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GB/T 32185-2015 English PDF (GBT32185-2015)

GB/T 32185-2015 English PDF (GBT32185-2015)

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GB/T 32185-2015: Titanium alloy large-sized bars

This Standard specifies the requirements, test methods, inspection rules, package, mark, transportation, storage, and purchasing order (contract) contents of the titanium alloy large-size bars.
GB/T 32185-2015
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.150.50
H 64
Titanium Alloy Large-Size Bars
ISSUED ON. DECEMBER 10, 2015
IMPLEMENTED ON. NOVEMBER 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Requirements ... 5
4 Test Methods ... 10
5 Inspection Rules ... 10
6 Package, Mark, Transportation, Storage, and Quality Certificate ... 12 7 Purchasing Order (or Contract) Contents ... 13
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard was proposed by China Non-Ferrous Metals Industry Association. This Standard shall be under the jurisdiction of National Technical Committee for Standardization of Non-Ferrous Metals (SAC/TC 243).
Drafting organizations of this Standard. BaoTi Group Co., Ltd., Hunan Goldsky Titanium Technology Co., Ltd., Western Superconducting Technologies Co., Ltd., Zhonghang Tianhe (Tangshan) Titanium Industry Co., Ltd., Baosteel Special Metals Co., Ltd., Baoji Titanium Industry Co., Ltd.
Chief drafting staffs of this Standard. Hu Zhijie, Li Weiqing, Feng Junning, Min Xinhua, Yang Huili, Ma Zhongxian, Song Ruichi, Li Xianjun, Yang Sheng, Peng Hui, Feng Ran, and Zhao Haitao.
Titanium Alloy Large-Size Bars
1 Scope
This Standard specifies the requirements, test methods, inspection rules, package, mark, transportation, storage, and purchasing order (contract) contents of the titanium alloy large-size bars.
This Standard is applicable to the hot-forging, hot-rolling methods generated titanium alloy large-size round bars (hereinafter refers to as bars).
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1. Method of Test at Room Temperature
GB/T 2039-1997 Metallic Materials - Creep and Stress - Rupture Test in Tension GB/T 3620.1 Designation and Composition of Titanium and Titanium Alloys GB/T 3620.2 Titanium and Titanium Alloys - Permissible Variations of Chemical Composition for Wrought Product Analysis
GB/T 4338 Metallic Materials - Tensile Testing at Elevated Temperature
GB/T 4698 (all parts) Methods for Chemical Analysis of Titanium Sponge, Titanium and Titanium Alloys
GB/T 5168 Microstructure and Macrostructure Examination for ??-?? Titanium Alloys GB/T 5193 Method of Ultrasonic Inspection for Wrought Titanium and Titanium Alloy Products
GB/T 8180 Wrought Titanium and Titanium Alloy Products Packing, Marking, Transporting and Storing
GB/T 23605 Method for ?? Transus Temperature Determination of Titanium Alloys 4 Test Methods
4.1 The arbitration analysis of chemical composition shall be performed as per GB/T 4698.
4.2 The tensile test at room temperature shall be performed as per GB/T 228.1. The tensile test at room temperature shall select R7 sample.
4.3 The tensile test at elevated temperature shall be performed as per GB/T 4338. 4.4 The endurance test shall be performed as per GB/T 2039-1997.
4.5 The size and shape shall be inspected by the measuring tool with corresponding precision.
4.6 The ?? transition temperature test shall be performed as per GB/T 23605 or the differential thermal method.
4.7 The ultrasonic flaw detection shall be performed as per GB/T 5193.
4.8 The macrostructure and microstructure shall be inspected as per GB/T 5168. 4.9 The surface conditions shall be performed as per the standard block comparison method of surface roughness.
4.10 The appearance quality shall be visually inspected.
5 Inspection Rules
5.1 Inspection and acceptance
5.1.1 The bars shall be inspected by the Quality Inspection Department of the supplier, ensuring the bars conforming to the provision of this Standard; and fill in the quality certificate.
5.1.2 The purchaser is required to re-inspect the received bars according to the provision of this Standard. If the re-inspection results is inconsistent with the provision of this Standard, it shall be proposed to the supplier in written form, and solved through the negotiation between the purchaser and supplier. The objection belonging to the surface quality and size deviation shall be proposed within 1 month since the date of reception of the product; while other objection shall be proposed within 3 months since the date of reception of the product. In the case of arbitration, the sampling of arbitration shall be performed jointly by both the supplier and the purchaser. 5.2 Batch
double quantity of specimen shall be taken from such batch of bars (including the originally tested bars) to re-inspect the disqualified items; if the re-inspection results are still disqualified, then such batch of bars are judged disqualified. However, the supplier is allowed to take sampling and repeat the heat treatment for such batch of bars, and re-inspect all inspection items. The repeat heat treatment is only for once. 5.4.4 The test results of macrostructure shall be judged as per the following rules. a) In the macrostructure test, if it is judged to be brittle segregation (its hardness is significantly higher than the segregation of the matrix; the common ones are like oxygen enriched segregation, nitrogen enriched segregation), such batch of bars are judged disqualified; if it is judged to be non-brittle segregation, the defects are allowed to removed, and then form new batch of bars and deliver.
b) If the macrostructure has cracks, nonmetallic inclusions, and shrinkage; the supplier is allowed to inspect piece by piece, remove the defects, and deliver the qualified bars.
c) In the macrostructure test, if there are suspension or controversy against whether belonging to the clear grains, it shall be subject to the microstructure test results. If the microstructure test is the two-phase region working structure, there is no completely original ?? grain boundary, then the macrostructure is judged qualified, otherwise judged disqualified.
5.4.5 When microstructure is judged disqualified, such batch of bars shall be judged disqualified; however, the supplier is allowed to inspect piece by piece, and deliver the qualified ones.
6 Package, Mark, Transportation, Storage, and
Quality Certificate
6.1 Product mark
Each bar tested qualified shall be marked with the following contents at least. a) Grade;
b) Specification;
c) Supply state;
d) Batch number or furnace number.
6.2 Package, mark, transportation, and storage

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