SJ metal welding and cutting gas, preparation method, cutting process and welding process

Abstract

The present invention relates to the technical field of C10L3 / 12, and more specifically to an SJ metal welding and cutting gas, a preparation method, a cutting process, and a welding process. The SJ metal welding and cutting gas comprises, by weight, 95-105 parts of propane, 0.001-0.005 parts of ferrocene, 0.01-0.1 parts of xylene, 0.005-0.015 parts of an anti-explosion agent, 0.01-0.1 parts of a C4-8 alcohol, and 0.01-0.05 parts of a polyol. The SJ metal welding and cutting gas of this application has a scientific formula, low cost, improved combustion performance, and strong cutting ability. It not only has a fast cutting speed, but also has high cutting quality and good welding effect. Compared with the use of acetylene gas, which has high energy consumption, high production cost, easy to cut corners, no quality guarantee, low safety factor, and great pollution to the environment, this application uses SJ metal welding and cutting gas, which avoids the problems of acetylene gas, has significant advantages, and has won unanimous praise from the expert review group. It can be used to weld copper, aluminum, and stainless steel; at the same time, it has a wide range of applications, and can be used for drilling, beveling, baking, straightening, scraping edges, underwater cutting, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of C10L3 / 12, and more particularly to an SJ metal welding and cutting gas, a preparation method, a cutting process and a welding process. Background Art

[0002] Acetylene gas is traditionally used for metal welding and cutting processes. However, acetylene gas has numerous drawbacks, including high production costs, high energy consumption, ease of cutting corners, and difficulty ensuring welding quality. Furthermore, it is highly polluting to the environment and can easily cause explosions. Currently, SJ metal welding and cutting gas has been used to replace acetylene gas, but the performance of SJ metal welding and cutting gas remains to be improved. For example, Chinese patent CN1287156A produces a metal welding and cutting gas by combining liquefied petroleum gas, gasoline, xylene, and an antioxidant and anti-glue agent. However, this welding and cutting gas suffers from low welding and cutting efficiency, low calorific value, and poor welding and cutting results. Chinese patent CN1294178A provides a high-energy metal welding and cutting gas comprising water, potassium permanganate, sodium bicarbonate, hydrogen peroxide, ferrocene, and gasoline. This metal welding and cutting gas has a complex composition, is difficult to control during construction, and exhibits significant batch-to-batch variation in welding and cutting product quality. Summary of the Invention

[0003] In response to some problems existing in the prior art, the first aspect of the present invention provides an SJ metal welding and cutting gas, which includes, by weight: 95-105 parts of propane, 0.001-0.005 parts of ferrocene, 0.01-0.1 parts of xylene, 0.005-0.015 parts of anti-explosion agent, 0.01-0.1 parts of C4-8 alcohol, and 0.01-0.05 parts of polyol.

[0004] In one embodiment, the SJ metal welding gas includes, by weight, 100 parts of propane, 0.002 parts of ferrocene, 0.05 parts of xylene, 0.01 parts of anti-explosion agent, 0.05 parts of C4-8 alcohol, and 0.03 parts of polyol.

[0005] Preferably, the anti-explosion agent is a nitrate ester, more preferably cyclohexyl nitrate.

[0006] Examples of C4-8 alcohols in the present application include butanol, pentanol, hexanol, heptanol, octanol, etc., preferably hexanol.

[0007] In one embodiment, the polyol contains an oxygen heterocycle. Preferably, the polyol is polysorbate, more preferably polysorbate 60 and / or polysorbate 80, and more preferably polysorbate 80.

[0008] The applicant unexpectedly discovered in the experiment that when the polyol contains oxygen heterocycles, especially polysorbate 80, the cutting surface is smoother, which solves the problem of local collapse during cutting. The applicant believes that the possible reason is that the long carbon chain structure and oxyethylene groups in polysorbate 80 in this application increase the adsorption capacity between the interface layers between the raw materials. At the same time, the presence of oxygen heterocycles increases the stability between the molecules, making each substance more stable under the action of propane. When the cutting process is applied, a stable flame temperature is maintained, so that the force on the cutting surface is uniform.

[0009] The second aspect of the present invention provides a method for preparing the SJ metal welding gas, comprising: filling propane into a steel cylinder, and then injecting a mixture of ferrocene, xylene, an anti-explosion agent, a C4-8 alcohol and a polyol into the steel cylinder to obtain the SJ metal welding gas.

