轴承的原材料是钢材，钢材的质量直接影响轴承生产后的质量，因此对轴承钢的要求相当严格。提出了轴承钢冶金质量的基本要求。
Bearing raw material is steel, the quality of steel directly affects the quality of bearing after production, so the requirements of bearing steel is quite strict. The basic requirements for metallurgical quality of bearing steel are put forward.
高碳铬轴承钢是一种常用的镇江SKF轴承钢。它含有约1个百分点的碳，1.5个百分点的铬和少量的锰和硅过共析钢。铬能提高钢的回火淬透性、热处理性能、***均匀性和稳定性，改变钢的抗锈性和磨削性能。
High carbon chromium bearing steel is a commonly used Zhenjiang SKF bearing steel. It contains about 1 percentage points of carbon, 1.5 percentage points of chromium and a ***all amount of manganese and silicon hypereutectoid steel. Chromium can improve the tempering hardenability, heat treatment performance, microstructure uniformity and stability of steel, and change the rust resistance and grinding performance of steel.
当铬含量超过1.65时，残余奥氏体含量增加，硬度和尺寸稳定性降低，碳化物不均匀性增加，冲击韧性和疲劳强度降低。因此，高碳铬轴承钢中的铬含量一般控制在1或65个百分点以下。只有严格控制轴承钢的化学成分和硬度，才能通过热处理工艺获得满足镇江SKF轴承***和性能的轴承。
When chromium content exceeds 1.65, retained austenite content increases, hardness and dimensional stability decrease, carbide inhomogeneity increases, impact toughness and fatigue strength decrease. Therefore, chromium content in high carbon chromium bearing steel is generally controlled below 1 or 65 percentage points. Only by strictly controlling the chemical composition and hardness of bearing steel can the bearing satisfying the structure and properties of Zhenjiang SKF bearing be obtained by heat treatment process.
滚动轴承钢需要高尺寸精度，因为大多数轴承部件须由压力形成。为了节省材料，提高劳动生产率，大多数轴承环锻造成冷镦或热轧球，线圈也通过冷镦成形。如果钢的尺寸精度不高，则无法准确计算冲裁件的尺寸和重量，无法保证轴承零件的质量，容易造成设备损坏和***。
Rolling bearing steel requires high dimensional accuracy because most bearing parts must be formed by pressure. In order to s***e materials and improve labor productivity, most bearing rings are forged to form cold upsetting or hot-rolled balls, and the coils are also formed by cold upsetting. If the dimension accuracy of steel is not high, the size and weight of blanking parts can not be accurately calculated, the quality of bearing parts can not be guaranteed, and equipment damage and death can easily be caused.
钢的纯度是指钢中非金属夹杂物的数量和纯度较高，钢中的夹杂物减少。例如，轴承钢中氧化物和硅酸盐的***夹杂物导致早期疲劳剥落和镇江SKF轴承寿命显著降低。特别是脆性夹杂物在加工过程中容易从金属基体上脱落，严重影响轴承零件加工后的表面质量，对轴承零件的损伤大。因此，为了提高轴承的使用寿命和可靠性，须降低轴承钢中夹杂物的含量。
The purity of steel means that the quantity and purity of non-metallic inclusi*** in steel are high and the inclusi*** in steel are reduced. For example, harmful inclusi*** of oxides and silicates in bearing steels lead to early fatigue spalling and a significant reduction in the life of Zhenjiang SKF bearings. Especially brittle inclusi*** are easy to fall off from the metal matrix in the process of machining, which seriously affects the surface quality of bearing parts after machining and causes great damage to bearing parts. Therefore, in order to improve the service life and reliability of bearing, it is necessary to reduce the content of inclusi*** in bearing steel.
轴承钢的低速率结构是指一般的孔隙率、中点孔隙率和平坦度。显微***（高功率）由退火结构、碳化物网络、带状和液态析出物组成。碳化物是液态的，硬脆的，其危害性与脆性夹杂物相同。网状碳化物降低了镇江SKF轴承钢的冲击韧性，导致***不均匀、淬火、变形和开裂。带状碳化物影响退火和淬火回火***和接触疲劳强度。低速和高速结构的质量对滚动轴承的性能和使用寿命有很大的影响。因此，在轴承材料标准中，对低利率和高利率的结构有严格的要求。轴承的原材料是钢材，钢材的质量直接影响轴承生产后的质量，因此对轴承钢的要求非常严格。提出了轴承钢冶金质量的基本要求。
The low rate structure of bearing steel refers to the general porosity, midpoint porosity and flatness. The microstructure (high power) c***ists of annealing structure, carbide network, ribbon and liquid precipitates. Carbide is liquid, hard and brittle, and its harmfulness is the same as that of brittle inclusion. The network carbide reduces the impact toughness of Zhenjiang SKF bearing steel, resulting in uneven microstructure, quenching, deformation and cracking. Zonal carbides affect annealing and quenching tempering structure and contact fatigue strength. The quality of low speed and high speed structure has a great influence on the performance and service life of rolling bearings. Therefore, in the bearing material standard, there are strict requirements for the structure of low interest rates and high interest rates. Bearing raw material is steel, the quality of steel directly affects the quality of bearing after production, so the requirements of bearing steel are very strict. The basic requirements for metallurgical quality of bearing steel are put forward.
文章来自：镇江SKF轴承 www.wh-
The article is from: Zhenjiang SKF bearing www.wh-
文章来自：镇江INA轴承 a-
The article is from: Zhenjiang INA bearing a-
文章来自：镇江NSK轴承
The article is from: Zhenjiang NSK bearing
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