1. Product description
In order to reduce the cost, the thickness of tantalum in the composite plate should be as small as possible. In design, carbon steel shall be selected as the base to bear the strength load, and tantalum as the coating to solve the corrosion resistance problem. Generally, tantalum thickness is not considered in strength calculation Degrees. The melting point of tantalum is 2996 ℃, while the melting point of steel is about 1500 ℃. The difference between the melting points of tantalum and steel is huge, which is very unfavorable for welding, especially with the thinning of tantalum material thickness, the welding difficulty further increases.
2. Product Features
Tantalum is a rare metal with a melting point as high as 2996 ℃, which can only be melted by an electron beam or vacuum arc. The hardness of tantalum is high, but it has good toughness and ductility, so its high-temperature strength and processability are good; Tantalum has a low content in nature, and its smelting energy consumption is high, so its cost is expensive. Therefore, it is generally used when other metals are difficult to replace it. The tantalum vessel clad plate is mainly used in the production process of strong acids (hydrochloric acid, sulfuric acid, and nitric acid), hydrogen peroxide, bromine, chlorine and petroleum industry, and its main application forms include reactor, heat exchanger and other pressure vessels. Tantalum directly used in the manufacture of pressure vessels is expensive and wasteful, so the composite plate lining structure is mainly used. In order to reduce the cost, foreign manufacturers use tantalum plate or tantalum when manufacturing, and the tube thickness is generally 0.4~1mm. Tantalum is easy to be damaged in practical use due to its small thickness.
3. Why choose us
The company has 330 employees, and its main production area covers an area of about 150 mu. The company has five production workshops, including a surface treatment workshop, tailor welding workshop, heat treatment workshop, straightening workshop, and machining workshop, covering an area of 18000 square meters; There is a material warehouse with two main products and four auxiliary materials of about 3000 square meters. The company now has more than 80 sets (pieces) of large-scale equipment and special equipment, such as nine roll straightener, hydraulic press, large volume annealing furnace, 12000 mm high-precision milling machine, water cutting machine, hydraulic plate shearing machine, plasma welding machine, etc. The company's total assets have reached hundreds of millions of yuan.
4. FAQ
Key points of the tantalum vessel process
As the melting point of tantalum differs greatly from that of steel, tantalum cannot be directly welded to the steel base. Before welding, the tantalum layer on both sides of the groove shall be polished and removed. After the steel base course is welded and polished flush, the vacant part shall be filled with suitable filler strip materials. The spacer strip is mainly used for mechanical support, and its thickness shall be consistent with the tantalum lining layer. Shao Feng [1] pointed out that:
Tantalum vessel clad plate (with similar properties of the two metals) can be used at the longitudinal circumferential seam of tantalum composite plate kettle body, and titanium spacer strips can be used for the rest. After manufacturing, 10% (volume fraction) ammonia shall be injected into the leak detection structure for inspection.
The interval is 0.5 h and the pressure is 0.15 MPa.
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