[0010] A second aspect of the present invention provides a cutting process using SJ metal welding and cutting gas, comprising: preheating the cutting workpiece and then cutting it.

[0011] Preferably, during preheating, the substrate surface is at 1 / 3 of the length of the flame core, so that 2 / 3 of the length of the flame core is outside the substrate.

[0012] Preferably, during cutting, the flame core length is 3-5 mm, and the flame core tip is in close contact with the substrate surface.

[0013] A third aspect of the present invention provides a welding process using SJ metal welding gas, comprising: welding is performed with the distance between the flame core and the substrate being 2-6 mm.

[0014] Preferably, during welding, the welding gun is at an angle of 20-85° to the substrate. Further preferably, when the thickness of the substrate is greater than 10 cm, the welding gun is at an angle of 60-85° to the substrate. When the thickness of the substrate is less than or equal to 10 cm, the welding gun is at an angle of 20-65° to the substrate.

[0015] The undisclosed parts of the cutting process and welding process in this application can be selected by those skilled in the art. The process site diagram of the SJ metal welding gas in this application is shown in FIG. Figure 2 .

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) Ferrocene in this application has a good combustion-supporting effect;

[0018] (2) The present application adds a certain amount of anti-explosion agent, especially cyclohexyl nitrate, to SJ metal welding gas, which can significantly reduce the probability of explosion;

[0019] (3) The use of hexanol in this application improves the stability of the cutting and welding effects, making the cutting and welding quality of different batches controllable, while also making the cutting faster and the cutting surface smoother;

[0020] (4) The application uses polysorbate 80, which further improves the cutting quality. Not only is the smoothness of the cut surface improved, but there is no obvious local defect problem.

[0021] (5) When the SJ metal welding gas of the present application is used for welding, the distance between the flame core and the substrate is ensured to be 2-6 mm. At this time, cracks are avoided at the welding point and the edge position, and the welding efficiency is improved. This may be because when a higher welding temperature is maintained at this time, the impact force of the SJ metal welding gas on the substrate is minimized, which solves the current defect of the unbalanced welding temperature and impact force.

[0022] (6) The welding gun in this application is at a specific angle to the substrate, which avoids problems such as pores in the weld layer during welding;

[0023] (7) The present invention undergoes a specific preheating process and controls the length and position of the flame core during cutting, thereby reducing the amount of debris during cutting.

[0024] (8) The SJ metal welding and cutting gas of this application has a scientific formula, low cost, improved combustion performance, and strong cutting ability. It not only has a fast cutting speed, but also has high cutting quality and good welding effect. Compared with the use of acetylene gas, which has high energy consumption, high production cost, easy to cut corners, no quality guarantee, low safety factor, and great environmental pollution, this application uses SJ metal welding and cutting gas, which avoids the problems of acetylene gas and has significant advantages, and has won unanimous praise from the expert review group ( Figure 3 ), can be used to weld copper, aluminum, and stainless steel; at the same time, it has a wide range of applications, and can be used for punching, beveling, baking, straightening, edge trimming, underwater cutting, etc.; in addition, it has the advantages of simple production process, cheap and light packaging, no pollution to the atmosphere, and high safety effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the finished product drawing of SJ metal welding and cutting gas for this application;

[0026] Figure 2 Site map for using SJ metal welding and cutting gas in this application;

[0027] Figure 3 This is a photo of the expert review site. DETAILED DESCRIPTION

[0028] The present invention is described below by way of specific embodiments, but is not limited to the specific embodiments given below.

[0029] Example

[0030] Example 1

[0031] An SJ metal welding and cutting gas, specifically comprising, by weight: 95 parts of propane, 0.001 parts of ferrocene, 0.01 parts of xylene, 0.05 parts of cyclohexyl nitrate, 0.01 parts of hexanol, and 0.01 parts of polysorbate 80 (hydroxyl value 65-82 mgKOH / g, saponification value 43-55 mgKOH / g, acid value ≤2 mgKOH / g, HLB value 15, purchased from Shanghai Lianji Chemical Co., Ltd.).

[0032] The preparation method of the SJ metal welding gas is as follows: fill propane into a steel cylinder, and then inject a mixture of ferrocene, xylene, cyclohexyl nitrate, hexanol and polysorbate 80 into the steel cylinder to obtain the finished product. Figure 1 .

