在圓錐滾子徐州SKF軸承的磨削過程中，砂輪與工件的接觸區(qū)消耗大量的能*量，產(chǎn)生大量的磨削熱，導(dǎo)致磨削區(qū)局部瞬時高溫。磨削區(qū)的瞬時溫度為0.1-0.001，**大為1000-1500（？）c.利用線性移動熱源傳熱理論*公式或紅外、熱電偶法推導(dǎo)、計算或測量實驗條件下的瞬時溫度。這種瞬間高溫足以引起高溫氧化、無定形結(jié)構(gòu)、高溫回火、二次淬火，甚至在工作表面一定層次的表面上燒制。

In the grinding process of SKF bearing with tapered roller in Xuzhou, a large amount of energy is consumed in the contact area between grinding wheel and workpiece, resulting in a large amount of grinding heat, resulting in local instantaneous high temperature in the grinding area. The instantaneous temperature in the grinding zone is 0.1-0.001 and ** is 1000-1500 (?) C. Derivation, calculation or measurement of instantaneous temperature under experimental conditions using linear moving heat source heat transfer theory* formula or infrared and thermocouple methods. This instantaneous high temperature is sufficient to cause high temperature oxidation, amorphous structure, high temperature tempering, secondary quenching, and even firing on a certain level of working surface.

（1）表面氧化層

(1) Surface oxide layer

在徐州SKF軸承瞬間高溫的作用下，鋼表面與空氣中的氧氣反應(yīng)，形成一層很薄（20-30）的氧化鐵層。值得注意的是，氧化層的厚度對應(yīng)于表面磨料變質(zhì)層的總厚度。結(jié)果表明，氧化層厚度與磨削過程直接相關(guān)，是衡量磨削質(zhì)量的重要指標。

Under the action of instantaneous high temperature of Xuzhou SKF bearing, the steel surface reacts with oxygen in the air to form a very thin (20-30) layer of iron oxide. It is noteworthy that the thickness of the oxide layer corresponds to the total thickness of the surface abrasive metamorphic layer. The results show that the oxide layer thickness is directly related to the grinding process and is an important index to measure the grinding quality.

（2）非晶態(tài)結(jié)構(gòu)層

(2) Amorphous structure layer

當(dāng)工件表面在徐州SKF軸承磨削區(qū)瞬時高溫下熔化時，熔化的金屬分子流均勻地覆蓋工作表面，以很快的速度冷凝母材，形成非常薄的非晶態(tài)結(jié)構(gòu)。它有很高的硬度和韌性，但只有10左右。精*密磨削容易去除。

When the workpiece surface melts at the instantaneous high temperature in the grinding zone of Xuzhou SKF bearing, the molten metal molecule flow uniformly covers the working surface and condenses the base metal at a fast speed, forming a very thin amorphous structure. It has high hardness and toughness, but only about 10. Precision * dense grinding is easy to remove.

（3）雙淬火層

(3) Double quenched layer

當(dāng)磨削區(qū)的瞬時高溫將工件表層加熱到奧氏體化溫度（1）以上時，在隨后的冷凝過程中，該層的奧氏體化結(jié)構(gòu)被重新淬火為馬氏體。徐州SKF軸承二次淬火燒*傷的工件在二次淬火層下**須有一個硬度很低的高溫回火層。

When the instantaneous high temperature in the grinding zone heats the surface layer of the workpiece above the austenitizing temperature (1), the austenitizing structure of the layer is re-quenched to martensite in the subsequent condensation process. The workpiece burned by secondary quenching of Xuzhou SKF bearing must have a high temperature tempering layer with very low hardness under the secondary quenching layer.

（4）磨削裂紋

(4) Grinding Cracks

二次淬火燒*傷可以改變工件表面層的應(yīng)力。當(dāng)軸承識別出軸承的真假時，通過觸摸軸承上的鋼印，可以更快、更準確地識別徐州SKF軸承。如果你用手觸摸郵票，它就沒有任何接觸。但是如果你用指甲輕輕地觸摸郵票，你會感到郵票被壓縮了。鋼印下高溫回火區(qū)的材料具有**大的拉應(yīng)力，**有可能發(fā)生在此處。裂縫的核心。裂紋**容易沿原始奧氏體晶界擴展。嚴重?zé)?/span>*傷會導(dǎo)致整個磨削表面出現(xiàn)裂紋（主要是裂紋），導(dǎo)致工件報廢。

Secondary quenching burns can change the stress of the workpiece surface layer. When bearing recognizes the true or false of bearing, it can recognize Xuzhou SKF bearing more quickly and accurately by touching the steel mark on the bearing. If you touch the stamp with your hand, it has no contact. But if you touch the stamp gently with your nails, you will feel the stamp compressed. The material in high temperature tempering zone under steel stamp has ** large tensile stress, and ** may occur here. The core of the crack. Cracks ** tend to propagate along the original austenite grain boundary. Severe burns will lead to cracks (mainly cracks) on the whole grinding surface, leading to the scrap of the workpiece.

文章來自：徐州SKF軸承 www.wh-skf.com

Article from: Xuzhou SKF Bearing www.wh-skf.com

文章來自：徐州INA軸承 www.ina-china.cn

Article from: Xuzhou INA Bearing www.ina-China.cn

文章來自：徐州NSK軸承 www.klbbearings.com

Article from: Xuzhou NSK Bearing www.klbbearings.com

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