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Sulfur alloying method for high-sulfur free-cutting stainless steel for ballpoint pen smelting in three-phase lined electroslag furnace

A ballpoint pen tip and easy cutting technology, which is applied in the field of metal alloys, can solve problems such as inaccurate control of sulfur content, easy splashing of ferrous sulfide, and difficulty in deoxidation, so as to avoid adverse effects, facilitate precise control, and solve difficult deoxidation effects.

Active Publication Date: 2020-08-11
BEIJING SHOUGANG GITANE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a sulfur alloying method for high-sulfur free-cutting stainless steel used in smelting ball-point pen heads in a three-phase lined electroslag furnace, which solves the inaccurate control of sulfur content, easy splashing of ferrous sulfide, and deoxidation in the prior art Difficulty and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a method for sulfur alloying of high-sulfur free-cutting stainless steel used for smelting ballpoint pen heads in a three-phase lined electroslag furnace, the steps comprising:

[0039] S1. Before smelting high-sulfur free-cutting stainless steel, smelt a furnace of stainless steel similar to free-cutting steel in a three-phase lined electroslag furnace. The mass ratio of the first slag used is CaO:Al 2 o 3 :CaF 2 =50%: 25%: 25%, after tapping, 50% of the gained refining slag quality is returned to the three-phase lined electroslag furnace, and new slag equivalent to 50% of the total slag quality is replenished in the steelmaking furnace. The proportion of new slag is Al 2 o 3 :CaF 2 =50%:50%.

[0040] S2. In the three-phase lined electroslag furnace, the alloy steel ingot of high-sulfur free-cutting stainless steel is added to smelt. After the various metal small pieces in the furnace are melted, the strong deoxidation starts. When the steel...

Embodiment 2

[0051] This embodiment provides a method for sulfur alloying of high-sulfur free-cutting stainless steel used for smelting ballpoint pen heads in a three-phase lined electroslag furnace, the steps comprising:

[0052] S1. Before smelting high-sulfur free-cutting stainless steel, smelt a furnace of stainless steel similar to free-cutting steel in a three-phase lined electroslag furnace. The mass ratio of the first slag used is CaO:Al 2 o 3 :CaF 2 =45%: 30%: 30%, after tapping, 45% of the gained refining slag quality is returned to the three-phase lined electroslag furnace, and new slag equivalent to 55% of the total slag quality is supplemented in the steelmaking furnace. The proportion of new slag is Al 2 o 3 :CaF 2 =45%:55%.

[0053] S2. Add high-sulfur free-cutting stainless steel alloy raw materials into the three-phase lined electroslag furnace for smelting. After the small pieces of metal in the furnace are melted, strong deoxidation will begin. 15 minutes before the...

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Abstract

The invention discloses a sulfur alloying method for smelting high-sulfur easy-cutting stainless steel for a ballpoint head through a three-phase lining electroslag furnace. The method comprises the following steps that before the high-sulfur easy-cutting stainless steel is smelted, the furnace is firstly washed; after the steel is tapped, part of the slag used for tapping the steel is returned tothe steel smelting furnace; new slag is added in the steel smelting furnace; alloy steel ingots of the high-sulfur easy-cutting stainless steel are added for smelting; after part of the slag is removed in the smelting process, equal-weight molten slag is added to complete the slag replacement; after the slag is replaced, ferrous sulfide is added into the furnace, the rapid stirring is carried out, and the slag in the furnace is kept at a high temperature through the electric heating; and meanwhile, the combined deoxidation is carried out, the steel is tapped after the combined deoxidation iscompleted, tellurium is added in the steel tapping process, so that the high-sulfur easy-cutting stainless steel is obtained. In the preparation process of the high-sulfur easy-cutting stainless steel, the ferrous sulfide is not easy to splash, the deoxidation is easy to carry out, and the accurate control of the sulfur content and the oxygen content of alloy elements can be achieved.

Description

technical field [0001] The invention relates to a sulfur alloying method for high-sulfur free-cutting stainless steel used for smelting ball-point pen heads in a three-phase lined electroslag furnace, belonging to the technical field of metal alloys. Background technique [0002] The three-phase lined electroslag furnace is an alloy refining furnace with a basic lining. Because its working principle is to let the pure iron electrode lead the current into the basic slag with a certain resistance, the Joule heat emitted by the slag is used as the heat source for steelmaking. Its slag mainly uses CaO+Al 2 o 3 +CaO ternary slag system, the slag basicity is relatively high. High basicity is unfavorable for sulfur (S) alloying, which requires low basicity or even acidic slag. [0003] Chinese Patent No. ZL201611228313.8, patent name "free-cutting alloy, alloy wire, its preparation method, pen head, pen core and pen", pointed out that 30-50% of the slag was poured out during sme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22B9/18C22C38/60
CPCC22B9/18C22C33/04C22C38/60
Inventor 李刚陶科尤同吉
Owner BEIJING SHOUGANG GITANE NEW MATERIALS