According to the Xinhua News Agency, Changchun, August 10th, recently, CRH380BL EMUs used by the Beijing North Railway Group's Changke Stock Co., Ltd. for the Beijing-Shanghai line have experienced three consecutive failures of two EMUs in the process of delivery to the Shanghai Railway Bureau. After the failure, CNR quickly conducted a full-scale survey of the CRH380BL EMUs that had been delivered and not delivered, thoroughly investigated the potential accidents, and strengthened the management of suppliers.

The relevant person in charge of the CNR passengers said that it is expected that the census will be completed in about one month to achieve normal delivery.

Zhao Minghua, deputy general manager of CNR and high-speed MU project manager, told Xinhua News Agency on the 10th that the fault of the EMU before this was a protective fault, mainly due to sensor abnormalities leading to automatic parking.

After the fault occurred, CNR's passengers suspended the delivery of the CRH380BL train and conducted a comprehensive survey of the CRH380BL train. Currently, CNR Changke has dispatched more than 30 census teams to Beijing, Shanghai, Jinan and other places to carry out a general survey of trains, mainly concerning the degree of sensor insulation and the firmness of wiring.

Wear Resistant Steel Plate

Wear-resisting Steel Plate is composed of low Carbon Steel Plate and alloy wear-resisting layer. When working, the matrix provides comprehensive properties such as strength, toughness and plasticity of resisting external forces, and the alloy wear-resistant layer provides wear-resistant properties that meet the requirements of specified working conditions.

Wear-resisting steel alloy wear-resisting layer and base plate are metallurgical combination. By means of special equipment and automatic welding process, the high-hardness self-protecting alloy wire is uniformly welded on the substrate, and the composite layers are one to two or even more. In the composite process, due to the different shrinkage ratio of the alloy, uniform transverse cracks appear, which is a significant feature of the wear-resistant steel plate.

The wear resistant layer of the alloy is mainly chromium alloy, while manganese, molybdenum, niobium, nickel and other alloys are added. The microhardness of carbide can reach above hv1700-2000, and the surface hardness can reach hrc58-62. Carbide alloy has a strong stability at high temperature, maintain a high hardness, but also has a good oxidation resistance, within 500℃ completely normal use.

The wear-resistant layer has narrow channel (2.5-3.5mm), wide channel (8-12mm), curve (S, W), etc. It is mainly composed of chromium alloy, while manganese, molybdenum, niobium, nickel, boron and other alloy components are added. With 40-60% carbide content, the microhardness can reach above HV1700 and the surface hardness can reach hrc58-62.

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Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhouiron.com