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H13 die steel and production method thereof

A production method and technology of die steel, applied in the field of die steel, can solve the problems of material segregation, long production cycle, and low yield of steel ingots, and achieve the effects of reducing production costs, compact structure, and increasing yield

Inactive Publication Date: 2019-08-09
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For H13 die steel, die casting is generally used in domestic production, the material segregation is serious, the yield of steel ingot is low, and the production cycle is long, so continuous production cannot be realized. These unfavorable factors have greatly increased the production cost of H13 die steel, which is not conducive to H13 die steel Promoted application of

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  • H13 die steel and production method thereof
  • H13 die steel and production method thereof
  • H13 die steel and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A 100-ton electric furnace is used for primary smelting, high-quality self-circulating scrap steel is used, and 84.9 tons of molten iron is added, accounting for 69.19%. The arsenic content in the molten iron is 0.010%. The electric furnace is smelted for 55 minutes, and the power supply is 10 minutes. The final carbon is 0.08%, and the final phosphorus is 0.0048%. The tapping temperature is 1638°C. 115 tons of steel are tapped from the electric furnace, 500kg of lime and 400kg of deoxidation accelerator are added during the tapping process, and alloys are added offline according to the composition. After the molten steel reaches the refining station, a total of 470kg of lime and 290kg of slagging agent are added during the power transmission process, and calcium carbide, recarburizer and silicon carbide are used for diffusion deoxidation, and 50kg of silicon carbide is used. Refining cycle 65min. Before the molten steel enters the VD station, carry out slag removal, r...

Embodiment 2

[0058] Use 100 electric furnace for smelting, add 40.7 tons of scrap steel, add 79.7 tons of molten iron, the ratio of molten iron is 66.42%, electric furnace smelting for 65 minutes, power transmission for 13 minutes, end point carbon, end point phosphorus, tapping temperature 1641 ° C, electric furnace tapping amount 117.5 tons. During the tapping process, 900kg of lime and 250kg of deoxidation accelerator are added along with the steel flow, and the alloy is mixed according to the lower limit of the composition. After the molten steel reaches the refining station, power is sent. According to the fluidity of the slag, add 200kg of lime, 450kg of slag adjustment agent, use carburant and silicon carbide for diffusion deoxidation, and use 55kg of silicon carbide. After the diffusion deoxidation is completed, add Alloy, the total refining cycle is 55min. After the molten steel is refined, carry out vacuum degassing, vacuum treatment for 22 minutes, vacuum degree ≤ 67Pa and hold ...

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Abstract

The invention belongs to the technical field of die steel and particularly relates to H13 die steel and a production method of the H13 die steel. The H13 die steel comprises chemical components including, by weight, 0.32%-0.45% of C, 0.80%-1.20% of Si, 0.20%-0.50% of Mn, 4.75%-5.50% of Cr, 1.10%-1.75 of Mo, 0.80%-1.20 of V, not larger than 0.25% of Cu, not larger than 0.25% of Ni, larger than andequal to the sum of 2.726 C and 0.183 Si and smaller than or equal to the sum of 3.283 C and 0.179 Si of the sum of Mo, Nb and Ti and the balance Fe and inevitable impurities. By the adoption of the H13 die steel and the production method, the content of harmful elements in the steel is strictly controlled, the content of inclusions in the steel is reduced through a reasonable refining process, and it is ensured that the die steel has good cleanliness; with large compression ratio rolling, the compression ratio is larger than or equal to 15, and the internal structure of an H13 rolled materialis dense; and the transverse and longitudinal unnotched impact of the steel are both larger than or equal to 280 J, and the ratio of the transverse unnotched impact energy to the longitudinal unnotched impact energy is larger than 0.8.

Description

technical field [0001] The invention belongs to the technical field of die steel, in particular, the invention relates to a H13 die steel and a production method thereof. Background technique [0002] Mold is an important basic process equipment in product manufacturing. Due to the use of molds to mass-produce parts, it has high production efficiency, high consistency, low energy consumption materials, and high precision and complexity. Therefore, it is widely used in manufacturing fields such as machinery, electronics, automobiles, information, aviation, light industry, military industry, energy, etc. The level of the mold industry has become an important symbol to measure the level of a country's manufacturing industry. Mold is the basic process equipment of industrial production, known as the "mother of industry". 75% of rough-processed industrial product parts and 50% of finished parts are formed by molds, and most of the plastic products are also formed by molds. [...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50B22D11/115C21D8/00C22C33/04
CPCB22D11/115C21D8/005C22C33/04C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 刘兵刘运丽戈文英况兴宇袁淑君梁娜赵冠夫黄涛于辉李金举王升
Owner SHANDONG IRON & STEEL CO LTD
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