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Precipitation hardening type plastic die steel and preparation method thereof

A plastic mold steel and precipitation hardening technology, applied in the field of mold steel, can solve the problems of poor corrosion resistance and low toughness of cooling holes, achieve good toughness, improve precipitation hardening hardness, and meet the needs of users.

Inactive Publication Date: 2017-07-25
CENT IRON & STEEL RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the steel has the problems of being prone to overheating, poor corrosion resistance of cooling holes, and low toughness during use.

Method used

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  • Precipitation hardening type plastic die steel and preparation method thereof
  • Precipitation hardening type plastic die steel and preparation method thereof
  • Precipitation hardening type plastic die steel and preparation method thereof

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Embodiment Construction

[0022] According to the chemical composition range designed by the present invention, 3 heats of the steel of the present invention were smelted on a 25kg vacuum induction furnace, and its specific chemical composition is as shown in Table 1. Molten steel is cast into ingots and forged to make bar. After the steel is annealed, it is processed into a sample, and undergoes solution and aging treatment (solution at 820-920°C, aging at 460-600°C). The mechanical properties at room temperature are shown in Tables 2-6.

[0023] The steel of the invention has better toughness under the premise of maintaining high hardness.

[0024] 1. Invention steel 1#, 2# and 3# have higher solid solution hardness than comparative steel 4#. (See Table 2)

[0025] 2. After solid solution at the same temperature and aging at different temperatures, the inventive steel 1#, 2#, and 3# have higher aging hardness than the comparative steel 4#. (See Table 3, Table 4)

[0026] 3. After solid solution...

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Abstract

The invention relates to precipitation hardening type plastic die steel and a preparation method thereof, and belongs to the field of die steel. The steel is specifically prepared from, by weight percent, 0.08%-0.25% of C, 0.8%-1.5% of Si, not larger than 0.030% of S, not larger than 0.030% of P, 0.4%-0.8% of Mn, 2.0%-4.0% of Ni, 0-1.5% of Mo, 1.0%-2.8% of Cr, 0.5%-1.5% of Cu, 0.5%-2.0% of Al, 0-0.2% of V and the balance Fe and inevitable impurities. Compared with the prior art, the precipitation hardening type plastic die steel has higher obdurability and corrosion resistance and is good in comprehensive performance. Through age hardening treatment, the steel can obtain higher use hardness, higher impact toughness and more excellent corrosion resistance relative to existing Ni-Cu-Al-series precipitation hardening steel, and the comprehensive performance is more excellent. Through implementation of the above technology, the material comprehensive performance can be effectively improved, and user needs can be met.

Description

technical field [0001] The invention belongs to the technical field of mold steel, and in particular relates to a precipitation-hardening plastic mold steel and a preparation method thereof, which has excellent comprehensive performance of corrosion resistance and is suitable for various plastic mold steels with high mirror polishing performance. Background technique [0002] Plastic products are now widely used as substitutes for metal products, and the amount of high-strength engineering plastics, ultra-high-strength engineering plastics, and resins added with a large amount of GF is increasing. With the rapid popularization of information technology (IT) products, plastic products used in connection with IT have increased significantly, such as manufacturing LCD screen protective films, CD, DVD digital video discs, etc. Driven by plastic products, the demand for steel for plastic molds continues to increase. Compared with the past, the current plastic products require mo...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/42C22C38/46C22C38/06C22C33/04C21D1/26C21D1/18C21D8/00C21D6/00
Inventor 马党参迟宏宵周健林鹏
Owner CENT IRON & STEEL RES INST
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