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Ultrahigh strength die steel with good corrosion resistance and toughness

An ultra-high-strength and corrosion-resistant technology, applied in the field of metallurgy, which can solve the problems of narrow material plate width, high price, and long steel plate delivery time.

Active Publication Date: 2014-08-13
威海九鼎金属制品股份有限公司
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Problems solved by technology

However, due to the long delivery period, narrow material plate width, high price and narrow specification range of the steel plate provided in the market, it cannot meet the needs of the increasingly competitive mold steel processing industry.

Method used

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  • Ultrahigh strength die steel with good corrosion resistance and toughness

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Embodiment Construction

[0016] The chemical composition (wt.%) of embodiment 1-3 invention steel

[0017] Example C Si mn Cr Ni W V Nb N co Mo O 1 0.08 0.03 0.02 12.30 5.00 0.90 0.20 0.08 0.0015 1.30 0.9 0.0012 2 0.20 0.50 0.01 10.05 8.00 1.00 0.30 0.10 0.0014 1.50 1.10 0.0011 3 0.32 0.80 0.05 11.13 10.1 1.10 0.50 0.15 0.0019 1.80 1.40 0.0014

[0018] 1) Vacuum induction furnace smelting; 2) Casting electrodes; 3) Vacuum consumable furnace remelting; 4) High temperature uniform diffusion; 5) Forging into materials; 6) Solution treatment; 7) Annealing treatment; 8) Double aging treatment The smelting steps include: smelting in an ultra-high-power electric furnace, selecting high-quality steel types, loading elements other than Cr and Ni into the crucible, preheating the crucible to 400-600°C, and evacuating to ≤ 2.7Pa, using 5 Melt at a melting rate of ~10kg / min. After complete melting, refine at a tempera...

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Abstract

An ultrahigh strength die steel with good corrosion resistance and toughness is characterized by comprising the following chemical components by weight: 0.08-0.32% of C, no more than 0.8% of Si, no more than 0.5% of Mn, 5-10% of Cr, 6.0-8.0% of Ni, 1.3-1.8% of Co, 0.9-1.1% of W, 0.2-0.5% of V, 0.08-0.15% of Nb, no more than 0.002% of N, no more than 0.0015% of O, 0.9-1.4% of Mo, 0.05-0.4% of Ti, 0.011-0.025% of S, and the balance of Fe and inevitable impurities. The die steel subjected to forging and other processing methods can be widely applied to industrial steel such as automobile steel with the requirements of high strength and toughness.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an ultra-high-strength die steel with good corrosion resistance and toughness and a manufacturing method thereof. Background technique [0002] Steel is the most widely used material among all metals. It is widely used in aviation, nuclear energy, ships, petrochemical and other industrial fields. develop. Therefore, the performance of steel is closely related to people's life safety. Currently, the development of steels for the automotive industry is mainly focused on increasing the strength of the steel while maintaining its formability. The development trend of light weight, safety and low energy consumption of automobiles puts forward higher requirements on the variety, specification and quality of steel products. The new design concept of developing lightweight and impact-resistant transportation system requires the development of materials with high strength, good plas...

Claims

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Application Information

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IPC IPC(8): C22C38/52C21D8/00
Inventor 陈海波陈爱国陈仁训陈桂兰陈冰玲陈春燕刘桂春
Owner 威海九鼎金属制品股份有限公司
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