News dynamics

2023/10/23

Characteristics and Uses of Nickel

Nickel is a lustrous silvery-white metal with a silver-white tint of pale gold. Nickel is a transition metal, hard, ductile. The chemical activity of pure nickel is quite high, which can be seen in the powder state of the reaction surface area, but the bulk nickel metal reacts slowly with the surrounding air because a layer of oxide with protective properties has been formed on its surface. Even so, because the activity between nickel and oxygen is high enough, it is difficult to find natural metallic nickel on the earth's surface. The natural nickel on the earth's surface is sealed in larger nickel-iron meteorites because meteorites do not have access to oxygen when they are in space. On Earth, this natural nickel is always combined with iron, which reflects the fact that they are the main end products of supernova nucleosynthesis. It is generally believed that the earth's core is composed of a mixture of nickel and iron.

2023/10/23

And nickel alloy development status and demand analysis

Nickel is a ferromagnetic metal element with excellent properties such as corrosion resistance, high temperature resistance, oxidation resistance and good ductility. It is widely used in metallurgy, chemical industry, aerospace and other fields. It is an important raw material for the preparation of stainless steel, high temperature alloy, power battery and other materials, and belongs to the key strategic metal resources. The world's nickel resources are mainly distributed in Indonesia, Australia, Brazil and Russia, while China's nickel reserves account for less than 3%, which is a typical "less nickel" country.

2023/10/20

Corrosion resistance of stainless steel

The corrosion resistance of stainless steel generally increases with the increase of chromium content. The basic principle is that when there is enough chromium in the steel, a very thin and dense oxide film is formed on the surface of the steel, which can prevent further oxidation or corrosion. The oxidizing environment can strengthen the film, and the reducing environment will inevitably destroy the film, resulting in corrosion of steel.

2023/10/23

Introduction of Material Standard of Alloy Steel Pipe

The main alloying elements in the steel of the alloy steel pipe, except for individual microalloying elements, are generally expressed in a few percent. When the average alloy content is less than 1.5, only the element symbol is generally marked in the steel grade, but the content is not indicated. However, if it is easy to confuse under special circumstances, the number "1" can also be marked after the element symbol, such as steel grades "12CrMoV" and "12Cr1MoV". The chromium content of the former is 0.4-0.6, the latter is 0.9-1.2, and the other components are all the same.

2023/10/23

Titanium pipe welding process

Pipe cutting and groove processing; pipe cutting and groove processing should be carried out in a special work site by mechanical processing methods. When processing to use non-polluting media clean water for cooling, to prevent oxidation. Processing tools should be dedicated and kept clean to prevent iron contamination. The processed pipe orifice shall be smooth and free from defects such as cracks and heavy skin. The inclination deviation of the cut plane shall not exceed 1% of the pipe diameter.

2023/10/23

Discussion on Welding Quality Control of Titanium Alloy Pipe

Titanium pipeline titanium and titanium alloy with its excellent acid corrosion resistance is valued by people, more and more are used to manufacture to set up equipment and process pipeline, applied to the reactor with strong acid material, pipeline. However, titanium and titanium alloys are easy to react with a variety of elements and compounds at high temperatures and embrittlement. In particular, during the welding process, once the oxygen, nitrogen and other elements in the air are absorbed, dissolved in titanium metal will make the alloy obviously harden, reduce the ductility of titanium metal and make it brittle, causing pipe fracture and equipment damage. Therefore, it is of great significance to study the welding of titanium and titanium alloys for the setting and maintenance of consumer devices in which they are applied.