Novel glass lubricant of stainless steel extruded tube

A glass lubricant and stainless steel technology, applied in lubricating compositions, base materials, metal rolling, etc., can solve the problems of groove scratches, poor surface quality of steel pipes, dull metal surfaces, etc., and achieve the best comprehensive viscosity and high crystallization speed effect

Active Publication Date: 2013-07-17
BEIJING TIAN LICHUANG SCI & TECH OF GLASS DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that for the third stage of extrusion, whether the glass viscosity is low or high, the surface quality of the steel pipe will be poor. Defects such as scratches, dotted lines, pinholes, groove scratches, etc., it is difficult to extrude and produce stainless steel pipes without grinding

Method used

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  • Novel glass lubricant of stainless steel extruded tube
  • Novel glass lubricant of stainless steel extruded tube
  • Novel glass lubricant of stainless steel extruded tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The combination of external coating powder 844-7 + internal coating powder A5 + glass mat A5 (combination mode 1) is used as the glass lubricant for stainless steel extruded tubes to produce stainless steel extruded steel tubes.

[0030] The composition and related performance parameters of external coating powder 844-7 and internal coating powder A5 are as follows:

[0031] Chemical composition, unit %:

[0032] SiO2 Al2O3 CaO MgO Fe2O3 TiO2 R2O B2O3 A5 35-58 3-20 0-8 0-8 0.1 0-12 2-18 0-15 844-7 20-50 0-12 0-17 0-12 0.15 0-4 15-30 10-28

[0033] High temperature physical property data, unit ℃:

[0034]

[0035] High temperature viscosity data, unit ℃:

[0036] Logη= 2.0 2.5 3.0 A5 1400±30 1300±30 1170±30 844-7 1180±30 1080±30 1000±30

[0037] Granular data:

[0038] A5 has five specifications according to the mesh number: 20 mesh to 40 mesh, 40 mesh to 60 mesh, 60 mesh to 80 m...

Embodiment 2

[0042]Similar to Example 1 to form a glass lubricant, but replace the glass pad with GD19, that is, the glass lubricant combination mode 2 is external coating powder 844-7 + internal coating powder A5 + glass pad GD19, and this glass lubricant is used for production A photograph of the surface state of the steel pipe is shown in Fig. 2.

[0043] Figure 2 shows the surface defects of steel pipes produced by glass combination method 2. in Figure 2a shows surface imperfections in the form of slight groove scratches, Figure 2b show surface defects in the form of slight orange peel streaks, Figure 2c show surface defects in the form of slight indentations, Figure 2d Shows surface imperfections in the form of slight pinholes. Obviously, although the group of photos in Figure 2 shows that there are still defects on the surface of the steel pipe, they are much lighter than those in Figure 1, and only need simple grinding, and there will be no waste products.

[0044] The comp...

Embodiment 3

[0049] Similar to Example 2 to form a glass lubricant, but the external coating powder is replaced by GW8, and the internal coating powder is replaced by GN26, that is, the combination mode 3 of the glass lubricant is GW8+GN26+GD19, and this glass lubricant is used A photograph of the surface state of the produced steel pipe is shown in FIG. 3 .

[0050] Composition and performance parameters of external coating powder GW8:

[0051]

[0052]

[0053] The measurement methods and units of chemical composition, particle composition, high-temperature physical properties and high-temperature viscosity in the table are the same as in Example 2.

[0054] Composition and performance parameters of internal coating powder GN26:

[0055]

[0056]

[0057] The measurement methods and units of chemical composition, particle composition, high-temperature physical properties and high-temperature viscosity in the table are the same as in Example 2.

[0058] A steel pipe with an ...

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Abstract

The invention provides a novel glass lubricant of a stainless steel extruded tube. The lubricant is composed of three glasses of a novel glass formulation including exterior coating powder GW8, interior coating powder GN26 and a glass pad GD19 which are respectively acted on a roller coating or spraying coating phase, a broaching phase and an extrusion phase. Compared with the traditional like products, the lubricant provided by the invention has better protecting and lubricating properties. Through utilizing the product provided by the invention, the surface defects of the stainless steel are fewer and the grinding rate can be obviously reduced.

Description

technical field [0001] The invention relates to a novel glass lubricant, in particular to a glass lubricant for hot extrusion of stainless steel seamless steel pipes. Background technique [0002] Stainless steel extrusion is a method of metal thermoforming, which is carried out at a temperature above the recrystallization temperature. Stainless steel extrusion is to extrude a billet from a die hole to obtain a cross section in the shape of the die hole. Most stainless steel extrusions use glass as a lubricant, because grease and graphite are used as lubricants, which cannot meet the requirements of high temperature and high pressure resistance in the steel extrusion process, resulting in poor lubrication performance, many defects in extrusion products, and short die life. [0003] Since the glass lubricant has a certain viscosity and good heat insulation effect at high temperature, it can make the dry friction of the contact surface into boundary friction as much as possib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M103/00C10N40/24B21B25/04
Inventor 段素杰陈培良邹丰王长城李锡春罗洪春
Owner BEIJING TIAN LICHUANG SCI & TECH OF GLASS DEV
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