Shang Pu consulting machinery industry analyst pointed out that: large-tonnage crawler cranes are mostly customized products, more used in large-scale nuclear power plant construction. The development situation of large-tonnage crawler cranes is prosperous, but in 2011, the leakage of nuclear power in Japan poured cold water for its development. At present, China's large-scale lifting machinery is mainly used in nuclear power, wind power, water conservancy and other construction. The leakage of nuclear power from Japan to the world’s nuclear power has sounded the alarm. Nuclear power construction in various countries has been halted. China has also asked to suspend approval of nuclear power projects. For a time, the vigorous construction of nuclear power fell into a dilemma. Can the development trend of large-tonnage development of belt cranes continue? For the large tonnage crawler crane industry trends in the future are more optimistic. Because the current domestic conversion rate, currently only 40%, there is still much room for improvement compared with developed countries; from the macroeconomic point of view, 2012 is expected to reach 9% of the economic growth rate. To achieve this level, it still depends on investment. Therefore, the future situation of construction machinery is still good. Large-tonnage crawler cranes are also good for the future.
According to the “2016-2016 China Container Crane Market Analysis and Investment Value Study Report†published by Champion Consulting, it shows that in 2012, the crane market will be “low before and after high†compared to 2011, and the overall situation will be 2011. Flat. Since the construction of railways and nuclear power will recover in 2011 after the silence in 2011, the market demand for large-tonnage car cranes will be better than in 2011, or will maintain an increase of around 10%. The role of large-tonnage crawler cranes will be increasingly favored with the use of customers. Although the growth rate will not be as high as in 2011, it will also increase.
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