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A kind of high uniformity and high polishing type plastic mold steel ZW636 and preparation method thereof

A technology of plastic mold steel, ZW636, which is applied in the field of steel forging and heat treatment, can solve the problems of increasing the production difficulty of plastic mold steel, and achieve the effect of improving comprehensive service performance, improving grain size level and uniform composition.

Active Publication Date: 2020-04-10
唐山志威科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the trend of large-scale molds also increases the difficulty of producing plastic mold steel

Method used

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  • A kind of high uniformity and high polishing type plastic mold steel ZW636 and preparation method thereof
  • A kind of high uniformity and high polishing type plastic mold steel ZW636 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The module size is 320*1310*4200mm.

[0034] Electroslag ingot shape: φ1100mm, ingot weight 19.6t.

[0035] The ingredients are as follows:

[0036] Example C Si mn P S Cr Ni Mo V 1 0.27 0.21 1.45 0.009 0.001 1.45 1.01 0.42 0.1

[0037] The specific implementation steps are as follows:

[0038] (I) Electrode blank softening annealing: according to the composition content in the above table, the electrode blank is obtained by smelting and continuous casting of die steel. The electrode blank is preheated at 350°C, heated to 740°C at full speed, and kept for 8h, at a rate of ≤40°C / h The furnace is cooled to 300°C and released.

[0039](II) Protective atmosphere electroslag remelting: after annealing, the electrode blanks are polished, and the polished electrode blanks are welded 7 pieces before smelting for 6 hours, and the slag used is baked at 700 ° C for 8 hours in advance When preparing the crystallizer tooling, it is necessa...

Embodiment 2

[0054] The module size is 460*1310*4200mm.

[0055] Electroslag ingot shape: φ1100mm, ingot weight 19.6t.

[0056] The ingredients are as follows,

[0057] Example C Si mn P S Cr Ni Mo Nb 2 0.27 0.20 1.47 0.010 0.001 1.46 1.02 0.48 0.1

[0058] The specific implementation steps are as follows:

[0059] (I) Electrode blank softening annealing: according to the composition content in the above table, the electrode blank is obtained by smelting and continuous casting of die steel. The electrode blank is preheated at 350°C, heated to 740°C at full speed, and kept for 8h, at a rate of ≤40°C / h The furnace is cooled to 300°C and released.

[0060] (II) Protective atmosphere electroslag remelting: after annealing, the electrode blanks are polished, and the polished electrode blanks are welded 7 pieces before smelting for 6 hours, and the slag used is baked at 700 ° C for 8 hours in advance When preparing the crystallizer tooling, it is nece...

Embodiment 3

[0075] The module size is 600*1400*2200mm.

[0076] Electroslag ingot shape: φ1100mm, ingot weight 19.6t.

[0077] The ingredients are as follows:

[0078] Example C Si mn P S Cr Ni Mo V 3 0.27 0.19 1.46 0.009 0.002 1.46 1.03 0.55 0.1

[0079] The specific implementation steps are as follows:

[0080] (1) Converter smelting: Calculate the ratio of raw materials according to the composition content in the above table as the final content of mold steel, add high-clean steel scrap and molten iron into the converter, blow oxygen for 13 minutes, and use high-strength supplementary blowing operation to ensure the carbon content at the end of the converter At the same time as reducing the oxygen content in the molten steel, the smelting end point temperature is 1630°C. After sampling and testing the carbon and phosphorus content, the steel is tapped. It is lime and refining slag) and alloyed, and then refining in LF furnace.

[0081] (2) LF...

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Abstract

The invention relates to high-uniformity and high-polishing type plastic mould steel ZW636 and a preparation method thereof. The plastic mould steel particularly comprises the following components inpercentage by mass: 0.20 to 0.30 percent of C, 0.10 to 0.40 percent of Si, 1.20 to 1.60 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.005 percent, 1.20 to 1.80 percent of Cr, 0.90 to 1.20 percent of Ni, 0.48 to 0.70 percent of Mo, 0.08 to 0.15 percent of V, 0.015 to 0.030 percent of Als, less than or equal to 0.25 percent of Cu, O of less than or equal to 12 ppm,N of 60 to 100 ppm, H of less than or equal to 1.5 ppm and the balance of Fe and unavoidable impurities. Through the specific preparation method, the plastic mould steel has the following characteristics: (1) the tissue is uniform, the grain crystal is small, the tissue rating is less than or equal to level 4, and the grain size is more than level 6; (2) the hardness is uniform and the hardness uniformity of the same section is less than or equal to 3 HRC; and (3) the high-uniformity and high-polishing type plastic mould steel ZW636 has high polishing property and can be polished to 8000 meshes, and the polishing rate is 95 percent.

Description

technical field [0001] The invention belongs to the field of steel forging and heat treatment, and in particular relates to a high-uniformity and high-polishing plastic mold steel ZW636 and a preparation method thereof. Background technique [0002] Plastic mold steel is mainly used in molds for home appliances, automobiles, and medical equipment. With the improvement of the quality of life, consumers' requirements for the appearance of home appliances and automobiles are also constantly improving, especially for high-mirror molds, and the market demand continues to increase. The high-mirror mold requires that the material must have high purity and high hardness uniformity to ensure that its polishing performance meets the high requirements for the appearance of plastic products. In addition, the trend of large-scale molds has also increased the difficulty of producing plastic mold steel. Contents of the invention [0003] The invention proposes a high-uniformity and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C22C38/42C22C38/58C22B9/18C21D8/00C21D1/18C21D1/26C21C7/06C21C7/10
CPCC21C7/06C21C7/10C21D1/18C21D1/26C21D8/005C22B9/18C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/58
Inventor 曹立军王建华刘道献赵伟东宋文建蒋大鹏崔瑞婷张长春陈海桐邵智勇刘海坤潘成明
Owner 唐山志威科技有限公司
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