40cr gear processing

40cr gear processingIt is forged from 40Cr steel and has been heated, forged, heat treated, and finished. 40cr steel is the standard steel grade of my country's GB. It is medium carbon quenched and tempered steel, cold heading die steel, moderate price, easy to process, after proper heat treatment, a certain degree of toughness, plasticity and wear resistance can be obtained.

Normalizing can promote the spheroidization of the structure and improve the cutting performance of the blank with a hardness of less than 160HBS.

Tempering at a temperature of 550~570℃, the steel has the best comprehensive mechanical properties.

The hardenability of this steel is higher than that of 45 steel, and it is suitable for surface hardening treatments such as high frequency quenching and flame quenching.

40. XNUMXcr quenching and tempering hardness:

40C调质加工以后的硬度大概在HRC32-36之间，也就是说大概HB301-340之间。

40Cr-830-860℃ oil quenching->55HRC

Tempering at 150℃ -55HRC

Tempering at 200℃ -53HRC

Tempering at 300℃ -51HRC

Tempering at 400℃ -43HRC

Tempering at 500℃ -34HRC

Tempering at 550℃ -32HRC

Tempering at 600℃ -28HRC

Tempering at 650℃ -24HRC

XNUMX. Quenching process:

40Cr淬火850℃，油冷；回火520℃，水冷、油冷。40Cr表面淬火硬度为HRC52-60，火焰淬火能达到HRC485-5。

Three, 40cr use:

1. After quenching and tempering, it is used to manufacture mechanical parts that are subjected to medium load and medium speed work, such as the rear half shaft of the steering knuckle of the automobile and the gears, shafts, worm gears, etc. on the machine tool.Spline shaft, Top sets, etc.

2. After quenching and tempering at medium temperature, it is used to manufacture high-load, magical and medium-speed working parts, such as gears, main shafts, oil pump rotors, sliders, collars, etc.

3. After being quenched and tempered at low temperature, it is used to manufacture parts with heavy load, low impact and wear resistance, and the solid thickness on the section is below 25mm, such as worm gear, main shaft, shaft, collar, etc.

4. After quenching and tempering and high-frequency surface quenching, it is used to manufacture parts with high surface hardness and wear resistance without great shock, such as gears, sleeves, shafts, main shafts, crankshafts, spindles, pins, screws Caps, intake valves, etc.

5. Manufacture various transmission parts that undergo carbonitriding treatment, such as gears and shafts with large straightness and good low-temperature toughness.

40cr仅为齿轮加工所用材质中的一种，其它的还有C45、16MNCR5、42cr等，不清楚的都可向EP Precision gear machining Free consultation.