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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 5318-1985 Sintered metal materials (excluding hardmetals) without notch impact test piece.
Compared with GB/T 5318-1985, this standard has the main changes as follows:
——Chapter 3 "Normative references" is added;
——Editions of normative references are updated;
——Editorial changes are made.
This standard has been redrafted and modified from ISO 5754:1978 Sintered metal materials, excluding hardmetals—Unnotched impact test piece, MOD.
Compared with ISO 5754:1978, this standard has the following technical differences with reason:
——Adjustment with technical differences had been made to normative references of this standard in order to adapt to the technical conditions of China. Chapter 3 "Normative references" embodies a concentrated reflection of the adjustment. To be specific,
•ISO 83 is deleted;
•ISO 148-1 is replaced by GB/T 229-2007 which is modified in relation to international standard.
This standard was proposed by China Nonferrous Metals Industry Association.
This standard is under the jurisdiction of National Technical Committee on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
The previous edition of this standard is as follows:
——GB/T 5318-1985.
Sintered metal materials (excluding hardmetals)
without notch impact test piece
1 Scope
This standard specifies the dimensions of an unnotched impact test piece of sintered metal materials (excluding hardmetals). The test piece may be obtained directly by pressing and sintering or by machining a sintered part.
This standard applies to unnotched impact test piece for sintered metal materials (excluding hardmetals).
2 Field of application
This standard applies to all sintered metal and alloys, with the exception of hardmetals. However, for certain sintered materials with low porosity or high ductility, it may be more appropriate to use a notched test piece which, in this case, will give results with less scatter (In this case, refer to GB/T 229-2007).
Note: For sintered metal porous materials, the results obtained from impact tests are not necessarily very accurate and should not be compared with results obtained from tests on solid metals.
3 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 229-2007 Metallic materials—Charpy pendulum impact test method (ISO 148-1: 2006, MOD)
4 Dimensions of test piece
4.1 The dimensions of test piece are as shown in Figure 1 and Table 1.
Figure 1 Dimensions of test piece
Table 1 Dimensions of test piece Values in millimeters
L A B
55±1 10±0.2 10±0.2
4.2 The test piece shall be marked in such a way that the direction of pressing may be identified. The impact test shall be carried out on a Charpy impact testing machine, in accordance with GB/T 229-2007. Unless otherwise specified, the direction of impact shall be normal to the pressing direction.
Foreword i
1 Scope
2 Field of application
3 Normative references
4 Dimensions of test piece
ICS 77.160
H 16
中华人民共和国国家标准
GB/T 5318—2017
代替GB/T 5318—1985
烧结金属材料(不包括硬质合金)
无切口冲击试样
Sintered metal materials(excluding hardmetals)
without notch impact test piece
(ISO 5754:1978,Sintered metal materials,excluding hardmetals—Unnotched impact test piece,MOD)
2017-09-29发布 2018-04-01实施
中华人民共和国国家质量监督检验检疫总局
中国国家标准化管理委员会
发布
前 言
本标准按照GB/T 1.1—2009给出的规则起草。
本标准代替GB/T 5318—1985《烧结金属材料(不包括硬质合金)无切口冲击试样》。
本标准与GB/T 5318—1985相比,主要变化如下:
——增加了第3章规范性引用文件;
——更新了规范性引用文件的版本;
——做了编辑性修改。
本标准使用重新起草法修改采用ISO 5754:1978《烧结金属材料(不包括硬质合金)无切口冲击试样》。
本标准与ISO 5754:1978的技术性差异及其原因如下:
——关于规范性引用文件,本标准做了具有技术性差异的调整,以适应我国的技术条件。调整的情况集中反映在第3章“规范性引用文件”中,具体调整如下:
·删除了ISO 83;
·用修改采用国际标准的GB/T 229—2007代替了ISO 148-1。
本标准由中国有色金属工业协会提出。
本标准由全国有色金属标准化技术委员会(SAC/TC 243)归口。
本标准所代替标准的历次版本发布情况为:
——GB/T 5318—1985。
烧结金属材料(不包括硬质合金)
无切口冲击试样
1 范围
本标准规定了烧结金属材料(不包括硬质合金)无切口冲击试样的尺寸。试样可直接由压制烧结制成,也可由烧结制品经机械加工制成。
本标准适用于烧结金属材料(不包括硬质合金)冲击试验用无切口冲击试样。
2应用领域
本标准适用于除硬质合金以外的所有烧结金属和合金材料。但对于某些孔隙度低或延展性大的烧结材料,建议采用带切口的试样更合适,在这种情况下,试验得出的结果分散性小.(此种情况下,参见GB/T 229—2007)。
注:对于烧结金属多孔材料的冲击试验,其结果未必是很精确的,并且不建议与致密金属试验所得的结果相比较。
3规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 229—2007金属材料 夏比摆锤冲击试验方法(ISO 148-1:2006,MOD)
4试样尺寸
4.1试样尺寸见图1和表1。
图1试样尺寸图
表1 试样尺寸 单位为毫米
L A B
55±1 10±0.2 10±0.2
4.2为辨认压制方向,试样应标以记号,冲击试样在夏比冲击试验机上依据GB/T 229—2007进行试验。冲击方向应与压制方向垂直(除另有规定外)。