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Process for preparing composite cutter casting steel ingot and composite steel

A technology of composite steel and cutting tool, applied in the field of composite casting steel ingot and composite steel preparation, can solve the problem of not being able to maintain sharpness, and achieve the effects of low cost, stable bonding weight and significant economic benefits

Inactive Publication Date: 2006-02-22
上海泛屹复合钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compounded steel can not only maintain the sharpness and hardness of the high-carbon edge steel, but also reflect the grindability of the low-carbon steel of the body, which can better solve the defect that the knives and scissors cannot maintain sharpness after use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Make a steel core with the grade 65Mn that meets the design requirements, and perform surface treatment, preheat it to 400-500 °C, and place it in the steel mold for positioning with a positioning device;

[0017] (2) Cast the molten Q235 material into the steel mold, make it compound with the steel core 65Mn, and form a 1mm fusion interface between the molten steel and the surface of the steel core, the casting temperature is 1550°C, the time for calming and casting (one furnace of 20T molten steel) After 10-20 minutes, after the casting feeding is completed, the insulation cover should be covered immediately for heat preservation and slow cooling treatment. When the temperature is below 500°C, the cover can be removed and demoulded;

[0018] (3) Heat the composite steel ingot obtained in step (2) in a heating furnace for 4 to 5 hours, the furnace temperature is 1250°C, the steel temperature is 1150°C, and the steel ingot is rolled on a rolling mill to make billets ...

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Abstract

The preparation process of composite steel for cutter includes the following steps: preheating the steel core for edge and positioning inside steel mold; pouring molten body steel into steel mold for combination with the steel core; and rolling the composite steel ingot at high temperature and high pressure to form shaped material via further fusion, with the cross section compression ratio being 60-200. The said technological process is suitable for mass production, and has short production period, low cost, high material utilization and other advantages.

Description

technical field [0001] The invention relates to a preparation method of composite steel, in particular to a preparation method of composite cast steel ingot and composite steel used for cutting tools. Background technique [0002] Clad steel is a basic raw material used in the knife and scissors industry. At present, there are two production methods for manufacturing composite steel at home and abroad, one is the explosive forming method, and the other is the rolling composite method. The characteristics of these two methods: Explosive forming is mainly used in military industry, major national engineering projects, the cost is extremely high, and it is not suitable for civil and general industrial products; The efficiency is not ideal, and the cost is also high. Contents of the invention [0003] The technical problem to be solved in the present invention discloses a preparation method of composite steel for cutting tools, so as to overcome the defects of unstable bondi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B22D7/02
Inventor 范广益
Owner 上海泛屹复合钢有限公司
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