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Advanced mirror gum die steel and manufacturing process thereof

A manufacturing process and die steel technology, applied in the field of high-grade mirror gum die steel and its manufacturing process, can solve the problems of affecting the service life of die steel, insufficient wear resistance, etc., and achieve high compactness, improved oxidation resistance, and structural strength. high effect

Pending Publication Date: 2021-09-07
RUGAO HONGMAO HEAVY FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the rubber mold steels used in my country are 3Cr2Mo or 3Cr2MnNiMo plastic mold steels, but the mirror surface formed by 3Cr2Mo mold steel and 3Cr2MnNiMo mold steel is relatively insufficient in wear resistance, which is easy to affect the service life of the mold steel

Method used

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  • Advanced mirror gum die steel and manufacturing process thereof
  • Advanced mirror gum die steel and manufacturing process thereof
  • Advanced mirror gum die steel and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0039] Material smelting: batching according to the ratio of the ingredients in Table 1, after smelting in a vacuum induction furnace at 1600°C, pouring to form steel ingots, the pouring temperature is 1450°C;

[0040] High-temperature homogenization treatment: heat the steel ingot to 1180°C, keep it at this temperature for 10 hours, and air-cool to room temperature to obtain a homogenized steel ingot;

[0041] Forging: The steel ingots treated with high temperature homogenization are subjected to Guoxiang forging process. The starting forging temperature is 1130°C, the final forging temperature is 900°C, after forging, the fog is cooled to 470°C, and the temperature in the furnace is 470°C. After holding at ℃ for 3 hours, cool to room temperature with the furnace to obtain forgings;

[0042] Annealing treatment: heat the forging to 880°C, hold for 3 hours, then cool to 610°C with the furnace, and then air cool to room temperature to obtain annealed forging;

[0043] Quenchin...

Embodiment 4-8

[0046] The difference from Example 2 is that in the step of material smelting, the copper powder and scandium powder obtained according to the ratio in Table 1 are added, and after being smelted in a vacuum induction furnace at 1600°C, the steel ingot is casted at a pouring temperature of 1450°C;

[0047] After the quenching and tempering treatment step, a nitriding treatment step is provided before the tempering treatment step.

[0048]Nitriding treatment: Put the quenched and tempered mold into the nitriding furnace, and directly feed ammonia gas to make the atmosphere in the furnace a pure ammonia gas atmosphere. After 3 hours, cool down to room temperature with the furnace to obtain nitriding die steel.

Embodiment 9

[0050] The difference with embodiment 8 is: the quenched and tempered mold is put into the nitriding furnace, and ammonia gas is directly passed into, so that the atmosphere in the furnace is a pure ammonia gas atmosphere, and the air pressure in the nitriding furnace is 1500Pa, and the temperature in the nitriding furnace is raised to After holding at 460°C for 3 hours, then raising the temperature at 0.5°C / min to 485°C and holding for 3 hours, then cooling to room temperature with the furnace to obtain nitriding die steel.

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Abstract

The invention relates to the technical field of die steel manufacturing, and particularly discloses advanced mirror gum die steel. The advanced mirror gum die steel is prepared from the following raw materials of, in percentage by mass, 0.35% to 0.65% of carbon, 0.20% to 0.80% of silicon, 0.30% to 0.50% of manganese, 1.60% to 2.40% of chromium, 0.35% to 0.70% of molybdenum, 0.40% to 0.80% of aluminum, 0.10% to 0.30% of niobium, less than 0.02% of sulfur and the balance iron, and the preparation method comprises the following steps of material smelting, high-temperature homogenization treatment, forging, annealing treatment, thermal refining and tempering treatment. The advanced mirror gum die steel can be used for extrusion forming of gum objects and has the advantage of being high in wear resistance.

Description

technical field [0001] This application relates to the technical field of mold steel manufacturing, more specifically, it relates to a high-grade mirror-finished gum mold steel and its manufacturing process Background technique [0002] Gum mold steel is a type of mold steel that is used for mass production of gum finished objects. The quality of the mold directly affects the quality of the pressure processing process, the precision output of the finished rubber object, and the production cost. Therefore, the mold steel needs to have high hardness to ensure that the mold steel will not be deformed during use and affect the product. accuracy. [0003] Additionally, to enhance the finish of the gum-finished object, mirror-finish tool steel is required. At present, most of the rubber mold steels used in our country are 3Cr2Mo or 3Cr2MnNiMo plastic mold steels, but the mirror surface of 3Cr2Mo mold steel and 3Cr2MnNiMo mold steel is relatively insufficient in wear resistance, ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/06C22C38/26C22C38/20C22C33/04C21D8/00C21D6/00C21D1/26C21D1/25C23C8/26C23F17/00B21J5/00
CPCC22C38/02C22C38/04C22C38/22C22C38/06C22C38/26C22C38/20C22C38/005C22C38/002C22C33/04C21D8/005C21D6/002C21D6/005C21D6/008C21D1/26C21D1/25C23C8/26C23F17/00B21J5/002
Inventor 周青春徐卫明顾金才葛建辉赵博伟吴俊亮马胜
Owner RUGAO HONGMAO HEAVY FORGING
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