TH67926B - Steel plates for soft nitriding and manufacturing methods - Google Patents

Abstract

------ 03/08/2018 ------ (OCR) Page 1 of 1, Page 1 of the Invention. Steel plates for soft nitriding processes with machinability and fatigue properties. The good ones make it a steel plate for soft nitriding processes with a composition of C 0.05% or more and not more than 0.10%, Si: not more than 0.5%, Mn: 0.7% or more and not more than 1.5%. , P: not more than 0.05%, R: not more than 0.01%, AI: 0.01% or more and not more than 0.06%, Cr: 0.5% or more and not more than 1.5%, V: 0.03% or more and not more than 0.30%. , N: not more than 0.005% by% by mass and the proportion of solid solution volume V to such content V (solid solution V / V content) is greater than 0.50, the remainder is Fe with inevitable foreign matter. have And has a mixed structure with optional FORT with perlite. ------------ Steel plates for soft nitriding, which are capable of Formed with good fatigue properties, it is a steel plate for soft nitriding processes with composition C: 0.05% or more and not more than 0.10%, Si: not more than 0.5%, Mn: 0.7% more. Go and not more 1.5%, P: not more than 0.05%, S: not more than 0.01%, Al: 0.01% or more and not more than 0.06%, Cr: 0.5% or more and not more 1.5%, V: 0.03% or more and not more than 0.30%, N: not more than 0.005% by% by mass and the proportion of volume V dissolved and solidified to that of V (melted and solidified V / volume of V ) Greater than 0.50, the remainder is Fe with the inevitable foreign matter And has a mixed structure containing ferrite with selective perlite;

Claims (1)

Disclaimer (all) which will not appear on the advertisement page. : ------ 03/08/2018 ------ (OCR) Page 1 of 2 pages, terms of 1.03% or more and not more than 0.30% N: Not more than 0.005% by% by mass. And the proportion of the solid solution V to the amount of V (dissolved solid V / volume of V) is greater than 0.50. Avoidable And having mixed structures containing ferrite and perlite 1.005% or more and not more than 0.025% by%, with mass added to the aforementioned composition 1.03% and not more than 0.30% N: not more than 0.005% according to % By mass, the remainder is Fe with the inevitable foreign matter. Make the temperature increase the heat Of such hot rolling to 1100 ° C or more and not more than 1300 ° C, making the temperature The final above is the Ar3 transition point up and not over (Ar3 transition point + 100 ° C) makes the average cooling speed of such cooling 30 ° C / s or more and thus the winding temperature. The storage of such spool is 500 ° C or more and not more than 600 ° C, page 2 of 2 pages 1.005% or more and not more than 0.025% by% by mass added to the aforementioned composition. ------ 1.Steel plates for soft nitriding which have specific characteristics that are composed of C: 0.05% or more and not more than 0.10% Si: not more than 0.5% Mn: 0.7% or more and not more than 1.5% P. : Not more than 0.05% S: not more than 0.01% Al: 0.01% or more and not more than 0.06% Cr: 0.5% or more and not more than 1.5% V: 0.03% or more and not more than 0.30% N: not more than 0.005% According to% by mass and the proportion of volume V, dissolved and solidified to the aforementioned amount of V (dissolved and solidified V / V content) is greater than 0.50, the remainder is Fe with inevitable foreign matter and has a mixed structure at Contains ferrites with perlite