Steel Q235 and stainless steel can be welded.
Friction welding is suitable for welding dissimilar steels and dissimilar metals. Friction welding can not only weld ordinary dissimilar steels, but also weld dissimilar steels and dissimilar metals with widely different mechanical and physical properties at room temperature and high temperature, such as carbon structural steel-high-speed tool steel; copper-stainless steel, etc. In addition, it can also weld dissimilar metals that produce brittle alloys well, such as aluminum-copper, aluminum-steel, etc.
Weldments have high dimensional accuracy. The maximum error in the total length of the diesel engine pre-combustion chamber produced by friction welding is ±0.1 mm. Some special friction welding machines can ensure that the length tolerance of the weldment is ±0.2 mm and the eccentricity is less than 0.2 mm. Therefore, friction welding is not only used to weld blanks, but also to weld assembled finished products.
The welding machine has low power and saves energy. Compared with friction welding and flash welding, the energy saving is about 80~90%. The working place of friction welding is hygienic, without sparks, arc light and harmful gases, which is conducive to environmental protection and is suitable for use in automatic production lines together with other advanced metal processing methods.
Extended information
The biggest difference between friction welding and traditional fusion welding is that during the entire welding process, the temperature at which the metal to be welded gains energy and rises does not reach its melting point, that is Metal is a forging-like solid phase connection achieved in a thermoplastic state.
Compared with traditional fusion welding, friction welding has high quality welding joints, can achieve the same strength as the weld seam and the base material, has high welding efficiency, stable quality, good consistency, and can realize welding of dissimilar materials.
The origins of friction welding can be traced back to 1891 AD, when the first patent for this welding method was granted in the United States. The patent uses frictional heat to connect steel cables. Subsequently, Germany, the United Kingdom, the Soviet Union, Japan and other countries successively carried out the production and application of friction welding. Our country is one of the earliest countries in the world to study friction welding. As early as 1957, it successfully experimented with aluminum-copper friction welding.
For many years, friction welding has been highly valued by the manufacturing industry for its technical characteristics of high quality, high efficiency, energy saving and non-pollution. In particular, new technologies for friction welding have been continuously developed, such as superplastic friction welding, Linear friction welding, friction stir welding, etc.
It has been increasingly widely used in high-tech fields such as aviation, aerospace, nuclear energy, and ocean development, as well as in industrial sectors such as electric power, machinery manufacturing, oil drilling, and automobile manufacturing.
Reference: Baidu Encyclopedia-Friction Welding