Heat Treating of 17.4PH Stainless 6 - Eng-Tips
2003年1月10日 · The Heat Treater's Guide states that the most commonly used heat treating practice is (1) Solution heat treat at 1875 to 1925F, oil quench to room temperature; (2) Age at 900F for 1 hour and air cool. This is known as condition H900. A hardness of approximately 42 to 44 HRC should result.
heat treating 4130 steel - Metal and Metallurgy engineering - Eng …
2005年2月23日 · I tried to heat treat a piece of 4103 steel .125 thick 6 inches long shaped like a "u". I put the piece in the furnace at 1600 degrees for 2 hours (the oven was preheated), then oil quenched, and anealed at 700 degrees for 1 1/2 hours. The rockwell hardness I achevied was only 22 on the c...
Heat Treating Issues with 4140 (Scaling) - Metal and Metallurgy ...
2010年6月9日 · The furnace is gas powered, it's a brick oven, the heat is blown in through the base and distributed upwards and out the stack. We only heat treat the same material in each batch so we don't mix the 4340 with the 4140. The parts are machined to size prior to heat treating with CNC milling machines which use dry cutting inserts.
Procedure for Heat Treating SAE 4140 - Metal and Metallurgy
2003年8月27日 · The as-quenched hardness depends on the section size. For a 0.5 inch diameter bar oil quenched from 1550 F, the surface hardness will be ~ 57 HRC, and the center will be ~ 55 HRC.
Heat treating A36 steel - Metal and Metallurgy engineering
2005年5月21日 · This could be done on site or you could set it up to rotate it while still in the shop. These flame hardening heads are basically glorified torches that put out a tremendous amount of heat in a controlled pattern. Any steel with a carbon content around .50 or higher would work, but will require precautions for welding, namely pre-heat.
Proper callouts for heat treating 4340 - Metal and Metallurgy ...
2007年11月8日 · MIL-H-6875H has a gap between the 200-220 KSI and the 260-280 ksi heat treatments. I am no metallurgist but I believe it is connected to some heat treatment embrittllment in the in the range of 220ksi and 260ksi.
Heat treating CA6NM - Metal and Metallurgy engineering - Eng-Tips
2005年6月10日 · The % carbon coupled with the above heat treatment will typically develop a hardness in the range of 228 - 248 BHN @ 3000kgf - 15 sec. Measure the hardness in BHN.Conversion from BHN to Rc is not recommended since there is very little known about the relation netween BHN to Rc with respect to CA6NM.
Heat treating AISI 1144 for best wear resistance. - Metal and ...
2004年12月20日 · If the part isn't very intricate and as you say strength and toughness are no problem you can use a water quench to get a reasonable hardness without the material being like glass. The following heat treatment will get you by for short time. Normalize @ 1650°F air cool Reheat to 1550°F water quench Temper at 800°F Hardness Rc 39-40
Cracking problems in Heat treating 4340 - Metal and Metallurgy ...
2002年12月4日 · For initial heat treating to obtain 148 KSI Y.S in the center of the 12" diameter bar, what were austenitizing temperature, quench media and tempering temperature. What was the "flame hardening" process methods and quench media and its application methods.
4140T...is it necessary to make it a heat treating? - Metal and ...
2008年10月14日 · The last item broke it by torsion action, I´m thinking to make this new item on 4140T but I do not know if it is necessary to make a heat treating to this item. I pretend to use 4140T in order that this item will not fail and also I´m using 4140T in order to not to make it …