Hot Rolled Annealed Extrusion Hot Work Tool Steel Flat Bar SKD61
SKD61 steel flat bar is used for the manufacture large impact load
forging die, hot extrusion die, precision forging die; aluminum,
copper and alloy die-casting mold.
Delivery status: Brinell hardness HBW10 / 3000 (less than or equal
Quenching: 790 degrees ± 15 degrees preheating
1000 degrees (salt bath) or 1010 degrees (furnace control
atmosphere) ± 6 degrees heating
Insulation 5 ~ 15min air cooling
550 degrees ± 6 degrees tempering annealing, thermal processing
Chemical heat treatment
Mold can be further strengthened If use gas nitriding or
nitrocarburizing, but the nitriding temperature should not be
higher than the tempering temperature, in order to ensure that the
strength of the heart does not reduce, thus enhancing the service
life of the mold.
EF, or ESR, Hot rolled or forged, black surface or milling
Hardness: annealed to HB≤229
H13 is the introduction of the United States H13 empty hardening
hardened hot for die steel. Its performance, use and 4Cr5MoSiV
steel is basically the same, but because of its higher vanadium
content, so the temperature (600 degrees) is better than 4Cr5MoSiV
steel, hot work die steel is widely used in a representative steel.
1. Cu alloy extruded, die casting moulds.
2. Aluminum extruded moulds (such as Aluminum window frame,
3. Hot forging moulds (such as auto connecting rod, crank,
stainless dinner knife).
4. Lead Zn and Al alloy die casting moulds (such as engine
radiater, lights ang other decoration products).
5. Full hardness (52-54Hrc) plastiy moulds with igh polishing and
long lifetime requirements, (such as bakelite plastic mould).
The carbon content in the steel determines the hardness of the
quenched steel substrate.
According to the curve of the carbon content in the steel and the
hardness of the hardened steel, the quenching hardness of the H13
die steel is about 55 HRC.
For tool steels, a portion of the carbon in the steel enters the
matrix of the steel causing solid solution strengthening. The other
part of the carbon will combine with the carbide-forming elements
in the alloying elements into alloy carbides.
Hot work flat steel bar, in addition to a small amount of this
alloy carbide residue, but also requires it in the tempering
process quenched martensite matrix precipitated twice hardening
The properties of hot work tool steel are thus determined by the
organization of uniformly distributed residual alloying carbon
compounds and tempered martensite.
Thus, the content of C in steel can not be too low.