Preparation method of die steel material with excellent hardness and corrosion resistance
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A corrosion-resistant, die-steel technology, applied in the field of die-steel material preparation, can solve problems such as insufficient performance, and achieve the effects of enhanced hardness and corrosion resistance, good comprehensive mechanical properties, and high material uniformity
Pending Publication Date: 2022-05-17
大冶市康盛科技有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a mold with excellent hardness and corrosion resistance to solve the problem that steel balls are required to have better hardness and corrosion resistance in some current application scenarios, but the performance of existing steel materials cannot meet the above requirements. Preparation method of steel material
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Embodiment 1
[0020] A method for preparing a mold steel material with excellent hardness and corrosion resistance. The mold steel material contains the following components in weight percentage: C: 0.38%, Si: 0.25%, Mn: 0.502, P: ≤0.010%, S : ≤0.010%, Cr: 5.02%, Cu: 0.46%, Mo: 2.5%, V: 0.65%, B: 0.003%, [N]≤80ppm, [H]≤2ppm, [O]≤15ppm, balance is Fe;
[0021] The preparation method of the mold steel material comprises:
[0022] (1) The steel is heated up to 1020°C at a heating rate of 70°C / h, and kept for 5 hours, so that the steel is fully austenitized;
[0023] (2) Cool the steel to 280°C to obtain a martensitic structure;
[0024] (3) Then heat the steel to Ac1-80°C and keep it warm for 3 hours.
Embodiment 2
[0026] A method for preparing a mold steel material with excellent hardness and corrosion resistance. The mold steel material contains the following components in weight percentage: C: 0.35%, Si: 0.35%, Mn: 0.40%, P: ≤0.010%, S: ≤0.010%, Cr: 5.2%, Cu: 0.15%, Mo: 2.6%, V: 0.50%, B: 0.004%, [N] ≤ 80ppm, [H] ≤ 2ppm, [O] ≤ 15ppm, remainder The amount is Fe;
[0027] The preparation method of the mold steel material comprises:
[0028] (1) The steel is heated up to 980°C at a heating rate of 60°C / h, and kept for 6 hours, so that the steel is fully austenitized;
[0029] (2) Cool the steel to 300°C to obtain a martensitic structure;
[0030] (3) Then heat the steel to Ac1-80°C and keep it warm for 4 hours.
Embodiment 3
[0032] A method for preparing a mold steel material with excellent hardness and corrosion resistance. The mold steel material contains the following components in weight percentage: C: 0.42%, Si: 0.15%, Mn: 0.60%, P: ≤0.010%, S: ≤0.010%, Cr: 4.8%, Cu: 0.6%, Mo: 2.2%, V: 0.80%, B: 0.002%, [N] ≤ 80ppm, [H] ≤ 2ppm, [O] ≤ 15ppm, remainder The amount is Fe;
[0033] The preparation method of the mold steel material comprises:
[0034] (1) The steel is heated up to 1080°C at a heating rate of 80°C / h, and kept for 4 hours, so that the steel is fully austenitized;
[0035] (2) Cool the steel to 250°C to obtain a martensitic structure;
[0036] (3) Then heat the steel to Ac1-80°C and keep it warm for 2 hours.
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Abstract
The invention discloses a preparation method of a die steel material with excellent hardness and corrosion resistance. The die steel material comprises the following components in percentage by weight: 0.35-0.42% of C, 0.15-0.35% of Si, 0.40-0.60% of Mn, less than or equal to 0.010% of P, less than or equal to 0.010% of S, 4.8-5.2% of Cr, 0.15-0.6% of Cu, 2.2-2.6% of Mo, 0.50-0.80% of V, 0.002-0.004% of B, less than or equal to 80ppm of [N], less than or equal to 2ppm of [H], less than or equal to 15ppm of [O] and the balance of Fe. The preparation method comprises the following steps: (1) heating a steel material to 980-1080 DEG C at a heating rate of 60-80 DEG C / h, and carrying out heat preservation for 4-6 hours, so that the steel material is fully austenitized; (2) cooling the steel to 250-300 DEG C to obtain a martensite structure; and (3) heating the steel to Ac1-80 DEG C, and preserving heat for 2-4 hours to obtain the steel. The die steel material has excellent hardness and corrosion resistance, and the service life of the die steel material is greatly prolonged.
Description
technical field [0001] The invention relates to the technical field of tool and die steel materials, in particular to a method for preparing a die steel material with excellent hardness and corrosion resistance. Background technique [0002] H13 belongs to hot work die steel, which is a steel grade formed by adding alloy elements on the basis of carbon steel, and the grade is 4Cr5MoSiV1. It has good overall performance at medium temperature (600°), high hardenability (it can be hardened in air), low heat treatment deformation rate, and its performance and service life are higher than 3Cr2W8V. It can be used for die forging hammer forging die, aluminum alloy die-casting die, hot extrusion die, high-speed precision forging die and forging press die, etc. [0003] However, in some application scenarios, steel is required to have better hardness and corrosion resistance, which requires corresponding adjustments to mold steel to meet the needs of working conditions. Therefore, ...
Claims
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Application Information
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