Steel for large-sized mechanical cutlery and heat treatment process
A large-scale machinery and cutting tool technology, applied in the field of metal materials, can solve the problems that cannot meet the needs of large-scale machinery production, cannot bear strong impact, low tensile strength, etc., achieve reasonable composition ratio, improve steel strength and toughness, and improve wear resistance Effect
Inactive Publication Date: 2012-07-04
张莹
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Problems solved by technology
Although the steel of this material has good wear resistance, its tensile strength is low, only 1450Mpa, and it can only work under small impact loads, and it is difficult to withstand strong impacts and large loads. The needs of actual production under various and harsh working conditions
Method used
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[0026] The cutting tool steel is produced according to the formula and heat treatment process provided by the present invention. The specific chemical composition is listed in Table 1, and the corresponding mechanical properties are listed in Table 2.
[0027] Table 1 Chemical composition (wt%) of steel for cutting tools
[0028] Example
C
Si
mn
P
S
Cr
Mo
B
1
0.40
1.90
0.50
0.025
0.022
0.86
0.10
0.0010
2
0.25
1.50
0.25
0.030
0.029
0.45
0.08
0.0050
3
0.30
1.70
0.70
0.023
0.021
0.60
0.15
0.0005
[0029] Table 2 Mechanical properties of cutting tool steel
[0030]
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The invention provides steel for a large-sized mechanical cutlery and a heat treatment process. The steel comprises the following chemical ingredients: C, Cr and Mo alloy elements as main ingredients, and trace B element as an auxiliary ingredient. The chemical ingredient content is as follows (based on wt%): 0.25-0.40% of C, 1.50-2.00% of Si, 0.25-0.75% of Mn, not more than 0.030% of P, not more than 0.030% of S, 0.45-0.90% of Cr, 0.08-0.18% of Mo, 0.0005-0.0050% of B, and the balance of Fe and inevitable impurities. The heat treatment process comprises quenching and tempering. According to the invention, the defects of the prior art are overcome, the chemical ingredient ratio is reasonable, the heat treatment process is simple and feasible, and the comprehensive performance of the steel is excellent; and the steel not only can bear greater impact and violent collision, but also has excellent wearing performance of a wear-resistant material, and is an ideal material for manufacturing the large-sized mechanical cutlery.
Description
technical field [0001] The invention belongs to the field of metal materials, in particular to a steel for large-scale mechanical blades and a heat treatment process. Background technique [0002] In the field of industrial and agricultural production, commonly used large-scale machinery includes bulldozers, loaders, grapple machines, etc., and the blade is the main working part of the overall machinery. For example, bulldozers play an important role in land reclamation, water conservancy, mines, road construction, ports and military engineering. The blade is the front blade of the bulldozer. Under the action of strong force, it directly shovels sand, soil and other materials, and has strong friction and collision with the materials. The working environment is very harsh, and the quality of the blade material will directly affect its service life. Therefore, the requirements for the material of the blade are also quite stringent. It must not only have high strength, but als...
Claims
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Inventor 张莹
Owner 张莹