×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Effect of initial oil temperature on impact toughness of steel
2

Effect of initial oil temperature on impact toughness of steel

Effect of initial oil temperature on impact toughness of steel

(OP)
Can any one can give me some informations about the effect of the oil initial temperature on impact toughness of steel :

IE: what happen if we quench at various temperatures: 20°C, 30 °C 40°C what is the effect on the impact toughness ?

thanks

 

RE: Effect of initial oil temperature on impact toughness of steel

2
It can be difficult to draw an exact correlation to quench oil temperature, but in general, for the best impact results, you want to have the most effective quench.  You should consult your quench oil supplier to find the optimum temperature for the oil you are using.

With that said, most petroleum oils will be most effective around 50 to 60 C (120-140 F).  At lower temperatures, the viscosity goes up, reducing the flow characteristics and the severity of the quench.  At higher temperatures, you run into problems with the oil breaking down and even problems with fire if the oil should exceed the burn point of the oil.  Again, the supplier of the quench oil will know what the optimum temperatures are, although the volume of your quench tank, size of the quenching load, and effectiveness of the heat exchanger will all be important variables.

With water or water-based synthetic quench solutions, the optimum temperature is much lower.  Again, there are really too many factors to just say any specific temperature.

Finally, you may find differences in the chemistry of different lots of steel to have a greater effect than the quenchant temperature.  There are many different variables, and quench oil temperature is only one

rp

RE: Effect of initial oil temperature on impact toughness of steel

(OP)
Great informations !

Thanks a lot Redpicker !


 

RE: Effect of initial oil temperature on impact toughness of steel

You always need to check the material data sheets as some materials actually require the quench media to be above RT by varying degrees.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources