Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
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
中華人民共和國國家標準
GB/T 5318—2017
代替GB/T 5318—1985
燒結金屬材料(不包括硬質合金)
無切口沖擊試樣
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發布 2018-04-01實施
中華人民共和國國家質量監督檢驗檢疫總局
中國國家標準化管理委員會
發布
前 言
本標準按照GB/T 1.1—2009給出的規則起草。
本標準代替GB/T 5318—1985《燒結金屬材料(不包括硬質合金)無切口沖擊試樣》。
本標準與GB/T 5318—1985相比，主要變化如下：
——增加了第3章規范性引用文件；
——更新了規范性引用文件的版本；
——做了編輯性修改。
本標準使用重新起草法修改采用ISO 5754：1978《燒結金屬材料(不包括硬質合金)無切口沖擊試樣》。
本標準與ISO 5754：1978的技術性差異及其原因如下：
——關于規范性引用文件，本標準做了具有技術性差異的調整，以適應我國的技術條件。調整的情況集中反映在第3章“規范性引用文件”中，具體調整如下：
·刪除了ISO 83；
·用修改采用國際標準的GB/T 229—2007代替了ISO 148-1。
本標準由中國有色金屬工業協會提出。
本標準由全國有色金屬標準化技術委員會(SAC/TC 243)歸口。
本標準所代替標準的歷次版本發布情況為：
——GB/T 5318—1985。
燒結金屬材料(不包括硬質合金)
無切口沖擊試樣
1 范圍
本標準規定了燒結金屬材料(不包括硬質合金)無切口沖擊試樣的尺寸。試樣可直接由壓制燒結制成，也可由燒結制品經機械加工制成。
本標準適用于燒結金屬材料(不包括硬質合金)沖擊試驗用無切口沖擊試樣。
2應用領域
本標準適用于除硬質合金以外的所有燒結金屬和合金材料。但對于某些孔隙度低或延展性大的燒結材料，建議采用帶切口的試樣更合適，在這種情況下，試驗得出的結果分散性小.(此種情況下，參見GB/T 229—2007)。
注：對于燒結金屬多孔材料的沖擊試驗，其結果未必是很精確的，并且不建議與致密金屬試驗所得的結果相比較。
3規范性引用文件
下列文件對于本文件的應用是必不可少的。凡是注日期的引用文件，僅注日期的版本適用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。
GB/T 229—2007金屬材料 夏比擺錘沖擊試驗方法(ISO 148-1：2006，MOD)
4試樣尺寸
4.1試樣尺寸見圖1和表1。
圖1試樣尺寸圖
表1 試樣尺寸 單位為毫米
L A B
55±1 10±0.2 10±0.2
4.2為辨認壓制方向，試樣應標以記號，沖擊試樣在夏比沖擊試驗機上依據GB/T 229—2007進行試驗。沖擊方向應與壓制方向垂直(除另有規定外)。
