Metamorphic hot-work die steel

A hot work die steel, a new technology, applied in the field of hot work die steel materials, can solve the problems of unsatisfactory performance and low service life of hot work dies

Active Publication Date: 2004-12-29
JILIN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the service life of hot work dies in most countries in the world is relatively low. Therefore, improving the service life of hot work dies, reducing their manufacturing costs, and improving equipment efficiency are major problems that have been urgently resolved in the mold industry for many years. National economic significance
[0004] A lot of research and development work has been carried out in the composition design, toughening and microalloying treatment of hot work die steel at home and abroad, and some hot work die steels have been developed, as shown in Table 1, but the performance is not Very satisfactory, urgent need for further research and development of new hot work die steel

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The embodiment of the novel metamorphic hot work die steel of 19 kinds of compositions produced by the technical scheme of the present invention is shown in Table 2, as can be seen from Table 2, the novel metamorphic hot work die steel of the present invention is by weight by following main chemical composition Percent composition:

[0019] C: 0.200~0.350, Cr: 7.000~13.000, Mo: 0.800~2.000, Ni: 0.600~1.500, V: 0.300~1.200, Mn: 0.200~0.600, Si: 0.700~1.500, S≤0.040, P≤0.040, N: 0.005-0.100, Ti: 0.050-0.200, Ca: 0.001-0.050, Fe: balance.

[0020] Ce: 0.005-0.100 or Y: 0.005-0.100 or Ce: 0.005-0.100, Y: 0.005-0.100 can also be added to the above composition as composite metamorphic elements to improve the microstructure of the new metamorphic hot work die steel Improve its toughness. After metamorphism, the hardness and strength of the new metamorphic hot work die steel are slightly improved, while the impact toughness at room temperature is significantly improved.

[0...

Embodiment 2

[0025] According to the technical scheme of the present invention, a new type of modified hot work die steel without adding Y and Ce modifiers and adding Y and Ce modifiers is produced.

[0026] 1) Composition of new metamorphic hot work die steel

[0027] The composition of the weight percent of novel metamorphic hot work die steel of embodiment is as follows:

[0028] C: 0.28, Cr: 7.80, Mo: 1.02, Ni: 0.76, V: 0.83, Mn: 0.26, Si: 0.76, S≤0.04, P≤0.04, N: 0.04, Ce: 0.00~0.03, Y: 0.00~ 0.01, Ti: 0.06, Ca: 0.03.

[0029] 2) Melting and pouring of new metamorphic hot work die steel

[0030] It adopts 250Kg medium frequency induction furnace and non-oxidation steelmaking process. After pig iron and scrap steel are melted, various ferroalloys (Cr-Fe, Mo-Fe, Ni, etc.) are added, V-Fe is added before tapping, and Al is inserted at 1600-1650°C to tap, and compounding is carried out by punching in the ladle Modification, inoculation, and purification treatment, the composite modifi...

Embodiment 3

[0036] The hot working die (forging die, see accompanying drawing 1) that is used for 16 tons of double-disc friction press forging copper alloy automobile transmission synchronous ring has been manufactured by adopting the novel metamorphic hot working die steel of the present invention, and its service life is respectively longer than original use The service life of the same hot work die made of 3Cr2W8V hot work die steel or H13 hot work die steel is increased by more than 2 times or more than 8 times. See Table 6 for the comparison of their field service life.

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Abstract

The present invention relates to one kind of novel denatured hot work die steel material. The hot work die steel material consists of C 0.200-0.350 wt%, Cr 7.000-13.000 wt%, Mo 0.800-2.000 wt%, Ni 0.600-1.500 wt%, V 0.300-1.200 wt%, Mn 0.200-0.600 wt%, Si 0.700-1.500 wt%, S not more than 0.040 wt%, P not more than 0.040 wt%, N 0.005-0.100 wt%, Ti 0.050-0.200 wt%, Ca 0.001-0.050 wt%, Ce 0.000-0.100 wt% and Y 0.000-0.100 wt%, except Fe. The hot work die steel has very long service life.

Description

technical field [0001] The invention relates to a novel hot work die steel material. Background technique [0002] At present, the total output value of the mold market in the world is about 60 billion to 65 billion US dollars, and hot work die steel accounts for about 20% of the tool and die steel market. Therefore, the service life and manufacturing cost of the hot work mold determine the production efficiency of the equipment and the manufacturing cost of the product. [0003] At present, the service life of hot work dies in most countries in the world is relatively low. Therefore, improving the service life of hot work dies, reducing their manufacturing costs, and improving equipment efficiency are major problems that have been urgently resolved in the mold industry for many years. national economic significance. [0004] A lot of research and development work has been carried out in the composition design, toughening and microalloying treatment of hot work die steel a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46
Inventor 姜启川赵宇光方建儒张瑞卿隋鹤龙柏建仁赵玉谦关庆丰王金国梁宏钦夏振佳尚尔原王慧远
Owner JILIN UNIV
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