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Mixing method of high quality low phosphor and sulfur high-alloy steel

A high-alloy steel and high-quality technology, applied in the field of metallurgical industry, can solve the problems of phosphorus, five harmful elements, and trace harmful elements that cannot be controlled

Active Publication Date: 2008-12-24
DAYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of this invention is to solve the problem that phosphorus, five harmful elements and trace harmful elements cannot be controlled in the production of high-alloy steel by four commonly used smelting methods at present, and provide a high-quality low-phosphorus-sulfur high-alloy steel mixing method

Method used

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  • Mixing method of high quality low phosphor and sulfur high-alloy steel
  • Mixing method of high quality low phosphor and sulfur high-alloy steel

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Experimental program
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Effect test

Embodiment Construction

[0030] Adopt the present invention to produce H13 steel pipe mandrel electroslag steel, its technological operation procedure is as follows:

[0031] One furnace is planned to be smelted, and the technical standard shall be GB1299-2000. Two trays for pouring, one tray for 3t×4 steel ingots. The remaining molten steel is poured into 1.2t electrode rods.

[0032] 1. Chemical Composition (%)

[0033] The user's requirements for the basic composition of the finished product (%):

[0034] grade

C

mn

Si

P+S

S

Cr

Mo

V

4Cr5MoSiV1

(electroslag)

0.30

0.39

≤

0.60

0.70

1.20

≤

0.020

≤

0.008

4.50

5.50

1.00

1.50

0.78

1.20

GB1299-2000

0.32

0.45

0.20

0.50

0.80

1.20

P≤

0.030

≤

0.030

4.75

5.50

1.10

1.75

0.80

1.20

...

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Abstract

The invention provides a mixing mix method for high alloy steel with high quality and low phosphorus and sulfur. In the invention, iron water or pig iron smelted from a blast furnace is put in an electric furnace or a revolving furnace for smelting by the continuous oxidation method; in particular, at the same time, an iron alloy or return materials are put in another induction furnace or electric furnace for smelting by the continuous loading method; and the iron water smelted by the electric furnace or the revolving furnace and the iron alloy smelted by the induction furnace or the electric furnace are mixed in a molten steel container for external furnace refining and ingot mold casting. The mixing method of the invention has the advantages of simpleness, standard, low cost, and capability of continuous refining the high alloy steel with high quality and the alloy ratio of more than 5 percent, completely solves the problems of uncontrollable phosphorus, five-harmful elements and harmful microelements in steel in the production of the high alloy steel by the prior smelting method; therefore, the mixing method is particularly suitable for the smelting of mould steel, nonrust heat resisting steel, rotor steel, valve steel, high-speed tool steel, high temperature alloy, etc.

Description

(1) Technical field: [0001] The invention relates to the metallurgical industry, and relates to a mixing method for high-quality low-phosphorus-sulfur high-alloy steel. (two) background technology: [0002] High-alloy steel mainly refers to tool and die steel, stainless steel, heat-resistant steel, blade steel, valve steel, high-speed tool steel, high-temperature alloy and its new products, etc. The smelting of these steels, alloys or their electroslag base metals usually adopts the following four methods: [0003] The first method: non-vacuum induction furnace or vacuum induction furnace. [0004] The second method: non-vacuum induction furnace or vacuum induction furnace + refining outside the furnace (LF, VD, VOD, RH are collectively referred to as ladle refining furnaces, and its operation is called secondary smelting or ladle refining; LF: Argon gas is blown at the bottom of the ladle during refining , the upper part is heated by a three-phase electrode; VD: Argon gas...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21B5/00C21C7/04
Inventor 文武柳学胜陈长西刘文德
Owner DAYE SPECIAL STEEL CO LTD
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