Low-alloy high-intensity high-toughness steel and production method of low-alloy high-intensity high-toughness steel

A production method and low-alloy technology, applied in the field of metal materials, can solve problems affecting performance, plastic toughness, wear resistance, etc., and achieve the effect of simple manufacturing and processing technology
CN102605271AInactive Publication Date: 2012-07-25SANY GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SANY GRP
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses low-alloy high-intensity high-toughness steel and a production method of low-alloy high-intensity high-toughness steel. The method comprises the following work procedures of: the casting work procedure: the casting is carried out according to the following ingredients and contents to obtain low-alloy steel cast ingots: 0.15 to 0.30 weight percent of C elements, 0.30 to 0.70 weight percent of Si elements, 0.60 to 1.00 weight percent of Mn elements, 0.60 to 1.10 weight percent of Cr elements, 0.50 to 1.00 weight percent of Ni elements, 0.20 to 0.60 weight percent of Mo elements and the balance Fe and unavoidable impurities; the forging work procedure: the low-alloy steel cast ingots are forged, in addition, the blank opening forging heating temperature is 1160 DEG C to 1200 DEG C, the final forging temperature is 650 DEG C to 900 DEG C, and the deformation in each firing time is not smaller than 30 percent; and the heat treatment work procedure: the temperature of the forged and formed forgings is raised to 900 to 940 DEG C to be subjected to normalizing, the temperature is raised to 880 to 920 DEG C for carrying out quenching after the normalizing treatment, the temperature is raised to 530 to 600 DEG C for carrying out high-temperature tempering after the quenching treatment, and the low-alloy high-intensity high-toughness steel is obtained. In the embodiment of the invention, the low-alloy high-intensity high-toughness steel has high intensity and high toughness.
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Description

technical field

[0001] The invention relates to the field of metal materials, in particular to a low-alloy high-strength high-toughness steel and a production method thereof. Background technique

[0002] Due to its excellent mechanical properties and relatively low production and use costs, low-alloy steel is widely used in the field of construction machinery; currently the most used type of steel, the tensile strength is usually below 1000MPa, and its impact energy is low, it is difficult to Adapt to increasingly severe working conditions; therefore, it is necessary to further improve the plasticity and toughness of low alloy steels, especially the impact toughness at low temperature conditions, so that low alloy steels can be used at lower temperatures use.

[0003] In the prior art, a kind of strong toughness low-alloy structural steel and its production method are disclosed. The low-alloy structural steel contains alloy elements such as Cr, Ni, Mo, Cu, V, Nb, etc.; Th...

Claims

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