JPS6126695A - Lubricating composition for both rust prevention and metal working - Google Patents

Abstract

PURPOSE:A novel lubricating composition, obtained by incorporating a hydrocarbon having a specific viscosity, a specific wax and rust preventing agent in a specific proportion, and having temporary rust preventing property of hot rolled steel plates, cold rolled steel plates, surface treated steel plates, etc. and lubricity, degreasing property in press working, etc. CONSTITUTION:A lubricating composition consisting of (A) 70-97wt% hydrocarbon adjusted to 0.3-10cSt, preferably 1-10cSt viscosity at 40 deg.C, (B) 2-10wt% wax having 40-80 deg.C melting point and (C) 1-20wt% rust preventing agent. Preferred examples of the component (A) include a hydrocarbon obtained by incorporating a light hydrocarbon having 100-310 deg.C boiling point, 3-150 deg.C flash point and 0.3-5cSt viscosity at 40 deg.C with a heavy hydrocarbon having >=250 deg.C boiling point and >=25cSt viscosity at 40 deg.C in an amount of 2-20wt%. EFFECT:Roll slip or film damage is not caused in coiling immediately after coating the oil.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to a lubricating composition used during processing of metal materials;
More specifically, it combines the temporary rust prevention properties of hot-rolled steel sheets, cold-rolled steel sheets, 9 surface-treated steel sheets, etc., as well as lubricity and degreasing properties during subsequent metal processing, such as press working, and prevents roll slips during coiling immediately after oiling. This invention relates to a novel lubricating composition that does not cause paint film damage.

[Technical Background of the Invention and Problems Therein] Conventionally, hot-rolled steel sheets, cold-rolled steel sheets, and surface-treated steel sheets to be subjected to press working, for example, have been coated with rust-preventing lubricating oil before being supplied to processing companies. However, these rust-preventing lubricants do not have sufficient resistance to rusting, and galling occurs on the surface of the steel plate, especially when drawing pressure is applied. Therefore,
In reality, processing companies apply a highly viscous lubricating oil with high lubricity prior to processing, and then perform predetermined processing.

Since this oiling work is usually done manually, it reduces the productivity of the entire loading process, causes a deterioration of the working environment, and further leads to problems such as poor degreasing and oil stains after processing.

As a way to solve such problems, in order to improve productivity by omitting the oil application work during processing, a rust-preventing oil with lubricating properties is applied to the steel plates to be shipped. It has been proposed to form a resin or wax coating on the surface of a steel plate that has lubricity, rust prevention, and degreasing properties (Japanese Unexamined Patent Publication No. 50-1041 (No.
(See Japanese Patent Publication No. 37882 and Japanese Patent Publication No. 5B-21784).

However, since lubricity, rust prevention, and degreasing properties are all contradictory properties, it is extremely difficult to form a resin film that satisfies all of these properties. For example, in the case of coiled materials, there are many problems such as damage, peeling, and scratching of the coating film during coiling, as well as problems such as roll slip.

For this reason, additional rust-preventing oil is being applied to the surface. Therefore, it is necessary to improve and expand various equipment in the coating line. Furthermore, recently, high-strength steel sheets and galvanized steel sheets have been increasing, and when processing them, it is necessary to simplify the treatment process (for example, use the current anti-corrosion oil coating line as is) and to use a single treatment oil. There is an increasing demand for the following, and it is desired to develop a lubricating composition that can meet these demands.

[Objective of the Invention 1 The present invention is effective in meeting the above-mentioned needs, and is
In particular, we provide a rust-preventing and metal-working lubricating composition that has excellent lubricity, rust prevention, and degreasing properties during drawing processing, and can be applied and coiled without trouble on current rust-prevention oil coating lines. With the goal.

[Summary of the Invention] The rust preventive and metal processing lubricating composition of the present invention has a viscosity of 0.3 to 10 centistokes (Cst) at 40"0.
70 to 97% by weight of hydrocarbons adjusted to
2 to 10% by weight of waxes at 80°C and 1 to 20% of rust inhibitor
% by weight.

The first essential component in the composition of the present invention is a hydrocarbon whose viscosity at 40° C. is adjusted to 0.3 to 10 Cst.

The hydrocarbons are prepared by blending predetermined amounts of light hydrocarbons and heavy hydrocarbons, which will be described later, and adjusting the viscosity within the range listed above.

The light hydrocarbons at this time function as a base oil for the target lubricating composition, and when the composition is applied to a metal material, it continues to exist on the surface of the material, and should be volatilized during subsequent processing. It's an ingredient.

