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Mechanical Properties

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20Cr2Ni4A steel. 20Cr2Ni4A - Gear steel bar | BEBON steel expert. The material 20Cr2Ni4A is a kind of structural alloy steel. 20 cr2ni4a is high quality alloy steel and it has high strength,toughness and hardenability.For 20Cr2Ni4A ...

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20Cr2Ni4A. The material 20Cr2Ni4A is a kind of structural alloy steel. 20 cr2ni4a is high quality alloy steel and it has high strength,toughness and hardenability.For 20Cr2Ni4A steel, there is no direct quenching after carburizing in order to reduce surface residual austenite. 20Ci2Ni4A’s cutting and cold deformation plasticity is general and it has poor weldability.

CN102021588A - 20Cr2Ni4A steel carburizing and ...

The invention discloses a 20Cr2Ni4A steel carburizing and nitrocarburizing multiplex heat treatment process, which comprises the following process flows of: putting components made of 20Cr2Ni4A steel into a carburizing furnace, carburizing at the temperature of between 900 and 930 DEG C for 4.5 to 6 hours, discharging and performing air cooling; performing heat treatment on the carburized ...

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20Cr2Ni4A gear steel bar. 20Cr2Ni4A gear steel bar is high quality of alloy steel bar, high intension, tenacity and harden ability.After cementite can't quench directly for the reduction of surface retained austenite.Machinability and

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Influence of high temperature tempering on retained ...

The main ways for reducing retained austenite of carburized 20Cr2Ni4A steel are high temperature tempering and cryogenic treatment. The influence of different high temperature tempering on ...

Influence of high temperature tempering on retained ...

The main ways for reducing retained austenite of carburized 20Cr2Ni4A steel are high temperature tempering and cryogenic treatment. The influence of different high temperature tempering on ...

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As a low-carbon alloy steel, 20Cr2Ni4A steel has an excellent mechanical properties. It has been used for producing heavy-duty gears, which require good wear and fatigue resistance.

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Variable contour two-step warm extrusion forming of

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The steel can be quenched directly with high-temperature or high-frequency quenching directly with the simple heat treatment process can be obtained GCr18Mo isothermal treatment or mechanical properties of the obtained carburized 20Cr2Ni4A, and some mechanical properties, such as impact value ak, pressed plastic deformation resistance and other ...

Influence of ceramic coating of MgO on oxidation behavior ...

The coatings on 20Cr2Ni4A steel substrates were prepared by high-volume low pressure (HVLP) spray method. The HVLP spray gun was connected to an industrial compressor with 3 hp. Then, the coated sample was dried at 100 °C for 1 h.

Replacement of conventionally complex processing for low ...

This paper deals with the effects of rare earth (RE) addition on the microstructure and properties of 20Cr2Ni4A steel carburised at 860°C. Compared with conventional 920°C carburising and other complex treatments, finer and more dispersed carbide precipitates formed in the surface layers.Published in: Materials Science and Technology · 2001Authors: M F Yan · C H Cai · Z R LiuAffiliation: Harbin Institute of TechnologyAbout: Temple · Indentation hardness · Precipitation · Metallography · Tempering · Cementation

High Stength Alloy Structural Steel 20Cr2Ni4A Hot Rolled ...

The material 20Cr2Ni4A is a kind of structural alloy steel. 20 cr2ni4a is high quality alloy steel and it has high strength,toughness and hardenability.For 20Cr2Ni4A steel, there is no direct quenching after carburizing in order to reduce surface residual austenite. 20Ci2Ni4A’s cutting and cold deformation plasticity is general and it has poor weldability.

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The castellated shaft material is a 20Cr2Ni4A steel. After quenching and high-temperature tempering, Spline Nos. 2 and 3 are laser quenched and the other dimension is carbonized.

Experimental Study on the Influence of Vacuum ...

20Cr2Ni4A steel is a kind of high quality steel mainly used for manufacturing high-duty gears in the world. The high-duty gear with good performance must have wear and fatigue resistance ...

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During the experiments, 20Cr2Ni4A steel are selected as the materials, which endure the relatively great concussion load in the bad condition, and the gaps’ long-time permanence experiments and short-time tension and concussion experiments have been done.

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AN INVESTIGATION OF CERTAIN INTERGRANULAR CRACKS

An investigation has been carried out on the so-called intergranular cracks appearing in the central part of a macroetched transverse section of a 20Cr2Ni4A steel billet. It is shown that this in fact was a kind of acid-etching phenomenon, due to low-melti...

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Abstract As a low-carbon alloy steel, 20Cr2Ni4A steel has an excellent mechanical properties. It has been used for producing heavy-duty gears, which require good wear and fatigue resistance.

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New observation of martensitic morphology and

Fig. 4--Transmission electron micrographs of 20Cr2Ni4A steel after quenching from 900 ~ (a) not tilted, (b) 2.5 deg tilted, and (c) 7 deg tilted (Magnification 40,000 times). plane of martensite, can micrographs such as that shown

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A scanning auger microscopy characterization of the ...

A Scanning Auger Microscopy Characterization of the Internal Oxidation Produced on Carburizing J.D. Verhoeven, Nailu Chen, and A.J. Bevolo ... and 4320 and the Chinese steel 20Cr2Ni4A. Chemical analyses were carried out on the three alloy steels and the results are given in ... A scanning auger microscopy characterization of the internal ...

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Contents

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