GCr15SiMn bearing steel

，介绍GCr15SiM

Introduction

GCr15SiMn bearing steel is widely used in various kinds of rolled bearings and can be used for different models and sizes. It has good comprehensive properties, high hardness, high-frequency quenching performance, higher load capacity and good fatigue resistance. Compared with ordinarychromium bearing steel, GCr15SiMn bearing steel has excellent comprehensive performance, high strength, high hardness, good wear resistance and fatigue resistance, good machinability and welding performance. Under the premise of ensuring the performance, the production cost can be saved and the bearing life of the product can be improved.

Composition

GCr15SiMn bearing steel is a kind of low carbon alloy steel which is mainly composed of carbon (C), chromium (Cr), silicon (Si), manganese (Mn) and other elements in a certain proportion. It contains 0.95 to 1.05% of carbon (C), 1.35 to 1.8% of chromium (Cr), 0.15 to 0.3% of silicon (Si), 0.6 to 0.9% of manganese (Mn) and trace amounts of sulfur (S) and phosphorus (P).

Physical and Chemical Properties

GCr15SiMn bearing steel has a higher strength and can be directly used for hardening. The hardness value before quenching can reach HRC50-HRC60, and the hardness value after quenching can reach HRC14-HRC20. In addition,GCr15SiMn bearing steel has good wear resistance and fatigue resistance performance, good machinability and can be welded easily. The following table lists the physical and chemical properties of GCr15SiMn bearing steel.

Property Value

Ultimate Tensile Strength 885-1070 MPa

Yield Strength 595-830 MPa

Elongation 9-13 %

Reduction of Area 13-30 %

Hardness HRC50-HRC60

Thermal Conductivity 11-25 W/m.K

Young’s Modulus 180-210 GPa

Melting Point 1400-1450 ℃

Heat Treatment

GCr15SiMn bearing steel can be used for oile-hardening, water-hardening and air-hardening. After heat treatment, the hardness can reach ?HB270-HB330; and the hardness after quenching can reach ?HRC14-HRC20. After carburizing and quenching, the bearing with GCr15SiMn bearing steel can have lower manufacturing costs and long service life.

Application

Because GCr15SiMn bearing steel is excellent in terms of comprehensive performance, it is widely used in various kinds of rolled bearings. It has low prices but good performance, so it is the most widely used bearing steel material. Generally, it is used for the production of all kinds of bearings such as automobile bearings, motor bearings, agricultural machinery bearings and so on. Additionally, it can be used for the production of gear, shaft, instrument and meter, gear transmission parts, etc. In summary, GCr15SiMn bearing steel is a good material for the production of bearings and other parts.

Conclusion

GCr15SiMn bearing steel is one of the most popular bearing steel materials due to its low price and good performance. It is widely used in various kinds of rolled bearings and can be used for different models and sizes. It has good comprehensive properties, high hardness, high-frequency quenching performance, higher load capacity and good fatigue resistance. In addition, it has good wear and tear resistance, excellent machinability and welding performance.

GCr15SiMn bearing steel is a kind of bearing steel characterized by low chromium content, high surface hardness and high shock resistance after quenching and tempering. It is usually used to make various precision bearings.

GCr15SiMn bearing steel belongs to the family of bearing steels, which is a kind of high carbon chromium bearing steel with a Mn content of 1.0~1.45%. After quenching and tempering, it has good wear resistance, high hardness and good and continuous mechanical properties. The addition of Mn during the smelting process can refine grains and improve the hardenability.

GCr15SiMn bearing steel chemical composition and mechanical properties are shown in Table 1. The mechanical properties of GCr15SiMn bearing steel can reach HRC60-64, and the microstructure is mostly tempered sorbite, which can maintain good fatigue strength, wear resistance and lubrication retention in high speed and heavy load operations.

In addition, GCr15SiMn bearing steel is suitable for processing medium complex parts, requiring good work hardening effect and wear resistance. Common applications include a variety of precision bearings, automotive engine bearing assemblies and aircraft engine bearing parts, as well as a variety of non-self-aligning bearing seat parts.

In summary, GCr15SiMn bearing steel has the characteristics of low chromium content, high surface hardness and high shock resistance after quenching and tempering, good work hardening effect, wear resistance and lubrication, suitable for processing medium complex parts, the application of various precision bearings, etc.