Steel shaft material which is capable of being directly cut and

Details Steel shaft material which is capable of being directly cut and Steel shaft material which is capable of being directly cut and

1992-06-03

1994-01-18

Yee, Deborah

Metal treatment

Stock

Ferrous

148335, 148654, 420121, C22C 3814

Patent

active

052796884

ABSTRACT:
A steel shaft material having desirable cuttability and induction hardenability even in the form of milled stock without being subjected to any heat treatment, such as annealing, and a method for manufacturing the same. A steel ingot is prepared containing 0.38 to 0.45 wt. % of carbon, 0.15 wt % or less of silicon, 0.3 to 1.0 wt % of manganese, 0.0005 to 0.0030 wt % of boron, 0.01 to 0.05 wt % of titanium, 0.01 to 0.06 wt % of aluminum, 0.010 wt % or less of nitrogen, optionally at least one of chromium in an amount of 0.3 wt % or less and molybdenum in an amount of 0.10 wt % or less, and optionally at least one of 0.005 to 0.30 wt % of sulfur, 0.0002 to 0.005 wt % of calcium, 0.005 to 0.30 wt % of lead and 0.005 to 0.10 wt % of tellurium, and the remainder being iron and unavoidable impurities. After the ingot is heated to 1,100.degree. C. or less, the ingot is milled at a finishing temperature of 950.degree. C. or below and an area reduction rate of 70% or higher, and then cooled in the atmosphere. The steel material of the present invention has a microstructure formed of ferrite and lamellar pearlite (the amount which remains bainite being %5 or less) and having a ferrite grain size number of 6 or higher, as determined by JISG0552, a HRB hardness of 80 to 90, as determined by JISZ2245, and a DM-T decarbonized depth of 0.20 mm or less, as determined by JISG0558.

REFERENCES:
patent: 4406711 (1983-09-01), Nagumo et al.
patent: 4898629 (1990-02-01), Lang et al.

Affiliated with

Also associated with

Rating

Steel shaft material which is capable of being directly cut and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Steel shaft material which is capable of being directly cut and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steel shaft material which is capable of being directly cut and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1133963