red hardness
Definition
- Noun (technical, metallurgy):
- Red hardness refers to the property of a material, typically a metal or alloy, to retain its hardness and resistance to deformation even when heated to a red-hot temperature (approximately 500–600°C or higher). This characteristic is crucial for tools used in high-speed machining or cutting operations, where friction generates extreme heat.
Usage Examples
- (The material stays hard despite intense heat.)
- (The blade maintains its strength at elevated temperatures.)
Advanced Usage
"to exhibit red hardness": to show the ability to remain hard at high temperatures.
- Tungsten carbide tools exhibit superior red hardness compared to standard carbon steel. (They remain hard when heated to red heat.)
"red hardness test": a laboratory procedure to measure a material's hardness at high temperatures.
- The engineer conducted a red hardness test to verify the tool's suitability for high-speed applications. (The test assessed performance under heat.)
Variants and Related Words
Red-hard (adj): describing a material that possesses red hardness.
- The red-hard steel maintained its cutting capacity even under extreme friction. (The steel was heat-resistant.)
Hardness (n): the quality of being hard, especially in terms of resistance to indentation or scratching.
- Hardness is a key factor in selecting materials for industrial tools. (It measures durability.)
Synonyms
- Hot hardness: the ability to remain hard at elevated temperatures (a broader term often used interchangeably).
- Heat resistance: the capacity to withstand high temperatures without degradation (though less specific to hardness).
Phrasal Verbs
- (No common phrasal verbs are directly associated with "red hardness," as it is a technical noun.)
Related Idioms
- (No idioms are commonly used with "red hardness," as it is a specialized technical term.)