- Product Description
-
FT416ESR is a high-performance hot-work die steel produced by the electroslag remelting (ESR) process, usually by the Swedish company Assab. It is an upgraded product based on the classical H13 steel by improving the smelting purity and optimizing the chemical composition. It is famous for its excellent high temperature strength, thermal fatigue resistance and toughness, mainly used in aluminum, magnesium, copper and other alloy die-casting mold.
I. Core features
Designed to withstand extreme thermal cycling and mechanical stress, the FT416ESR's core advantages include:Excellent high temperature strength and hardness (tempering softening resistance)
The FT416ESR can still maintain high hardness and strength under long-term high temperature environment (up to 600 °C) , and resist the deformation and collapse of the mold, so as to ensure the dimensional accuracy of the casting.
Excellent resistance to thermal fatigue
This is one of the most critical properties of hot work die steels. During the die casting process, the mold will experience repeated cycles of heating (molten metal injection) and cooling (open mold spraying) , which is very easy to produce cracks (thermal fatigue cracks) . FT416ESR has excellent thermal shock resistance and thermal fatigue resistance, which can significantly delay the generation of cracks and prolong the life of the die.
High toughness and ductility
Good toughness can prevent brittle fracture or corner cracking of the die under severe working conditions (such as inadequate preheating, rapid cooling and heating, mechanical impact) , and improve the safety and reliability of the die.
Good thermal conductivity
A relatively high thermal conductivity contributes to the rapid heat dissipation of the mold cavity, reduces the peak temperature of the mold surface, slows down the accumulation of thermal stress, and has a positive contribution to the improvement of thermal fatigue resistance.
Excellent hardenability
Even in the large size section, can also achieve uniform mechanical properties and hardness distribution, to ensure that the overall performance of large mold consistent.
Main chemical constituents (typical values)
The chemical composition of FT416ESR is based on H13 but has been optimized with the following typical values:Elements carbon (c) chromium (CR) molybdenum (MO) vanadium (V) silicon
0.39% ~ 5.20% ~ 1.40% ~ 0.90% ~ 1.00%
Electroslag remelting (ESR) process: this is the key to its superior performance. The ESR process greatly improves the cleanliness of steel, reduces the number and size of harmful inclusions, and thus significantly improves the toughness, fatigue resistance and polishing performance of steel.Typical areas of application
FT416ESR is designed for the following demanding thermal applications:Die casting dies for aluminum and magnesium alloys: key applications. Such as automobile engine block, gearbox shell, wheel hub, electronic products such as die-casting mold shell.
Copper alloy die-casting die: due to the higher melting point of copper alloy, the thermal strength and thermal fatigue resistance of die steel are very demanding, FT416ESR is one of the common choices.
Heavy forging and extrusion dies: dies used in forging and extrusion processes that are subjected to extremely high pressures and temperatures.
Die parts: such as mandrel, Punch, slider and other key components.
Heat treatment process
Softening annealing: in protective atmosphere, heating to about 850 °C, and then slow cooling, hardness can reach about 220HB.Quenching (hardening) :
Preheating: preheating in two stages (e. g. 600-650 °C and 850-900 °C) to reduce thermal stress and deformation.
Austenitizing: recommended temperature is 1020-1050 °C. Higher austenitizing temperature can make the alloy carbide fully dissolved, and obtain higher hot hardness and wear resistance, but it will slightly sacrifice toughness.
Cooling: oil cooling or high pressure gas quenching can be used. High-pressure gas quenching can better control the deformation of complex-shaped die.
Tempering:
At least two temperings must be performed to ensure adequate transformation of retained austenite and to obtain stable properties.
The tempering temperature is usually between 550 °C and 600 °C, depending on the desired final hardness.
Typical hardness: 44-48 HRC. In this hardness range, it can achieve the best balance of toughness, thermal strength and thermal fatigue resistance.
Conclusion
FT416ESR represents a benchmark for high quality H13 hot work die steels. Through electroslag remelting (ESR) process, the cleanliness, toughness and thermal fatigue resistance of H13 steel are significantly improved on the basis of inheriting its good comprehensive properties. For the manufacture of large, complex, long life die casting mold, especially in the pursuit of high production efficiency and high reliability of automotive, aerospace and other fields, the choice of FT416ESR is an effective investment in ensuring die performance, reducing downtime, and reducing the cost per piece.
Product inquiry
Have a question about purchasing a product or solution that you are interested in? Fill in the form and we’ll respond in 7 working days.
Latest Products
1013 Min'an Avenue, Xiang'an District Xiamen City, Fujian Province, China
+86-13225990951
2605949828@qq.com
