Hot Forming Lubricant Composition for Seamless Pipe Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional lubricants used in seamless pipe production via the Mannesmann process exhibit water resistance at high temperatures, leading to adherence to equipment and difficulty in cleaning, while water-soluble polymer-based lubricants lack sufficient lubricity at high temperatures, causing seizing and equipment damage.
Innovation Solution
A lubricant composition comprising a solid lubricant, water-dispersible synthetic resin, and inorganic acid amine salt, specifically formulated to maintain lubricity at high temperatures without water resistance at low temperatures, ensuring effective washing and preventing equipment damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricants with water resistance are used, then lubricity is maintained, but the lubricant adheres to equipment and is difficult to clean
Solution Approach 1:
The invention changes the temperature-dependent parameters of the lubricant composition by using a water-soluble polymer that exhibits different solubility characteristics at different temperatures. At high temperatures (80°C or more), the polymer maintains stability and lubricity, while at low temperatures (below 40°C), it becomes water-soluble for easy cleaning. This parameter change resolves the contradiction between maintaining lubricity and enabling cleanability.
Solution Approach 2:
The invention uses a composite lubricant composition comprising water-soluble polymer, solid lubricant, and inorganic acid amine salt. The water-soluble polymer provides the temperature-dependent solubility特性, the solid lubricant (graphite, boron nitride, or mica) provides high-temperature lubricity, and the inorganic acid amine salt enhances water solubility at low temperatures. This composite material approach resolves the contradiction by combining materials with complementary properties.
2Ease of operation
If water-soluble polymer-based lubricants are used, then cleanability is improved, but lubricity is insufficient at high temperatures
Solution Approach 1:
The invention combines water-soluble polymer with solid lubricants (graphite, boron nitride, or mica) and inorganic acid amine salt to create a composite lubricant. The solid lubricant components provide the necessary high-temperature lubricity that pure water-soluble polymers lack, while the water-soluble polymer matrix ensures cleanability. This composite approach resolves the contradiction between cleanability and lubricity.
Solution Approach 2:
The invention utilizes the temperature-dependent behavior of the water-soluble polymer and inorganic acid amine salt combination. At high temperatures during forming, the composition maintains lubricity through the solid lubricant and stabilized polymer structure. At low temperatures during cleaning, the polymer and inorganic acid amine salt become water-soluble, enabling easy removal. This parameter change resolves the contradiction between lubricity and cleanability.
3Reliability
If lubricant with water resistance is used, then lubricity is maintained, but equipment maintenance becomes difficult
Solution Approach 1:
The invention changes the water resistance parameter of the lubricant based on temperature. The water-soluble polymer and inorganic acid amine salt provide water resistance at high temperatures to maintain lubricity, but become water-soluble at low temperatures to facilitate easy cleaning and maintenance. This parameter change resolves the contradiction between lubricity and maintenance ease.
Solution Approach 2:
The composite lubricant composition combines water-soluble polymer, solid lubricant, and inorganic acid amine salt to achieve temperature-dependent behavior. The inorganic acid amine salt specifically enhances water solubility at low temperatures for easy maintenance, while the solid lubricant ensures high-temperature lubricity. This composite approach resolves the contradiction between lubricity and maintenance ease.
4Reliability
If lubricant is sprayed on heated mandrel bar, then lubricity is provided, but the lubricant is peeled or washed by roll cooling water
Solution Approach 1:
The invention utilizes temperature-dependent parameter changes of the water-soluble polymer and inorganic acid amine salt. When sprayed on the heated mandrel bar (80°C or more), the composition maintains coating stability and lubricity. When exposed to cooler roll cooling water, the polymer and inorganic acid amine salt become water-soluble, allowing easy removal. This parameter change resolves the contradiction between coating stability and washability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The lubricant composition provides sustained lubricity at 80°C or more without peeling or washing by roll cooling water, while being easily washable at 40°C or less, thereby preventing equipment damage and maintaining optimal working conditions.
Implementation Method 1
a lubricant which has mainly a solid lubricant workable in high temperature, and additionally has specific water-dispersible synthetic resin and inorganic acid amine salt... it does not have water resistance at low temperature below 40° C., thus it is easily washed by water
Data Source
AI summary
The present invention provides a lubricant composition for hot forming which makes it possible to provide lubricity at 80° C. or more without being peeled or washed by the roll cooling water, and which is easily washed under 40° C. without having water resistance. The lubricant composition for hot forming of the present invention comprises: a solid lubricant from 10 to 40% by mass; water-dispersible synthetic resin from 5 to 20% by mass; inorganic acid amine salt from 0.5 to 5% by mass; and water from 45 to 80% by mass.