阅读说明：本技术 不锈钢焊条及其制备方法 (Stainless steel welding rod and preparation method thereof ) 是由 吴定博 吴郁均 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种不锈钢焊条及其制备方法,不锈钢焊条含有的组分及各组分质量百分比如下：大理石5-9％；萤石1-3％；硅酸盐18-26％；钛酸盐15-25％；铁合金11-15％；铁粉15-30％；冰晶石2-4％；海藻酸钠2-4％；铁砂3-7％；总计100％。本发明不但具有双相组织,兼有奥氏体不锈钢和铁素体不锈钢的特点,而且比一般双相钢组织的不锈钢焊条具有更好的抗裂性和更好的施焊工艺性能。(The invention discloses a stainless steel welding rod and a preparation method thereof, wherein the stainless steel welding rod comprises the following components in percentage by mass: 5-9% of marble; 1-3% of fluorite; 18-26% of silicate; 15-25% of titanate; 11-15% of iron alloy; 15-30% of iron powder; 2-4% of cryolite; 2-4% of sodium alginate; 3-7% of iron sand; the total is 100%. The invention not only has the characteristics of duplex structure, austenitic stainless steel and ferritic stainless steel, but also has better crack resistance and better welding process performance compared with the stainless steel welding rod with the common duplex steel structure.)

1. The stainless steel welding rod is characterized by comprising the following components in percentage by mass:

5-9% of marble;

1-3% of fluorite;

18-26% of silicate;

15-25% of titanate;

11-15% of iron alloy;

15-30% of iron powder;

2-4% of cryolite;

2-4% of sodium alginate;

3-7% of iron sand; the total is 100%.

2. The stainless steel welding electrode according to claim 1,

the fluorite comprises the following chemical components in percentage by mass: CaF ₂≥98％，Si≤1.5％，S≤0.03％，P≤0.03％。

3. The stainless steel welding electrode according to claim 1,

in marble, CaCO ₃≥98.5％。

4. A method of making a stainless steel welding electrode as defined in any of claims 1 to 3, characterized in that the steps of the method comprise:

sieving the powder of each component respectively;

mixing the sieved components according to the corresponding mass percentage to obtain a mixture;

adding the mixture into a stirrer, adding water glass, stirring, and making into stainless steel welding rod with an oil press for producing welding rod.

Technical Field

The invention relates to a stainless steel welding rod and a preparation method thereof.

Background

At present, stainless steel welding rods are generally produced according to chemical compositions of stainless steel base materials, and the stainless steel materials have different requirements on corrosion resistance, heat resistance and the like, so that various stainless steel welding rods exist, and different stainless steel welding rods are provided for different stainless steels. A302, A307 and A312 in various stainless steel welding rods can be used for welding dissimilar steel, and the welding rods can meet the welding requirements of most dissimilar steel, but are easy to crack when welding certain high-strength steel and high-carbon steel, and cannot meet the requirements. Some welding rods in China can basically meet the crack resistance requirements of high-strength steel and high-carbon steel, but the technological properties are extremely poor, and the operation is not easy for welders.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a stainless steel welding rod which not only has a duplex structure and has the characteristics of austenitic stainless steel and ferritic stainless steel, but also has better crack resistance and better welding process performance compared with the common stainless steel welding rod with the duplex structure.

The technical scheme for solving the technical problem of the invention is as follows: a stainless steel welding rod comprises the following components in percentage by mass:

5-9% of marble;

1-3% of fluorite;

18-26% of silicate;

15-25% of titanate;

11-15% of iron alloy;

15-30% of iron powder;

2-4% of cryolite;

2-4% of sodium alginate;

3-7% of iron sand; the total is 100%.

Further, the fluorite comprises the following chemical components in percentage by mass: CaF ₂≥98％，Si≤1.5％，S≤0.03％，P≤0.03％。

Further, in marble, CaCO ₃≥98.5％。

The invention also provides a preparation method of the stainless steel welding rod, which comprises the following steps:

sieving the powder of each component respectively;

mixing the sieved components according to the corresponding mass percentage to obtain a mixture;

adding the mixture into a stirrer, adding water glass, stirring, and making into stainless steel welding rod with an oil press for producing welding rod.

After the technical scheme is adopted, the invention has the following beneficial effects:

1. the weld joint is beautiful in forming and good in slag detachability of 2. 3. The splashing is small. 4. The re-arc ignition is good. 5. The all-position weldability is good.

In order to obtain welding seams with two tissues of ferrite and austenite and good process performance, the problem of pores in the welding seams is firstly solved, the pores of stainless steel welding rods are all hydrogen pores, the problem of pores is solved by the invention from the aspects of raw materials and drying process, mineral materials in a coating generally contain a large amount of crystal water, the crystal water can be dehydrated after passing through 800-1100 ℃, the drying temperature of the welding rods does not exceed 400 ℃, so the mineral materials are subjected to water treatment before production, water glass is added in the production process of the welding rods, the produced welding rods are wet, high-temperature drying treatment is carried out, and free water in the welding rods is basically removed by controlling the temperature and time of the high-temperature drying. The reason for generating hydrogen pores is that hydrogen generated by moisture in the metallurgical reaction does not escape in time, and the problem of the pores is solved by controlling the amount of the moisture in the welding rod. Secondly, in order to obtain two structures of ferrite and austenite, a plurality of metal powders with proper proportion are added into the formula of the welding rod.

Detailed Description

The invention provides a stainless steel welding rod and a preparation method thereof, and a person skilled in the art can realize the stainless steel welding rod by properly improving process parameters by referring to the content. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the scope of the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.

A stainless steel welding rod comprises the following components in percentage by mass:

5-9% of marble;

1-3% of fluorite;

18-26% of silicate;

15-25% of titanate;

11-15% of iron alloy;

15-30% of iron powder;

2-4% of cryolite;

2-4% of sodium alginate;

3-7% of iron sand; the total is 100%.

The fluorite comprises the following chemical components in percentage by mass: CaF ₂≥98％，Si≤1.5％，S≤0.03％，P≤0.03％。

In marble, CaCO ₃≥98.5％。

A plurality of alloy elements are added to enable the welding seam structure to obtain two structures of ferrite and austenite, wherein the two structures account for 50% respectively, so that the welding seam structure has good crack resistance and good corrosion resistance.

The method of the present invention is different from other stainless steel welding rods which can basically meet the anti-cracking requirements of high-strength steel and high-carbon steel, and other welding rods are low-hydrogen coating, so the technological properties are not good, and the operation is not easy for welders. The welding rod of the invention is a rutile type coating, has excellent processing performance and is easy to operate by welders. By adjusting the formula of the powder in the welding rod, the ferrite and austenite structures are obtained, and the ideal effect is also obtained on the process performance.

The preparation method of the stainless steel welding rod comprises the following steps:

sieving the powder of each component respectively;

mixing the sieved components according to the corresponding mass percentage to obtain a mixture;

adding the mixture into a stirrer, adding water glass, stirring, and making into stainless steel welding rod with an oil press for producing welding rod.

In order that the present invention may be more clearly understood, the following detailed description of the present invention is given with reference to specific examples.