| NOUN | substance | quenched steel | steel that has been hardened by immersing it in water or oil to cool it |
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| Meaning | steel that has been hardened by immersing it in water or oil to cool it. | |
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| Narrower | oil-hardened steel | steel that is quenched in oil |
| Broader | steel | An alloy of iron with small amounts of carbon |
| Substances | martensite | A solid solution of carbon in alpha-iron that is formed when steel is cooled so rapidly that the change from austenite to pearlite is suppressed |
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