钴、铜、钨和铁粉用氢质量损失(氢还原减重)的标准试验方法

详细信息   

• 标准号：ASTM E159-2010
• 发布日期：2010
• 英文题名：Standard Test Method for Loss of Mass in Hydrogen for Cobalt, Copper, Tungsten, and Iron Powders (Hydrogen Loss)
• 英文主题词：chemical analysis ; cobalt powder ; copper powder ; hydrogen loss ; iron powder ; metal powders ; oxygen content ; tungsten powder ; Chemical analysis ; Copper powder ; Hydrogen content--metals/alloys ; Hydrogen loss ; Iron powder ; Metal powders ; Oxides (hydrogen reducible) ; Tungsten powder
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：77.160
• 载体形态：3P.;A4
• 中国标准分类号：H16
• 国别：美国材料与试验协会

文摘

The oxygen content of a powder affects both its green and sintered properties.

Hydrogen loss is a term widely used in the powder metallurgy industry even though the measurement represents an approximate oxygen content of the powder.

Oxygen is the most common hydrogen-reducible constituent of metal powders, and this procedure may be used as a measure of oxygen, reducible under the test conditions, if other interfering elements are absent.

1.1 This test method covers the determination of the mass of hydrogen-reducible constituents in the following metal powders: cobalt, copper, iron, and tungsten.

1.2 This test method is useful for cobalt, copper, and iron powders in the range from 0.05 to 3.0 % oxygen, and for tungsten powder in the range from 0.01 to 0.50 % oxygen.

1.3 This test method does not measure the oxygen contained in oxides such as silicon oxide (SiO₂), aluminum oxide (Al₂O₃), magnesium oxide (MgO), calcium oxide (CaO), titanium dioxide (TiO₂), etc. that are not reduced by hydrogen at the test temperatures.

1.4 For total oxygen content, vacuum or inert gas fusion methods are available (see Test Methods E1019).

1.5 The values stated in SI units are to be regarded as the standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.