High-speed steel is also___________________(know) as self-hardening steel.
举一反三
- Steel structure involves sub-structure or members in a building made______ structural steel.
- Boron is added to structural steel to increase its ( ). A: tempering stability B: toughness C: hardenability D: hardening capacity
- If the carbon content of a type of steel is 0.1%， this steel is a kind of （ ）. A: low-carbon steel B: medium-carbon steel C: high-carbon steel D: HTLA steel
- If the carbon content of a type of steel is 0.1%, this steel is a kind of (). A: low-carbon steel B: medium-carbon steel C: high-carbon steel D: HTLA steel E: 2-1-1 F: 章测
- The problems that ferritic steel produces during welding are ( ) and ( ). A: Grain refinement B: Intergranular corrosion C: Toughness increase D: Hardening tendency