標(biāo)準(zhǔn)編號:	GB/T 5766-1996
中文名稱:	摩擦材料洛氏硬度試驗(yàn)方法
英文名稱:	Test method of Rockwell Hardness for Friction Materials
行業(yè)分類:	GB    國家標(biāo)準(zhǔn)
發(fā)布機(jī)構(gòu):	中華人民共和國國家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局 中國國家標(biāo)準(zhǔn)化管理委員會(huì)
發(fā)布日期:	1996-3-27
實(shí)施日期:	1999-12-1
標(biāo)準(zhǔn)狀態(tài):	superseded
被新標(biāo)準(zhǔn)替代:	GB/T 5766-2007 摩擦材料洛氏硬度試驗(yàn)方法
被替代日期:	2008-6-1
替代舊標(biāo)準(zhǔn):	GB 5766-1986 摩擦材料洛氏硬度測定法
翻譯語言:	英文
文件格式:	PDF
中文字符數(shù):	4000 字
翻譯價(jià)格(元):	120.0
交付時(shí)間:	付款后 1 個(gè)工作日

1 Subject Content and Application Scope This standard specifies test methods of Rockwell hardness for friction materials. This standard is applicable to dry type friction material products; and not applicable to powder metallurgical friction material products. 2 Normative References GB 8170 Rules for Rounding Off of Numerical Values JJG 884 Verification Regulation of Plastic Rock Well Hardness Testing Machine 3 Terms and Definitions 3.1 Rockwell hardness Under the specified conditions, primary and main test forces are respectively applied with specified ball indenter on the surface of friction material products, and the main test force is unloaded, while keeping the primary test force. The residual increment e of pressed depth of the ball indenter under the action of primary test forces for two times is adopted, and it is expressed by 0.002mm. Rockwell hardness HR= 130-e 3.2 Scales The symbol combinations to indicate the Rockwell hardness of steel ball and the test force are detailed in Table 1.