High-carbon high-chromium cold work die steel and preparation method thereof

A technology of cold working die steel, high carbon and high chromium, applied in the direction of improving process efficiency, etc., can solve the problems of low production efficiency, complex production process, small production batch, etc., to improve production efficiency, improve purity, reduce production cost effect

Active Publication Date: 2019-03-15
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Abstract
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Problems solved by technology

[0005] The current domestic production of high-carbon chromium cold work die steel is mainly smelted by electric furnace, LF heating to adjust the composition and temperature, then vacuum treatment, then casting into steel ingots, and electroslag remelting, forging billets, and then get the required specifications of mold steel, but the production process of this method is complicated and the production efficiency is low, resulting in small production batches

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  • High-carbon high-chromium cold work die steel and preparation method thereof

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preparation example Construction

[0024] The present invention also provides a preparation method of high-carbon and high-chromium cold-working die steel, comprising the following steps:

[0025] a. Ingredients: The return material of high-carbon and high-chromium cold-working die steel is used as the raw material, and the amount of the return material is 45% to 65%. Carbon steel, scrap steel, ferromolybdenum and ferrochrome alloy are added to make the C content 1.6 ~1.9%, the Mn content is adjusted to within 0.40%, the Cr content is adjusted to 11.30~12.0%, the Si content is adjusted to 0.50~0.8%, and the P content is adjusted to less than 0.025%; The mass percentage;

[0026] b. Smelting, refining, vacuum treatment and die-casting: smelting by return oxygen blowing method, steel is tapped after smelting, refined in LF furnace, and 0.4kg / t steel is fed with CaSi wire, 0.5kg / t steel is added with rare earth after VD vacuum treatment After metamorphic treatment, stir and blow with argon gas for 20min-30min, ad...

Embodiment 1

[0042] The preparation method of high carbon high chromium cold working die steel in the present embodiment:

[0043] a. Ingredients: use high-carbon, high-chromium cold-work die steel and returned materials of similar steel types as raw materials, and the amount of returned materials is 50%, and then add carbon steel, scrap steel, ferromolybdenum and ferrochrome alloy to make the C content match to 1.8%, Mn content to 0.38%, Cr content to 11.52%, Si content to 0.60%; P content to 0.022%.

[0044] b. Smelting, refining, vacuum treatment and die-casting: After batching, the initial molten steel is smelted in the EBT furnace by returning to the oxygen blowing method. After smelting, the steel is tapped. The tapping temperature is 1620 ° C. Refining in the LF furnace, deoxidation, desulfurization, Adjust the alloy elements, after LF refining, carry out VD vacuum treatment, after VD refining, feed CaSi wire 0.4kg / t, add rare earth 0.5kg / t for modification, stir and blow with argon...

Embodiment 2

[0049] The preparation method of high carbon high chromium cold working die steel in the present embodiment:

[0050] a. Ingredients: use high-carbon, high-chromium cold-work die steel and returned materials of similar steel types as raw materials, and the amount of returned materials is 55%, and then add carbon steel, scrap steel, ferromolybdenum and ferrochrome alloy to make the C content match to 1.87%, Mn content to 0.35%, Cr content to 11.82%, Si content to 0.70%; P content to 0.024%.

[0051] b. Smelting, refining, vacuum treatment and die-casting: After batching, the initial molten steel is smelted in the EBT furnace by returning to the oxygen blowing method. After smelting, the steel is tapped. The tapping temperature is 1650 ° C. Refining in the LF furnace, deoxidation, desulfurization, Adjust the alloying elements, after LF refining, carry out VD vacuum treatment, after VD refining, feed CaSi wire 0.4kg / t, add rare earth 0.5kg / t modification treatment, stir and blow ...

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Abstract

The invention belongs to the technical field of cold work die steel production, and particularly relates to high-carbon high-chromium cold work die steel and a preparation method thereof. The high-carbon high-chromium cold work die steel and the preparation method thereof aim to solve the technical problem that an existing high-carbon high-chromium cold work die steel preparation method is small in production batch. The provided high-carbon high-chromium cold work die steel is composed of the following components of, by weight, 1.42-1.60% of C, less than or equal to 0.40% of Si, less than or equal to 0.40% of Mn, less than or equal to 0.030% of P, less than or equal to 0.015% of S, less than or equal to 0.25% of Ni, 11.00-13.00% of Cr, 0.80-1.20% of Mo, 0.70-1.10% of V, less than or equalto 1.00% of Co, and the balance Fe. The preparation method of the high-carbon high-chromium cold work die steel comprises the following steps of a, performing proportioning; b, performing smelting, refining, vacuum treatment and die casting; c, performing cogging; and d, performing post-treatment to obtain the high-carbon high-chromium cold work die steel. According to the method, batch productioncan be realized, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of cold-working die steel production, and in particular relates to a preparation method of high-carbon and high-chromium cold-working die steel. Background technique [0002] With the development of industrial technology, non-cutting and less-cutting processing techniques are widely used in domestic and foreign manufacturing, such as precision stamping, precision forging, pressure casting, cold extrusion, hot extrusion and isothermal superplastic forming. Machining. Mold has become an important molding tool. About 80% of the parts in the household appliance industry and about 70% in the electromechanical industry are formed by molds, such as plastics, rubber, ceramics, building materials, and refractory products. Most of them rely on molds. In recent years, with the rapid development of the mold industry, the development of mold steel is also extremely rapid. Die materials are basically divided into four s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/46C22C38/52C22C38/02C22C38/04C22C33/04B21C37/02C21C7/06C21C7/064C21C7/10C21C7/00C21C7/072
CPCB21C37/02C21C7/0006C21C7/0056C21C7/06C21C7/064C21C7/072C21C7/10C22C33/04C22C38/02C22C38/04C22C38/44C22C38/46C22C38/52Y02P10/20
Inventor 付建辉张健蒋世川陈琦
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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