Heat treatment is an important process method to obtain the service performance of casting parts to meet the needs of working conditions through heating and cooling, so as to give full play to the potential of materials, improve the service life and efficiency of products. If there are heat...
Aging treatment is used to eliminate the stress of castings, and the main factor affecting the stress elimination of castings is the heat treatment process parameters. Stress relief annealing is a process of heating the workpiece to an appropriate temperature of 100 ℃ ~ 200 ℃ below AC1 and...
Heat treatment furnace is mainly divided into gas furnace, electric heating furnace and gas electric heating furnace. 1. Gas furnace The gas furnace uses a burner to ignite natural gas or gas and introduce high-pressure air to ensure sufficient combustion and heat circulation in the furnace and stable temperature...
At present, the methods to eliminate stress in engineering include traditional natural aging, thermal aging and vibration aging. 1. Natural aging Natural prescription is the oldest method of prescription. Relying on the power of nature, after months to years of wind, sun, rain and seasonal temperature changes, it has...
At present, with the development of marine engine to large-scale, the demand for large cylinder diameter, large tonnage and high-performance engine castings is increasing. In order to meet the market demand for high-performance engines, our factory, as the production base of high-end Large Engine Castings, has also carried out...
Grain refinement has always been an effective method to improve the strength and toughness of metal materials in the field of metal materials. The metal structure is composed of many grains. The more grains per unit area, the finer the grains. On the contrary, the coarser the grains. When...
The heat treatment process direction is mainly studied, and the following are several strengthening types: (1) Solid solution strengthening This kind of solid solution strengthening by adding other elements to the base metal is called solid solution strengthening. The effect can be achieved by adding some alloy elements to...
Take samples from test bar 1 and carry out the experiment according to the heat treatment experimental method, and finally calibrate the heat treatment process of Bei Ma multiphase wear-resistant cast steel lining plate. It can be seen from the table that the inter cell heat treatment process in...
Due to the development and improvement of the output and technical level of China’s iron and steel industry, the demand and standards in the steel market are also improving, which makes some high-quality iron and steel materials come into being. Compared with other materials, iron and steel materials are...
By developing the appropriate combination of microstructure phases, cast iron can obtain the required properties in any specific application. These microstructure characteristics can be achieved by using the appropriate heat treatment of solid phase transformation. Common heat treatment processes, such as annealing, normalizing, hardening, tempering and surface treatment, can...