panzertank27 Posted July 18, 2009 Share Posted July 18, 2009 hi just a quick question, i have a large leaf spring knife to quench so i would like to add to my quench oil (it has seen only two small knives) do i have to add the same type of oil ie, 10 w 40 or can i mix in ie, 5 w 30 or even canola oil ??? i have some of each.please help as im now stuck.thank you Quote Link to comment Share on other sites More sharing options...
brucegodlesky Posted July 18, 2009 Share Posted July 18, 2009 go with the straight canola Quote Link to comment Share on other sites More sharing options...
Rich Hale Posted July 18, 2009 Share Posted July 18, 2009 When you stray the path and start experimenting it may give you false results. If it works you will not for sure know why if it fails you again will not know for sure why. The best way is to choose one quenchant that applies to the steel you are useing and stick with it for a few years. Keep notes of success and failures. eliminate guesswork. If x oil always has worked with a certain steel that is wot to use. Then if you change or mix and it fails you can record those results and go back to x. If you are new to heat treat and this mix fails how will you knoif it is temperature, time, oil, or bad steel. If non of what I said makes any sense at all mix away and I hope it works out great. Quote Link to comment Share on other sites More sharing options...
panzertank27 Posted July 19, 2009 Author Share Posted July 19, 2009 thanks for sayin what i knew to be true ,i just thought id ask in case i was assuming wrong, im just cheap so i was using donated oil , i will spring for canola. Quote Link to comment Share on other sites More sharing options...
clintonblacksmith Posted July 30, 2009 Share Posted July 30, 2009 i did some looking about this topic today.... everything i have found said to use one type of oil dont mix Quote Link to comment Share on other sites More sharing options...
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