Composite additive for electroslag remelted alloy tool and die steel and adding method thereof

A composite additive and electroslag remelting technology, which is applied in the field of composite additives for electroslag remelting alloy tool and die steel and its addition, can solve the problems of large oxidation burning loss of active metamorphic elements, insignificant steel metamorphism, loss of metamorphic effect, etc. , to achieve the effect of inhibiting recrystallization, eliminating segregation and inhomogeneity of structure, and inhibiting grain growth

Active Publication Date: 2011-04-20
ZHEJIANG ZHENGDA MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the traditional process, the additive (modifier) ​​is added in the ladle (steel drum), because the yield of steel slag is low (below 10%), and the metamorphic effect of steel is not obvious; Added in the slag, because it is first oxidized by the oxygen in the slag, the active metamorphic elements are greatly oxidized and burned, and lose the metamorphic effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A composite additive for electroslag remelting alloy tool and die steel, consisting of the following components in parts by weight:

[0038] 60 parts of rare earth alloy;

[0039] 1 part barium salt;

[0040] 1 part sodium salt;

[0041] Aluminum 5 parts;

[0042] Titanium 1 part;

[0043] 10 parts of silicon-calcium alloy;

[0044] Toner 1 part.

[0045] The method for adding the composite additive for the electroslag remelting alloy tool and die steel includes the following steps:

[0046] (1) The composite additive is guided by the funnel of the wire wrapping machine and evenly falls on the surface of the low-carbon mild steel strip. The steel strip with the composite additive passes through multiple cold-bending rolls of the wire wrapping machine, and gradually deforms and bends the radial deformation on both sides of the steel strip. Rolled into closed metal cored wire; mild steel strip wall thickness 0.3 mm, width 40 mm; metal cored wire inner diameter φ12 m...

Embodiment 2

[0049] A composite additive for electroslag remelting alloy tool and die steel, consisting of the following components in parts by weight:

[0050] 88 parts of rare earth alloy;

[0051] 10 parts of silicon-calcium alloy;

[0052] Aluminum 2 parts.

[0053] The method of adding the composite additive for the electroslag remelted alloy tool and die steel is the same as that in Example 1.

Embodiment 3

[0055] A composite additive for electroslag remelting alloy tool and die steel, consisting of the following components in parts by weight:

[0056] 65 parts of rare earth alloy;

[0057] 6 parts silicon-calcium alloy;

[0058] Aluminum 2 parts.

[0059] The method of adding the composite additive for the electroslag remelted alloy tool and die steel is the same as that in Example 1.

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Abstract

The invention relates to a complex additive for electroslag remelting alloy tool and die steel, and an adding method thereof. The complex additive comprises constituents by the following weight portion: 60 to 95 portions of rare earth alloys, 5 to 35 portions of silicon calcium alloys, and 2 to 5 portions of aluminum. The electroslag remelting alloy tool and die steel is treated by the complex additive, so that purity and toughness of the steel is improved, and the process service performance of materials is improved and enhanced. The adding method can prevent steel slag mixing and cinder oxidation from causing oxidation burning loss of active metamorphic elements, has high yield (more than 30 percent), and has good metamorphic effect of the steel.

Description

(1) Technical field [0001] The invention relates to a composite additive for electroslag remelting alloy tool and die steel and its adding method. (2) Background technology [0002] Electroslag remelting is a refining process widely used worldwide in the production of high-quality steel. Its importance in the production of high-quality fine steels has been proven during its decades of use in production practice. In the early stage, the process can effectively deoxidize and desulfurize, coupled with the effect of controlling solidification, the distribution characteristics of non-metallic inclusions are greatly improved. With the development and application of electroslag remelting technology, metallurgists began to realize that the most important feature of electroslag remelting process is that it can control solidification and improve the macro and microstructure of remelted steel ingots by controlling the melting rate. , which cannot be achieved by other secondary refini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/08
Inventor 吕广奇
Owner ZHEJIANG ZHENGDA MOLD
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