BS EN ISO 4884:2019 pdf download.Hardmetals - Sampling and testing of powders using sintered test pieces.
3 Terms and definitions
For the purposes or this document, the terms and definitions given in ISO 3954 apply and the following.
ISO and lEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https;JJwww.iso,orgJobp
— IEC Electropedia: available at hnpi/Lwwwslect roptd
4 Sampling
4.1 Sampling from a lot shall be carried out in accordance with ISO 3954.
4.2 In the event that a batch is blended into one lot in one blender as the last operation before separation into containers, then by agreement between producer and consumer, one or more test samples may be taken from the blender.
S Preparation of test pieces
5.1 The test pieces shall be processed from the test sample in conformity with their grade and dimensions. All the test pieces for each type of testing shall be sintered simultaneously under the same conditions and in the same furnace.
5.2 To ensure that the characteristics of the test pieces prepared from the lot of powder are significant. the appropriate manufacturing conditions shall be used in the production of the test pieces.
5.3 The dimensions of the test pieces shall comply with the requirements of the relevant International Standards specified in Table 1. For the determination of pomsity one or more test pieces shall be sectioned to enable a total area of not less than 1 cm2 to be examined.
6 Testing
Tests on sintered test pieces from a lot of powder shall be carried out in accordance with the International Standards given in Table 1.
For the purposes or this document, the terms and definitions given in ISO 3954 apply and the following.
ISO and lEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https;JJwww.iso,orgJobp
— IEC Electropedia: available at hnpi/Lwwwslect roptd
4 Sampling
4.1 Sampling from a lot shall be carried out in accordance with ISO 3954.
4.2 In the event that a batch is blended into one lot in one blender as the last operation before separation into containers, then by agreement between producer and consumer, one or more test samples may be taken from the blender.
S Preparation of test pieces
5.1 The test pieces shall be processed from the test sample in conformity with their grade and dimensions. All the test pieces for each type of testing shall be sintered simultaneously under the same conditions and in the same furnace.
5.2 To ensure that the characteristics of the test pieces prepared from the lot of powder are significant. the appropriate manufacturing conditions shall be used in the production of the test pieces.
5.3 The dimensions of the test pieces shall comply with the requirements of the relevant International Standards specified in Table 1. For the determination of pomsity one or more test pieces shall be sectioned to enable a total area of not less than 1 cm2 to be examined.
6 Testing
Tests on sintered test pieces from a lot of powder shall be carried out in accordance with the International Standards given in Table 1.
