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Deoxidizer

A technology of deoxidizer and weight percentage, applied in the field of deoxidizer, can solve the problems of poor compactness of castings, achieve the effects of improved mechanical strength and anti-corrosion performance, good degassing effect, and less water leakage

Inactive Publication Date: 2010-10-27
绍兴市上虞新达精密铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a deoxidizer, which solves the problem of poor compactness of castings traditionally deoxidized by traditional deoxidizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Deoxidizer (percentage by weight): 46% of silicon, 14% of barium, 8% of calcium, 7.5% of lanthanum, 7% of aluminum, 0.10% of carbon, and the rest is iron. Mix the above-mentioned alloy fine powder in proportion, the particle size of the powder is less than 0.05mm, stir well and send it into the circular ball rolling mechanism, then add limestone accounting for 3% of the total amount of alloy fine powder, and 10% bentonite , 2% cellulose, 1% water glass as a binding agent, rolled into a ball.

[0013] Add the above-mentioned deoxidizer to the stainless steel water. After deoxidation and slag removal, pour it into the quick joint mold, shell and finish the finished joint to make a finished joint. Observe that there are no pores and obvious defects on the surface. After testing, the leakage rate is less than 2%, and the tensile strength is less than 2%. Strength 580Mpa, yield strength 260Mpa, elongation 50%.

Embodiment 2

[0015] Deoxidizer (percentage by weight): 48% silicon, 16% barium, 6% calcium, 6% lanthanum, 6% aluminum, 0.12% carbon, and the rest is iron. The preparation method is as in Example 1.

[0016] Add the above-mentioned deoxidizer to stainless steel water, after deoxidation and slag removal, pour it into the quick joint mold, shell and finish the finished joint to obtain the finished joint, observe that there are no pores and obvious defects on the surface, after testing, the water leakage ratio is less than 2%. The tensile strength is 560Mpa, the yield strength is 275Mpa, and the elongation is 52%.

Embodiment 3

[0018] Deoxidizer (percentage by weight): 47% silicon, 15% barium, 7% calcium, 6% cerium, 6.5% aluminum, 0.11% carbon, and the rest is iron. The preparation method is as in Example 1.

[0019] Add the above-mentioned deoxidizer to the stainless steel water. After deoxidation and slag removal, pour it into the quick joint mold, shell and finish the finished joint to make a finished joint. Observe that there are no pores and obvious defects on the surface. After testing, the leakage rate is less than 2%, and the tensile strength is less than 2%. The strength is 573Mpa, the yield strength is 272Mpa, and the elongation is 57%.

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Abstract

The invention discloses a deoxidizer which comprises the following components in percentage by weight: 46-48% of silicon, 14-16% of barium, 6-8% of calcium, 6-7.5% of rare earth metal, 6-7% of aluminum and balance of iron. The deoxidizer of the invention has good effect on sulphur removal, deoxidation and degasification and can be used for deoxidizing for stainless steel. The molten casting has good tissue compactness and can not leak water easily, and the mechanical strength and the corrosion resistance are greatly improved.

Description

technical field [0001] The invention relates to the technical field of investment casting, in particular to a deoxidizer. Background technique [0002] In order to improve the quality of steel, deoxidizers are often added in the steelmaking process to remove impurities and improve its mechanical properties. However, after smelting with traditional deoxidizers, the slag is difficult to remove, and the compactness of stainless steel castings is poor, which affects the quality of castings. [0003] Chinese patent 200610045916.4 discloses a molten steel deoxidizer, its chemical composition is: Si: 30~45; Al: 5~9; Ba: 12~16; Ca: 8~12; Sr: 3~5; Re: 2~ 5; the balance is Fe. Castings melted and cast with this deoxidizer have poor compactness and are prone to water leakage. Contents of the invention [0004] The invention provides a deoxidizer, which solves the problem of poor compactness of castings traditionally deoxidized by traditional deoxidizers. [0005] A deoxidizer is ...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 祖金轮
Owner 绍兴市上虞新达精密铸造有限公司
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