die steel and high-speed steel material heat treatment

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Several different types of die steel and high-speed steel material introduction and heat treatment knowledge

1.3343 High-speed steel characteristics introduction

Gritz 1.3343 high-speed steel is tungsten-molybdenum series general high-speed steel. 1.3343 high-speed steel has the advantages of fine and uniform carbides, high toughness and good thermoplasticity. It is a high-alloy steel tool steel containing a variety of alloying elements, belonging to the ledeburite type steel. It has high hardness, high wear resistance, high thermal hardness, high hardenability and sufficient plasticity and toughness, and has good casting, forging, welding and machining properties, so it occupies an important position in tool steel.

The comprehensive performance of tungsten-molybdenum high-speed steel is similar to that of tungsten, but the carbide grains are smaller and the distribution is more uniform, so the strength and toughness are better than tungsten high-speed steel. It can be used to manufacture tools with large cross-sectional dimensions, especially in hot conditions. The bottom plasticity is good, suitable for manufacturing hot-rolled tools (such as hot-rolled drills). Dongqi die steel imported German Gritz 1.3343 high-speed steel has a large tendency to decarburize during heat treatment, is easy to oxidize, and has a narrow fire temperature range. Tungsten-molybdenum high-speed steel uses molybdenum Mo to replace part of tungsten W. Molybdenum Mo has a similar effect to W in the alloy, but its relative atomic mass is 50% smaller than tungsten W. Therefore, the density of 1.3343 tungsten-molybdenum high-speed steel is less than that of tungsten High speed steel.

1.3343 high-speed steel chemical composition

Element	C	Si	Mn	Cr	Mo	W	S	P	V
Content	0.9	0.3	0.3	4.1	5.0	6.4	0.03	0.03	1.9

1.3343 High Speed Steel Purpose
Gritz 1.3343 high-speed steel is mainly used to make tools with large loads, complex shapes, and precious tools (such as scrapers, gears, milling cutters, drill bits, tapping cutters, etc.), cold forging dies, forging tools, cutting machines, head forming dies, Cold heading dies, extrusion tools, general toughness, precision and wear-resistant hardware cold punching dies, punches and dies, various drill bits, tools that can withstand vibration and impact loads, drawing tools, metal cutting saw blades, etc.

1.3343 high-speed steel processing
Quenching: oil; tempering temperature 540~560 degrees Celsius; box furnace 63HRC, salt bath furnace 64HRC.

Delivery status: hot-rolled, forged, and cold-drawn steel bars are delivered in annealed state; hot-rolled, forged steel bars are delivered after annealing or other processing methods (such as peeling, light drawing, polishing or polishing, etc.)

1.2379 is a high-carbon and high-chromium alloy tool steel, which has high hardness and wear resistance after heat treatment, and has the characteristics of strong hardenability and good dimensional stability.

Vacuum degassing refining processes the purity of steel.

Spheroidizing annealing softening treatment, good cutting performance.
The strengthening element vanadium and molybdenum are specially added, and the wear resistance is extremely excellent
Chinese GB standard grade Cr12Mo1V1, American AISI/ASTM standard grade D2, Japanese JIS standard grade SKD11, German DIN standard grade X155CrVMo121, Japanese Hitachi (HITACHI) standard grade SLD, Japanese Datong (DAIDO) standard grade DC11, Japan Fujitsu (NACHI) standard Grade CDS11, Austria BOHLER standard grade K110, Sweden ASSAB (ASSAB) standard grade XW41.

Hardened and tempered to a hardness of 63HRC. Its physical properties at room temperature and high temperature
1) At a temperature of 20°C, the density is 7700g/cm, the thermal conductivity is 20.0W/(m-K), and the modulus of elasticity is 210000MPa.
2) At a temperature of 200°C, the density is 7650g/cm, the linear expansion coefficient (20°C) is 12.2×10K, the thermal conductivity is 21.0W/(m-K), and the elastic modulus is 200000MPa.
3) At a temperature of 400℃, density is 7600g/cm, thermal conductivity is 23.0W/(m-K), elastic modulus is 180000MPa.

Application industry
1) Suitable for high-speed punching of various silicon steel sheets.
2) Suitable for precision stamping dies, cold extrusion forming dies, drawing dies, and punching dies.
3) Scissors, deep drawing dies and pipe drawing dies for cutting thin materials with high efficiency.
4) Suitable for various cold stamping dies with complex and easily deformable tool dies, high wear resistance and long service life.
5) Used as a cold work die that requires excellent wear resistance and good toughness, and can be used for embossing die and cold forging die.
6) For heavy-duty stamping dies, cold cutting blades, thread rolling boards, etc.
7) Used for cold heading molds, clay molds, etc.
8) Used for damaging plastic molding molds.

1.2367 hot work die steel X38CrMoV5-3/1.2367 hot work die steel
Chemical composition: C 0.4CR 5.0 MO 3.0 V 0.5 The main application customers are: automotive manufacturing, Peugeot, Mercedes-Benz dao, BMW, GM, Ford, Volkswagen and other famous automotive companies mold material suppliers
The main properties and applications of X38CrMoV5-3 steel:
High toughness and excellent high temperature resistance; excellent heat fatigue and wear resistance at high temperatures; very suitable for high-quality products;
Heat treatment deformation is small; compared with traditional smelting steel, it has better isotropy and excellent toughness and plasticity in all directions.
The main application and production of X38CrMoV5-3 steel:
Adaptation: light alloy pressure forming; steel forging forming die; extrusion die; heavy alloy square iron and guide bushing;
Pressure forming mold; die casting mold (upper mold, lower mold, insert, thimble, sleeve cold blanking, hot shearing and wear-resistant parts.
Extrusion molds (concave molds, mold pads, extrusion cylinders, punches); aluminum, copper, and magnesium hot press forming molds; plastic molds;

1.2344 is pressure-resistant hot working die steel. The steel is electroslag remelted, with uniform material, good hardenability, excellent machining performance and polishing performance, high toughness and plasticity, good high and low temperature wear resistance, high temperature fatigue resistance and heat resistance.
Forging Softening Annealing Hardening Tempering
1050-850℃ 820-840℃ 1020-1050℃ 520-700℃
Purity: According to ASTM E45 method A, A sulfide≤0.5, B oxide, C silicate and D spherical oxide each≤1 or DIN 50602-K1≤10 or according to customer requirements.
Delivery state of steel: soft annealed, good microstructure, hardness up to 229HB or quenched and tempered to customer requirements.
Specification for isothermal annealing
Annealing temperature (850±10)°C, holding for 2h, cooling with furnace to (720±10)°C, holding for 4h, furnace cooling to below 500°C, out-of-furnace air cooling, hardness ≤229HBW.
High temperature tempering specification
Tempering temperature (730 ±10)°C, heat preservation 2h, furnace cooling ≤500°C, air cooling after furnace.
Quenching and tempering specifications
Quenching temperature 850 ~880°C, oil cooling, hardness 50 ~52HRC; tempering temperature 580 ~640°C, air cooling, hardness 28 ~36HRC
Pre-hardening treatment specification
Heating temperature 860 ~900°C, oil cooling, tempering temperature 570 ~70O°C, air cooling, tempering hardness 28~35HRC.

The high-pressure gas quenching vacuum furnace and the double-chamber oil quenching vacuum furnace produced by SIMUWU can perform heat treatment and quenching for the above materials of high-speed steel/die steel. The effect after heat treatment meets international standards.

To choose a vacuum heat treatment furnace, please visit the website of Shanghai Gehang Vacuum Technology Co., Ltd.: www.vacfurnace.com

Learn More : Vacuum Heat Treatment Furnace