Its boiling point is 100~310℃, preferably 150~
250°C; flash point is 3 to 150°C, preferably 60 to 1
The viscosity at 00°C and 40°C is 0.3 to 5 Cst, preferably 1 to 4 Cst. Among these properties, the flash point is particularly important, and those with a flash point below 3°C will volatilize quickly, causing problems as the lubricating composition changes during actual processing.
If the amount exceeds 100%, it is difficult to volatilize, and therefore a coating film that satisfies the lubrication performance required during actual processing cannot be obtained.

Such light hydrocarbons include, for example, mineral oils such as kerosene, gas oil, or re-fractionated fractions thereof; light polyolefins such as light polybutene, and aromatic synthetic oils such as toluene, xylene, and alkylbenzene. can be given.

Heavy hydrocarbons are components that contribute to adjusting the viscosity of the intended lubricating composition, and at the same time, they contribute to the density and density of the formed coating film.
It is a component that provides adhesion to metals, and its boiling point is 25
The viscosity at 40° C. is 25 Cst or more, preferably 80 Cst or more.

However, if the viscosity is too large, there will be a problem that degreasing performance will deteriorate, so the upper limit is set at 800C at 40℃.
It is preferable to set it to st.

Such heavy hydrocarbons include, for example, 150
Examples include mineral oils such as neutral, 300 neutral, 500 neutral, and bright stock; various synthetic oils containing polybutene, alkylbenzene, esters of polyhydric alcohols, etc., and naphthenic mineral oils are particularly suitable. Polybutene is also a suitable example.

The blending ratio of heavy hydrocarbons and light hydrocarbons is 2 to 30% by weight of the former, and 70 to 98% by weight of the latter.
It is preferable to If the blended amount of heavy hydrocarbons is 2% by weight, the coating film formed on the metal surface is likely to peel off, and the rust prevention properties are also reduced. Also, 30% by weight
Exceeding this results in a decrease in degreasing properties and a decrease in lubricity, causing problems in machining. Preferably it is 5 to 15% by weight (the latter being 85 to 85% by weight).

At this blending ratio, the viscosity of the obtained hydrocarbons (first essential component) according to the present invention at 40°C is 0.3
It can be adjusted within the range of ~10Cst. If the viscosity is 0.3 Cst, use the normal rust preventive oil application method (
mist, shower coat, etc.), there is a problem that it is not possible to obtain a coating film with sufficient thickness in terms of rust prevention and lubricity, and if it exceeds 10 Cst, the coating film becomes too thick, resulting in the need for post-processing. This will have an adverse effect on degreasing properties.

Preferably, the viscosity at 40°C is 0.3 to 5 Gst
The properties and blending ratio of both are selected so that

The second essential component in the composition of the present invention has a melting point of 40 to
It is a wax at 80°C. This component is a component that contributes to improving the lubricity of the obtained lubricating composition as well as adjusting the degreasing property. If the melting point is less than 40°C, the resulting lubricating composition will have insufficient lubricity, and if it exceeds 80°C, the degreasing property and solubility will decrease, resulting in a homogeneous composition. things become difficult. 40-60
℃ is preferred.

Examples of such waxes include waxes such as paraffin wax and microcrystalline wax; petrolatum; or lightly oxidized waxes with a total oxidation of 2 hgKOH/g or less and derivatives thereof such as esterified products; . Specifically, 1!5
Paraffin, 125 Paraffin, 135 Halafin, 1
An example of this is 45 Halafin.

The third essential component in the composition of the present invention is a rust inhibitor. The rust preventive agent according to the present invention is not particularly limited, and may be a rust preventive agent that has already been applied to the steel sheet at the time of shipment. Specifically, calcium, barium, sodium,
Ammonium sulfonates; esters of oxidized waxes and their calcium, barium, and strium derivatives; polyhydric alcohol esters such as sorbitan monooleate; lanolin, calcium lanolin soaps; alkoxyphenylamines ; dicyclohexylamine; and the like.

The lubricating composition of the present invention can be easily prepared by blending the three essential components described above in a predetermined ratio.

At this time, the amount of the second essential component is 2 to 1
Set to 0% by weight. If this amount is less than 2% by weight, the lubricating properties of the resulting lubricating composition will be reduced, and if it exceeds 10% by weight, the degreasing properties will be reduced. Preferably 3~
7% heavy acid.

The amount of the third essential component is set at 1 to 20% by weight based on the total amount. If this product is unmixed by 1% by weight, the rust prevention properties of the obtained lubricating composition will not be improved, and if it exceeds 20% by weight, problems will occur with degreasing properties and at the same time other performance improvements will occur. I can't expect that. Preferably it is 3 to 10% by weight. The remainder becomes the first essential component.

