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GB/T 6614-2014 PDF in English


GB/T 6614-2014 (GB/T6614-2014, GBT 6614-2014, GBT6614-2014)
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GB/T 6614-2014: PDF in English (GBT 6614-2014)

GB/T 6614-2014
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.50
J 31
Replacing GB/T 6614-1994
Titanium and titanium alloy castings
ISSUED ON. SEPTEMBER 03, 2014
IMPLEMENTED ON. JUNE 01, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3 
1 Scope... 5 
2 Normative references... 5 
3 Ordering instructions... 6 
4 Technical requirements... 6 
5 Test methods... 9 
6 Inspection rules... 10 
7 Marking, quality certificate, packaging, transportation and storage... 12 
Titanium and titanium alloy castings
1 Scope
This Standard specifies the ordering instructions, technical requirements, test methods
and inspection rules, as well as requirements for marking, packaging, transportation and
storage, for titanium and titanium alloy castings.
This Standard applies to machined graphite type, tamping type, metal type and
investment casting type produced titanium and titanium alloy castings.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
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 3623, Titanium and titanium alloy wire
GB/T 4698 (all parts), Methods for chemical analysis of titanium sponge, titanium
and titanium alloys
GB/T 5677, Castings - Radiographic testing
GB/T 6414, Castings - Dimensional Tolerances and Geometrical Tolerances and
Machining Allowances
GB/T 8170, Rules of rounding off for numerical values & expression and judgment
of limiting values
GB/T 8180, Wrought titanium and titanium alloy products packing marking
transporting and storing
GB/T 9443, Steel and iron castings - Liquid penetrant inspection
GB/T 15073, Casting titanium and titanium alloys
GB/T 20967, Non-destructive testing - Visual testing - General principles
3 Ordering instructions
The contract or order form for ordering castings shall state the following.
a) name and number of this Standard;
b) product name, designation or code, supply state, casting quantity and drawing
number;
c) technical requirements and acceptance criteria;
d) other matters that need to be explained.
4 Technical requirements
4.1 Materials
4.1.1 The master alloy ingots used for smelting and pouring shall be smelted by vacuum
arc remelting, induced electricity, plasma arc, induction condensing shell, electron
beam melting and other methods
4.1.2 When using sponge titanium as the raw material, the master alloy ingot shall be
smelted at least twice.
4.1.3 It is allowed to use the processed return material of the same designation as the
raw material.
4.2 Supply state
4.2.1 Castings can be supplied in the following states. as-cast (C), annealed (M), hot
isostatic pressing (HIP) or hot isostatic pressing (HIP) + annealed (M), etc.
4.2.2 When the buyer has special requirements for the supply state of castings, it shall
be negotiated by both parties, and shall be indicated in the contract or technical
agreement.
4.3 Chemical compositions
The chemical compositions of castings shall comply with the provisions of GB/T 15073.
4.4 Mechanical properties
4.4.1 The room temperature mechanical properties of the attached casting samples of
the castings shall meet the requirements in Table 1.
4.4.2 Sampling from the body of the casting is allowed, where the sampling locations
and room temperature mechanical property indexes shall be agreed upon by both parties.
4.6.3 Castings are not allowed to have cracks and penetrating defects; the requirements
for the sealing surface of the castings shall be indicated in the drawing, contract or
technical agreement.
4.6.4 Other surface defects shall meet the visual acceptance criteria listed in the contract
or technical agreement.
4.6.5 When the buyer has special requirements for the surface quality of castings, it
shall be negotiated by both parties.
4.6.6 When it is required by the buyer and indicated in the contract or technical
agreement, the surface of the casting can be subjected to a non-destructive inspection
in accordance with GB/T 9443 or agreed upon by both parties.
4.7 Internal quality
When it is required by the buyer and indicated in the contract or technical agreement,
the castings can be subjected to a radiographic inspection, where the inspection methods
and quality judgment standards shall be in accordance with the requirements of GB/T
5677, or shall be negotiated by both the supplier and the buyer. For thick and large
castings that are difficult to inspect by radiography, other inspection methods can be
used, and the specific inspection methods and quality judgment standards shall be
negotiated by both parties.
4.8 Welding repair
4.8.1 Except for the parts that are not allowed to be repaired -- required by the parts
drawings, contracts or technical agreements -- all exposed pores, shrinkage holes,
porosity, cracks, inclusions and dimensional defects after grinding on the casting are
allowed to be repaired by welding. Before welding repair, the defective parts shall be
thoroughly cleaned until the bright metal surface is exposed.
4.8.2 Defects exposed during processing, or defects found by radiographic inspection,
can be repaired by welding as needed.
4.8.3 Welding repair shall be carried out under vacuum or argon protection; the solder
joints shall not have oxidative bluing.
4.8.4 The filler wire shall generally be made of the material of the corresponding
designation of the casting or the material of the same type and a lower strength level;
its quality shall meet the requirements of GB/T 3623.Before welding, the surface of
the welding wire shall be clean, and if there is oil pollution, it shall be cleaned.
4.8.5 During the welding repair, the supplier shall formulate the welding procedure,
which shall be completed by a welder with corresponding qualifications. The supplier
shall keep relevant process documents and welder qualification certification documents.
5.3 The hardness test of castings shall be carried out in accordance with the provisions
of GB/T 231.1.
5.4 The surface quality inspection of castings shall be carried out according to the visual
method of GB/T 20967 or the provisions of GB/T 9443.
5.5 The radiographic inspection of castings shall be carried out in accordance with the
provisions of GB/T 5677.
6 Inspection rules
6.1 Inspection and acceptance
6.1.1 The castings shall be inspected by the quality supervision department of the
supplier to ensure that the quality of the castings conforms to the provisions of this
Standard, and a quality certificate shall be filled out.
6.1.2 The buyer may re-inspect the received castings according to the provisions of this
Standard. If there is any objection to the re-inspection results, the buyer shall give
feedback to the supplier within 90 days of receiving the castings, otherwise, it is deemed
that the acceptance is accepted.
6.1.3 When the buyer conducts casting inspection at the supplier’s site, the supplier
shall provide the buyer with all reasonable and necessary facilities for the production
of castings in accordance with this Standard. The inspection work of the buyer shall not
interfere with the work of the supplier.
6.1.4 When the supplier and the buyer have any objection to the inspection results, they
shall be resolved through negotiation or an arbitration analysis conducted by a third
party. The arbitration analysis result shall be regarded as the final result of judging
whether it conforms to this Standard.
6.2 Batching
The castings shall be submitted for inspection in batches, and each batch shall consist
of castings of the same designation, the same raw material batch number, the same
production process, and the same state. There shall be no more than 20 smelting heats
per batch.
6.3 Inspection items
Each batch of castings shall be inspected for chemical compositions, mechanical
properties, geometric dimensions, and surface quality. When special inspection items
are required, they shall be negotiated by both parties and shall be indicated in the
contract.
6.4 Sampling location and number of samples
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.