is not greater than 0.1 Pa. A.2 All mechanical processes (such as punching, shearing, winding and deburring) for sample preparation shall be carried out before heat treatment. Before heat treatment, sample shall be removed of oil to ensure cleanliness. After annealing, the surface of sample is preferably smooth. During the process of annealing, adhesion or mechanical deformation is not allowed. A.3 For the recommended sample heat treatment system see Table A.1. Table A.1 – Recommended sample heat treatment system Alloy designation Heating temperature/°C Holding time/h Cooling system Application 1J6 950 ~ 1050 2 ~ 3 Cool to 200°C at the speed of 100°C/h ~ 150°C/h before drawing a discharge 900 ~ 1,000 2 ~ 3 Cool to 250°C before drawing a discharge Applicable to magnetic valve iron core 1J12a 1,050 ~ 1,200 2 ~ 3 Cool to 500°C at the speed of 100°C/h ~ 150°C/h; then cool rapidly (by air blast) to 200°C before drawing a discharge 1J13a 900 ~ 950 2 Cool to 650°C at the speed of 100°C/h; then cool to 200°C at the speed of not greater than 60°C/h before drawing a discharge 780 ~ 800 2 Cool to 650°C at the speed of 100°C/h; Applicable to elements which ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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