In this way, the desired lubricating composition is obtained. At that time, the viscosity of the composition is 1 to 10 Cst at 40°C.
It is effective to select the type 9 , properties, and blending ratio of each component so that , particularly preferably 2 to 5 Cst.

This lubricating composition is applied to the surface of the metal material in a film thickness of 0.3 to 100 ml using general techniques such as dipping, showering, and electrostatic coating.
2ILm (coating amount of the composition is 300-2000B/m
2).

[Example 1 of the Invention Examples 1 to 4 The indicated components were blended in the proportions shown in the table (electronic %) and thoroughly mixed to prepare lubricating compositions of each composition.

The lubricity of these compositions is as follows.

Rust prevention and degreasing properties were tested.

(1) Lubricity test ■Baudenlepen test: At room temperature, a 5UJ-2 steel ball with a diameter of 3/16 inch was placed on a 5pcc-SO plate on which a resin film was formed by applying approximately 1ILm of each lubricating composition. Place it in a fixed and point-contact state, and apply 5P while applying a vertical load of 2.0 kg.
The CC-9D plate is repeatedly moved left and right at a sliding speed of 0.67 m/sec, and the friction coefficient is determined from the torque generated at that time.

■Pull-out and ironing test: Test piece of 5PEC material specified in JIS G 3141 (length 300■Peng 9 width 30+ePeng.

These compositions were applied to both sides of a 0.8 inch (0.8 inch thick)
After coating with a thickness of 1g/2, both sides were applied with a pressing force of 800k using a die made of 5KS-3 and tempered to HRC80.
Using scissors and a cross-herad universal compression testing machine, the test piece was pulled out to a length of 150 mm at a pulling speed of 4 h/min at room temperature, and the pulling force and surface damage of the test piece were observed.

Pass if there are no scratches, fail if there are scratches And so.

■Eriksen test Conforms to Erichsen test A method specified in JIS Z 2247.

(2) Rust prevention test: ■Storage test Conforms to the method specified in JIS K 224B.

■Stack test 5PCC-9D material board (150 square layers vertically, 100 square layers horizontally.

Each composition was coated at a thickness of 1000 g #+2 on a 0.8 g (thickness 0.8 g), and after stacking 10 sheets of these, they were left in an atmosphere at a temperature of 60°C and a relative humidity of 90% for one month. The presence or absence of staining was observed. The occurrence of sting was regarded as a failure, and the occurrence of no sting was regarded as a pass.

(3) Degreasing test The test piece after the stack test was
Slashing was performed 60 times (slashing stroke 10 c, 1 time/sec) with a 2% aqueous solution (liquid temperature 60° C.) of the product (trade name), and the water wetting rate at that time was evaluated. It means that the larger this value is, the better the degreasing property is.

The above results are summarized in the table.

[Effects of the Invention] As is clear from the following explanations, the lubricating composition of the present invention has better lubricity and rust prevention than conventional compositions.

Excellent in all properties including degreasing properties. and,
This lubricating composition can be applied to the current antirust oil coating line as is, and since the coating HQ immediately after coating exhibits a low viscosity oily state, it effectively suppresses roll slip and coating peeling during coiling, for example. In addition, when unpacking the coil after a considerable period of time has passed after application, the lubricity and rust prevention properties of the coating film are further improved, so there is no need to apply additional cooling oil. is possible. In this way, by using the lubricating composition of the present invention, it is possible to increase the T.
Since the process can be simplified and the processing cost can be reduced, it greatly contributes to industrial value.

Claims (1)

[Claims] 1. 70 to 97% by weight of hydrocarbons whose viscosity at 40°C is adjusted to 0.3 to 10 centistokes, and a melting point of 40 centistokes.
2-10% by weight of waxes at ~80°C and 1-2 rust inhibitors
A rust-preventing and metal processing lubricating composition characterized by comprising: 0% by weight. 2. The hydrocarbons have a boiling point of 100 to 310°C and a flash point of 3
~150℃, light hydrocarbons with a viscosity of 0.3 to 5 centistokes at 40℃, a boiling point of 250℃ or higher, 4
The rust-preventing and metalworking lubricating composition according to claim 1, which is a hydrocarbon comprising 2 to 20% by weight of a heavy hydrocarbon having a viscosity of 25 centistokes or more at 0°C. 3. The rust-preventing and metalworking lubricating composition according to claim 1, which has a viscosity of 1 to 10 centistokes at 40°C.