Hardness testing with files consists essentially of cutting or abrading the surface of metal parts, and approximating the hardness by the feel, or extent to which, the file bites into the surface.

2022年12月11日 · ll not cut the surface of the material being tested. 1.1 Application— This SAE Recommended Practice describes the technique of using a file for testing the surface …

2022年10月2日 · SAE J 864 用锉刀做表面硬度测试 前言--此文件的重申被更改只是反应新的 SAE 技术标准委员会格式。 1.范围--锉刀做的硬度测试基本上包括金属件表面的切削和研磨，且接近触摸的硬度，或扩 展到锉刀咬进表面。

Application—This SAE Recommended Practice describes the technique of using a file for testing the surface hardness of miscellaneous iron and steel parts as designated by engineering specifications. In presenting this procedure, it is recognized that it is subjective and that it must be used with considerable judgment on the part of the operator.

Hardness testing with files consists essentially of cutting or abrading the surface of metal parts, and approximating the hardness by the feel, or extent to which, the file bites into the surface.

Hardness testing with files consists essentially of cutting or abrading the surface of metal parts, and approximating the hardness by the feel, or extent to which, the file bites into the surface.

2018年1月10日 · Hardness testing with files consists essentially of cutting or abrading the surface of metal parts, and approximating the hardness by the feel, or extent to which, the file bites into the surface.

2025年3月12日 · SAE J864-2018的标准全文信息,“用锉刀进行硬度测试主要包括切割或打磨金属零件的表面@，并通过锉刀咬入表面的感觉@或程度@来估算硬度。 术语“锉硬”是指表面硬度测试的零件的硬度经过验证的新锉刀不会切割正在测试的材料的表面。 ”

This SAE Standard covers material, dimensional, performance and test requirements for metric thread rolling screws suitable for use in general engineering applications.

SAE J864_201801-2018《文件表面硬度测试（稳定版:2018年1月）》 用锉刀进行硬度测试基本上包括切割或研磨金属部件的表面，并通过锉刀咬入表面的手感或程度来近似硬度。