Application of vacuum oil quenching furnace on 1.2379 steel

2026-01-27 11:13

1. Properties and Applications of 1.2379 Tool Steel

1.2379 is a high-carbon, high-chromium cold-work tool steel that is widely used in industry. It possesses extremely high wear resistance, excellent dimensional stability, high hardness, good toughness, and moderate corrosion resistance. This metal is primarily used in the manufacture of cold-working tools that require resistance to significant wear and have complex shapes, such as: metal stamping dies, cutting tools, knives/hand tools, and forming tools.

Cold-work tool steel stud bolts after vacuum oil quenching, showing wear-resistant fasteners used for high-load tooling applications

1.2379 steel hex bolts after vacuum oil quenching treatment, demonstrating improved dimensional stability and surface hardness

2. 1.2379 Steel Oil Quenching Process

To obtain high-strength metal like 1.2379, vacuum oil quenching is an essential step. The following is the specific process for vacuum oil quenching of 1.2379:

1. First stage preheating: Preheat and hold at a temperature of 600-650℃ for 45-60 minutes.
2. Second stage preheating: After heating, hold at a temperature of 800-850℃ for 45-60 minutes.
3. Heating and austenitizing: Heat and hold at a temperature of 1020-1040℃ for 20-45 minutes.
4. Quenching and cooling: Oil temperature: 40-80℃, oil exit temperature: 150-200℃.
5. Multiple tempering treatments are required to relieve stress and stabilize the microstructure.

3. Technical Parameters of SIMUWU Dual-Chamber Furnace

In 1.2379 steel vacuum oil quenching process, SIMUWU’s vacuum oil quenching furnace can complete the entire process flawlessly through automatic program control. The following are the technical parameters required for the vacuum oil quenching furnace:

Furnace type	Horizontal, dual chamber, double door
Loading method	Front loading
Uniformity size	900×600×600(L×W×H mm)
Max loading weight	600kg(including jig)
Power supply	3 phase, 380v(±5%),50Hz
Heating power	180kw
Motor power	18.5kw
Max design temperature	1320℃
Working temperature	500-1050℃
Temperature uniformity	9 points temperature measurement（±5℃）
Temperature control accuracy	S type thermocouple ±1℃(Standard AMS2750E)
Quantity of heating zone	1 zone independently temperature control
Heating element	High purity graphite
Time of workpiece transform（s）	25(From heating chamber to cooling chamber)
Time to working temperature	≤60min
Empty furnace temperature rising rate	0~25℃ /min(speed adjustable)
Ultimate vacuum	4×10-1pa(cold empty furnace, after fully drying)
Working vacuum	5.0 x 100pa
Time to working vacuum	≤40min(empty furnace and cold condition)
Pressure rising rate	≤0.67Pa/h(empty furnace and cold condition）
Cooling method	Air cooling/ natural cooling
Cooling gas	Nitrogen or Argon(purity: 99.99% or 99.999%)
Cooling rate(empty furnace 1200℃~150℃)	≤45mins
Quenching gas charging pressure	< 2 bar (absolute pressure)
Cooling water consumption	≤ 20 cubic meter/hour
Partial pressure	50-1000 Pa manual and automatic pressure control
Operate method	manual or automatic control
Equipment color	customized