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High-speed steel forging process
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A high-speed steel and process technology, applied in the field of high-speed steel forging, can solve problems such as cracking and slow solidification speed, achieve the effects of reducing oxidation degree, small quenching deformation, and improving thermoplasticity
Inactive Publication Date: 2019-06-18
JIANGSU TIANGONG TOOLS CO LTD
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Problems solved by technology
However, due to its slow solidification rate, a large amount of segregation of carbon and alloying elements is formed before crystallization, thereby forming an intergranular carbide network
In order to eliminate the uneven distribution of carbides, high-temperature repeated forging or rolling is used to break and evenly distribute them. However, this forging process is easy to cause cracks, and the limitation of processing equipment and forging ratio leads to high-speed steel from the ingot. To the final product, the utilization rate of materials in the whole process is only between 24% and 36%
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Embodiment 1
[0032] A high-speed steel forging process is characterized in that: the specific steps are:
[0034] Among them, after ordinary steel scrap, pig iron, ferrochrome, ferrotungsten, ferromolybdenum, ferroniobium and metalcobalt are mixed in proportion, the components in the mixture and the parts by weight of each component are respectively: C: 3.2 parts, V: 3.0 parts, Cr: 6.0 parts, Mo: 3.0 parts, W: 3.0 parts, Nb: 1.0 parts, Co: 5.0 parts, Si: 0.9 parts, Mn: 1.4 parts, ...
Embodiment 2
[0049] A high-speed steel forging process is characterized in that: the specific steps are:
[0050] (1) Put ordinary steel scrap, pig iron, ferrochrome, ferrotungsten, ferromolybdenum, ferroniobium and metal cobalt into the vacuum induction furnace in proportion, raise the vacuum degree in the vacuum induction furnace to 1Mpa, raise the temperature to 1550°C, and keep the AC power The working frequency is 11000Hz, filled with inert gas, and refined for 20 minutes; then cooled to 1500°C, taken out of the crucible, poured into round rods, and the surface of the round rods was sanded and finished for use;
[0051] Among them, after ordinary steel scrap, pig iron, ferrochrome, ferrotungsten, ferromolybdenum, ferroniobium and metal cobalt are mixed in proportion, the components in the mixture and the parts by weight of each component are respectively: C: 1.7 parts, V: 6.0 parts, Cr: 4.0 parts, Mo: 6.0 parts, W: 1.0 parts, Nb: 5.0 parts, Co: 1.0 parts, Si: 0.8 parts, Mn: 1.3 parts,...
Embodiment 3
[0066] A high-speed steel forging process is characterized in that: the specific steps are:
[0067] (1) Put ordinary steel scrap, pig iron, ferrochrome, ferrotungsten, ferromolybdenum, ferroniobium and metal cobalt into the vacuum induction furnace in proportion, raise the vacuum degree in the vacuum induction furnace to 1.5Mpa, raise the temperature to 1530°C, and keep the AC The working frequency of the power supply is 12000Hz, and it is filled with inert gas and refined for 17 minutes; then the temperature is cooled to 1520°C, the crucible is taken out, cast into round rods, and the surface of the round rods is sanded and finished for use;
[0068] Among them, after ordinary steel scrap, pig iron, ferrochrome, ferrotungsten, ferromolybdenum, ferroniobium and metal cobalt are mixed in proportion, the components in the mixture and the parts by weight of each component are respectively: C: 2.2 parts, V: 5.0 parts, Cr: 5.0 parts, Mo: 4.0 parts, W: 2.0 parts, Nb: 3.0 parts, Co:...
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Abstract
The invention provides a high-speed steel forging process. The high-speed steel forging process specifically includes the steps that ordinary scrap steel, pig iron, chromium iron, tungsten iron, molybdenum iron, niobium iron and metallic cobalt are put into a vacuum induction furnace in proportion and poured into round bars; crystallization is conducted at the bottom of a crystallizer, and steel ingots are obtained; steel powder is formed by air-blowing through pure nitrogen; the steel powder is subjected to hot isostatic pressing treatment, and steel blocks with the uniform shapes and specifications are obtained; by vibrating tension waves, atomization is crushed, and atomized steel is obtained; the atomized steel is high-speed air-blowed into a die; and the formed high-speed steel is putinto a hot isostatic press. The high-speed steel forging process has the advantages that the macrostructure of the steel is improved, the cooling speed of an electroslag ingot is high, thus distribution of carbides in the steel is more uniform, and the improvement of the structure also improves the thermoplasticity of the high-speed steel; the high-speed steel structure is small, and the strengthand toughness of the high-speed steel are 2 times and 2.5-3 times those of smelting high-speed steel correspondingly; the strength is high, the dimensional stability of heat treatment is good, the machining performance is good, the hardness is high, and the abrasive resistance is good; and the high temperature thermal hardness is also improved by HRC1-2 than that of the smelting high-speed steel.
Description
technical field [0001] The invention relates to the technical field of high-speed steel forging, in particular to a high-speed steel forging process. Background technique [0002] High-speed steel (HSS) is a tool steel with high hardness, high wear resistance and high heat resistance, also known as high-speed tool steel or front steel, commonly known as white steel. High-speed steel was created in 1898 by F.W. Taylor and M. White of the United States. High-speed steel has good process performance, good strength and toughness, so it is mainly used to manufacture complex thin blades and impact-resistant metalcutting tools, as well as high-temperature bearings and cold extrusion dies. High-speed steel can be divided into four categories according to its preparation process: traditional casting technology, electroslag remelting technology, powdermetallurgy technology, and spray molding technology. Among them, traditional high-speed steel can be divided into ordinary high-spee...
Claims
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Application Information
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