Abstract
1. Raising the temperature of the quenching bath from 400–550°C to 600–675°C with brief holding (up to 30 min) of high-speed steel R18 causes no changes in the structure or physical, mechanical, or cutting properties. 2. Raising the temperature of the quenching bath above 675°C is inadvisable, since prolonged holding may lower the red hardness, strength, and cutting properties. 3. Quenching at 600–675°C with holding for no more than 30 min and cooling in air can be recommended for wide use in heat treating various tools of high-speed steel. It prevents cracks, substantially reduces deformation (warping, changes in dimensions, etc.), and eliminates the possibility of corrosion. 4. It is recommended that high-speed steel be quenched in a bath of BNK-1 salt, containing 50% BaCl2+25% NaCl+25% KCl, with a melting temperature of 590°C and operating temperature of 610–900°C.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
