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Production process of low carbon, high silicon, aluminum and copper plastic mold steel

A technology for plastic molds and production processes, applied in the direction of improving process efficiency, can solve the problems of excessive carbon, improper refining process control, and high smelting costs, and achieve the effects of saving alloy costs, saving refining time, and low H content

Active Publication Date: 2020-05-01
HENAN ZHONGYUAN SPECIAL STEEL EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production of this kind of process route usually leads to improper control of the refining process, resulting in carbon out-of-tolerance, and the use of electrolytic metal manganese, micro-carbon ferrochrome and other precious alloys, resulting in high smelting costs

Method used

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  • Production process of low carbon, high silicon, aluminum and copper plastic mold steel
  • Production process of low carbon, high silicon, aluminum and copper plastic mold steel
  • Production process of low carbon, high silicon, aluminum and copper plastic mold steel

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Embodiment 1

[0019] Embodiment 1: a kind of production technology of low-carbon, high-silicon aluminum-containing copper-containing plastic mold steel, concrete steps are as follows:

[0020] Step 1) The induction charge includes Ni3 steel scrap or steel shavings, 1.4122 steel scrap or steel 304L scrap (amount ≤ 10%), 17-4PH steel or 15-5PH scrap steel (amount ≤ 10%) ), 21CrMo10 steel chips or steel shavings, the surface of the chips is required to be clean and free of oil, and the spectra of the chips should be checked one by one before use to confirm the main element composition.

[0021] Step 2) Before feeding the induction furnace, put about 15-30Kg of lime into the bottom of the furnace. The lime should be selected to ensure that there are no carbon blocks or sundries. It is not allowed to place the furnace horizontally or obliquely, and the charge should be full and full. After the feeding is completed, start to send electricity. Add about 90-120kg of lime in time during the power ...

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Abstract

The invention belongs to the technical field of special steel melting, and particularly relates to a production process of low-carbon, high-silicon and aluminum and copper contained plastic mould steel. According to the melting technology, an alloy steel material end containing nickel, copper, chromium and molybdenum and steel cuttings serve as raw materials, through process flows of induction furnace operation, refining, vacuum oxygen blowing refining, refining, VD degassing and mold casting, a low-carbon low-gas-component proper electrode blank is obtained, and the electroslag production needs are met.

Description

technical field [0001] The invention belongs to the technical field of special steel smelting, and specifically relates to a production process of low-carbon, high-silicon, aluminum-containing and copper-containing plastic mold steel. Background technique [0002] NAK85 is a low-carbon, high-silicon, aluminum-containing and copper-containing plastic mold steel, which is generally used in mirror polishing moulds, dust-proof, TV filter plates, cosmetic boxes, precision wrinkle processing molds, office automation equipment, electric discharge machining molds for auto parts, etc. aspect. The chemical composition is as follows: [0003] Table 1. NAK85 chemical composition [0004] [0005] Because of its strict requirement for hydrogen ≤ 2.0ppm. At present, the smelting method used in China is usually smelting low-carbon and low-phosphorus molten steel in EBT electric arc furnace, and then producing electrode blanks through LF refining, VD vacuum refining, die casting, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/42C22C38/06C22C33/06C21C7/10C21C7/06
CPCC21C7/06C21C7/10C22C33/06C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44Y02P10/20
Inventor 鹿盟祁跃峰赵鹏雷冲金会业程晃
Owner HENAN ZHONGYUAN SPECIAL STEEL EQUIP MFG CO LTD