The formation and development of trolley annealing furnace plays a key role in people's development. In the Shang Dynasty, China exhibited relatively sound copper smelting furnaces with temperature control reaching 1200 C and nominal diameter of 0.8 M. During the Spring and Autumn Period, we deepened our grasp of the technology of developing temperature control in copper smelting furnace, and then produced pig iron.
In 1794, the cylindrical Cupola for pig iron smelting was exhibited all over the world. Later, in 1864, George, an American, applied the basic principle of Siemens PLC heat storage furnace to create the first iron-making blast furnace heated by gas fuel. He used the heat storage chamber to heat the gas and liquefied gas at high temperature, thus ensuring the temperature of about 1600 C needed for ironmaking. Around 1900, the supply of electromagnetic energy was gradually sufficient. Various resistance furnaces, electric arc furnaces and cored induction furnaces were just beginning to be used.
In the 1950s, coreless induction furnace developed rapidly. Then the electron beam furnace was demonstrated, which used the electron beam to impact the solid-state hard disk stock, which could strengthen the surface warming and melt the raw materials with high melting point. The first hand forging furnace used by Dala Return Device Manufacturer for forging heating was the hand forging furnace. Its working room space was a concave groove. The groove body was filled with coal carbon. The gas for incineration treatment was supplied from the lower part of the groove, and the steel parts were buried in the coal for heating. This kind of furnace has very low heat efficiency and poor heating quality, and only small and medium steel parts are heated, and then a closed or fully closed chamber furnace built with corundum bricks and related refractory bricks can be carried out. Coal, liquefied gas or oil can be used as raw materials, electricity can also be used as pyrogen, and steel parts can be added into the furnace. Wen.
In order to facilitate the heating of large and medium-sized steel parts, the trolley type furnace suitable for heating ingots and billets is also displayed, so that the heating of long-shaped components also shows the well type furnace. After the 20th century, various kinds of specialized and active furnaces which can develop furnace productivity and improve workers'standards have been discovered.
The natural materials of trolley-type annealing furnace also follow the development of natural material resources design and technical development of natural material conversion. The solid fuels such as lump coal, coke and pulverized coal are gradually replaced by gases and liquid fuels such as producer gas, liquefied gas of big cities, gas, diesel engine and light fuel oil, and the common natural materials are developed. Consistent with various incineration treatment machinery and equipment.
The structure of trolley type annealing furnace, heating technicality, temperature control and atmosphere inside the furnace are all immediately harmful to the quality of products after production and processing. In forging hot blast stove, the development of heating temperature of metal materials can reduce the deformation friction resistance, but too high temperature causes crystal growth, air oxidation or overheating, which can not optimistically endanger the quality of steel parts. During the whole process of quenching and tempering, if the steel is heated to a point about the critical temperature and then suddenly cooled by water, the strength and compressive strength of the steel can be developed; if the steel is heated to a point below the critical temperature and then cooled by slow water, the strength of the steel can be reduced and the ductility can be developed.