標(biāo)準(zhǔn)號(hào)：BS 7900-1998
中文標(biāo)準(zhǔn)名稱：精加工鋼鑄件表面結(jié)構(gòu)檢驗(yàn)規(guī)范
英文標(biāo)準(zhǔn)名稱：Specification for examination of the surface texture of precision steel castings
標(biāo)準(zhǔn)類型：J31
發(fā)布日期：1998/5/15 12:00:00
實(shí)施日期：1998/5/15 12:00:00
中國(guó)標(biāo)準(zhǔn)分類號(hào)：J31
國(guó)際標(biāo)準(zhǔn)分類號(hào)：77.140.80
適用范圍：This British Standard specifies levels of surface roughness/texture on steel castings produced by the resin shell, lost wax, lost polystyrene and Shaw moulding processes (see 2.5 to 2.8 for a brief description of each process). Surfaces created by subsequent fettling operations (see 2.4) are also included. In addition to the definitive requirements, this standard also requires the items detailed in clause 4 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied. NOTE. Acceptance levels should be agreed between the casting producer and purchaser by reference to a set of reference tactile comparators which represent the surfaces produced by the four moulding processes after blasting, and also, surfaces created by subsequent fettling operations. Annex A contains full size photographs of the comparator plates to assist in making a rapid review of the overall content of the set. It is emphasized, however, that the comparators and not the photographs should be used to form the basis of agreement