[0033] The SJ metal welding and cutting gas cutting process is as follows: preheat the workpiece before cutting. The workpiece is a 1.135m long, 10cm thick steel bar, and the cutting time is 8 minutes. During cutting, the flame core is 3-5mm long and the flame core tip is in close contact with the substrate surface. Oxygen consumption is 12MPa, and the oxygen working pressure is 0.05MPa. The SJ metal cutting gas has an operating pressure of 0.05-0.035MPa and an autogenous pressure of 0.3-0.15MPa. During preheating, the substrate surface is at 1 / 3 of the flame core length, with 2 / 3 of the flame core outside the substrate.

[0034] The welding process using SJ metal welding gas is as follows: the distance between the flame core and the substrate is 5 mm. During welding, the welding torch is at a 60° angle to the substrate.

[0035] Example 2

[0036] An SJ metal welding and cutting gas, specifically composed, by weight, of: 105 parts of propane, 0.005 parts of ferrocene, 0.1 parts of xylene, 0.15 parts of cyclohexyl nitrate, 0.1 parts of hexanol, and 0.05 parts of polysorbate 80 (hydroxyl value 65-82 mgKOH / g, saponification value 43-55 mgKOH / g, acid value ≤2 mgKOH / g, HLB value 15, purchased from Shanghai Lianji Chemical Co., Ltd.).

[0037] The preparation method, cutting process and welding process of SJ metal welding and cutting gas are the same as those in Example 1.

[0038] Example 3

[0039] An SJ metal welding and cutting gas, specifically comprising, by weight: 100 parts of propane, 0.002 parts of ferrocene, 0.05 parts of xylene, 0.01 parts of cyclohexyl nitrate, 0.05 parts of hexanol, and 0.03 parts of polysorbate 80 (hydroxyl value 65-82 mgKOH / g, saponification value 43-55 mgKOH / g, acid value ≤2 mgKOH / g, HLB value 15, purchased from Shanghai Lianji Chemical Co., Ltd.).

[0040] The preparation method, cutting process and welding process of SJ metal welding and cutting gas are the same as those in Example 1.

[0041] Example 4

[0042] An SJ metal welding and cutting gas is the same as that in Example 3, except that hexanol is replaced by ethanol.

[0043] Example 5

[0044] An SJ metal welding and cutting gas is the same as that in Example 3, except that it does not contain polysorbate 80.

[0045] Performance Evaluation

[0046] The SJ metal welding and cutting gas of Examples 1-5 was used for cutting respectively, and the smoothness of the cut surface was recorded and scored on a scale of 1-10. The higher the score, the smoother the cut surface. At the same time, whether there was obvious local collapse on the cut surface was recorded. The results are shown in Table 1.

[0047] Table 1

[0048] Smooth conditions Cutting surface quality Example 1 9 No visible local collapse Example 2 8 No visible local collapse Example 3 10 No visible local collapse Example 4 6 No visible local collapse Example 5 3 Local collapse visible to the naked eye

Claims

1. An SJ metal welding and cutting gas, characterized in that: By weight, it is: 100 parts of propane, 0.002 parts of ferrocene, 0.05 parts of xylene, 0.01 parts of anti-explosion agent, 0.05 parts of C4-8 alcohol, and 0.03 parts of polyol; The anti-explosion agent is cyclohexyl nitrate; The C4-8 alcohol is hexanol; The polyol is polysorbate 80.

2. A method for preparing the SJ metal welding and cutting gas according to claim 1, characterized in that: include: Fill propane into a steel cylinder, and then inject a mixture of ferrocene, xylene, an anti-explosion agent, C4-8 alcohol and polyol into the steel cylinder to obtain the product.

3. A cutting process using the SJ metal welding and cutting gas according to claim 1, characterized in that: include: Preheat the cutting piece before cutting.

4. The cutting process of SJ metal welding gas according to claim 3, characterized in that: include: During cutting, the flame core length is 3-5mm, and the flame core head is close to the substrate surface.

5. A welding process using the SJ metal welding gas according to claim 1, characterized in that: include: The distance between the flame core and the substrate is 2-6 mm for welding.

6. The welding process of SJ metal welding gas according to claim 5, characterized in that: During welding, the welding gun should be at an angle of 20-85° to the substrate.

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