It is like a Transformer, sometimes split into two Luxor 3200 tons, and sometimes "evolved" into a 136-meter-high giant, a body will lift 6400 tons of weight to 120 meters high. This is a 6400-ton hydraulic compound crane jointly developed by Sinochem Construction Group, Taizhong Group and Zhongke Synthetic Oil. On July 12, the device successfully performed a double-lift experiment and successfully passed user acceptance. Compared with the large crawler cranes that are often used in the past, the outstanding features of this equipment are the largest lifting weight in the world and the highest lifting height in the world. Its maximum lifting weight is 6,400 tons, which is equivalent to the weight of 100 full-load train skins. In addition, it also has a combination of flexible conditions that can be used independently and disassembled. The original dual-stage design has obvious advantages in the overall lifting. In the process of disassembling and assembling the equipment, more than 300 chords and more than 1,680 web members can be assembled at any time, which greatly facilitates on-site assembly and improves construction efficiency. The whole machine can be divided into two working conditions of single and double doors. Each working condition can have different combinations of spans and heights.
At present, the rapid development of the petrochemical industry and the coal-to-oil industry has increased the demand for large-tonnage cranes. The superlifting capacity of the 6400-ton hydraulic demrick cranes can meet the lifting production requirements of large-scale containers in the next 5 to 10 years by Sinochem Erjian Construction Group, and it has become the strongest lifting capacity in the industry.
During the development of the equipment, Taizhong Heavy Industries Group adopted new technologies and new processes such as synchronous control technology of gantry lift-up and 16 main lifter synchronous control technologies. At present, four patents have been authorized.
Heat Treated Steel Bar And Tube
HEAT TREATED STEEL BAR AND TUBE
Heat treated steel bar is produced by heating and cooling in different temperature based on the steel grades to improve the steel bar mechanical properties or machinability for various industrial applications. Heat treated steel bar includes annealed steel bars, Normalized Steel Bar, quenched and temper qt steel bar.
Annealed Steel Bar has better ductility and lower hardness, which can be easier to be machined. The annealing processing is usually widely used for steel grade with higher carbon content above 0.5%. However, some low carbon steel also requires to do annealing for special usage such as 20CrMnTi gear steel. For some special material such as 20CrMnTi gear steel and GCr15 such bearing steel, spheroidizing annealing is often required.
Normalized steel bar sometime is also one kind of annealing processing. It mainly changes the grain to remove the impurities in steel and improves the strength and hardness. For some hot rolled steel bars, to keep the basic mechanical properties, normalizing is often used.
Quenching and Tempering, abbreviated as Q&T is a king of processing that strengthen or harden steel bars by heating the materials and then cooling in water, oil or other liquid medium, that rapidly the change from austenite to perlite to get the proper properties for various usage. The quenched & tempered steel bar materials are usually with carbon from 0.30% - 0.60%, it is widely used as merchant bars in components of various machines.
Our advantages on producing heat treated steel bars:
1) Big stocks of hot rolled round bars or wire rods as raw materials
2) Wide range of Cold Drawn Steel Bar sizes: from 10mm to 150mm
3) Different cold drawing medias powder or oil to get different surface
4) Straightening machines to get better straightness up to 0.5mm/m
5) Grinding and polishing machines to get better roughness upto 0.4um
6) Heat treating furnaces to adjust the mechanical properties
7) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.
8) Multiple packages to avoid broken packages and anti-rusty
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