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Prepn and application of glass lubricant specially for hot extrusion of high temperature alloy pipe

A technology of glass lubricants and superalloys, applied in lubricating compositions, petroleum industry, base materials, etc., can solve problems such as high extrusion force, inability to process extrusion machines, scratches on the surface of extrusion pipes, etc., to achieve extrusion Reduced force, good lubricating effect, and reduced production cost

Inactive Publication Date: 2004-01-21
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the above lubrication method is applied to the extrusion of high-temperature alloy pipes, the existing problems are that the surface of the extruded pipe is severely scratched, the extrusion force is large, and the extrusion machine with a small extrusion tonnage cannot process it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] By 60% SiO 2 , 15%Al 2 o 3 , 12% CaO, 3% Na 2 O, 10% B 2 o 3 Preparation of H glass raw material, high temperature melting, water quenching into massive H glass, coarse grinding, fine grinding, fine grinding, passing through 200 mesh sieve to obtain H glass powder with particle size less than 0.07mm. Then 40% of H glass powder, 3% of 100 mesh (particle size less than 0.1mm) Cr 2 o 3 , 15% commercially available heat-resistant cellulose, and the rest of water mixed with ball mill to obtain a special glass lubricant for hot extrusion of superalloy pipes. According to the above conditions, hot extrusion tests were carried out on In718 and GH1140 tube blanks. The product surface is smooth and the quality is high. qualified.

Embodiment 2

[0015] By 55% SiO 2 , 18%Al 2 o 3 , 14% CaO, 3% Na 2 O, 10% B 2 o 3 Preparation of H glass raw material, high temperature melting, water quenching into massive H glass, coarse grinding, fine grinding, fine grinding, passing through 200 mesh sieve to obtain H glass powder with particle size less than 0.07mm. Then 40% of H glass powder, 3% of 100 mesh (particle size less than 0.1mm) Cr 2 o 3 , 15% commercially available heat-resistant cellulose, and the rest of water mixed with ball mill to obtain a special glass lubricant for hot extrusion of superalloy pipes. According to the above conditions, hot extrusion tests were carried out on In718 and GH1140 tube blanks. The product surface is smooth and the quality is high. qualified.

Embodiment 3

[0017] By 50% SiO 2 , 10%Al 2 o 3 , 18% CaO, 5% Na 2 O, 17% B 2 o 3 Preparation of H glass raw material, high temperature melting, water quenching into massive H glass, coarse grinding, fine grinding, fine grinding, passing through 200 mesh sieve to obtain H glass powder with particle size less than 0.07mm. Then 40% of H glass powder, 3% of 100 mesh (particle size less than 0.1mm) Cr 2 o 3 , 15% commercially available heat-resistant cellulose, and the rest of water mixed with ball mill to obtain a special glass lubricant for hot extrusion of superalloy pipes. According to the above conditions, hot extrusion tests were carried out on In718 and GH1140 tube blanks. The product surface is smooth and the quality is high. qualified.

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Abstract

The glass lubricant specially for hot extrusion of high temperature alloy pipe consists of Cr2O3 2-3 wt%, refractory cellulose 10-20 wt% and H glass 32-40 wt% except H2O, where H glass consists of Al2O3 10-18 wt%, CaO 12-18 wt%, Na2O 3-5 and B2O3 10-18 wt% except SiO2. The glass lubricant of the present invention has high temperature lubricating effect and heat isolating effect to reduce the decrease of blank temperature, and is chemically stable to produce no chemical reaction with blank metal, ropy and high in lubricating effect. Compared with available lubricant, the glass lubricant has raised product quality, lowered production cost, prolonged extruding mold life, lowered power consumption.

Description

Technical field: [0001] The invention relates to the processing technology of metal pipes, and in particular provides a special glass lubricant for hot extrusion of high-temperature alloy pipes and its application method. Background technique: [0002] Superalloy pipes are materials widely used in key components of energy conversion devices in aviation, aerospace vehicles, ships, power generation, rocket engines, nuclear reactors, locomotives, and petrochemical industries. The most effective way to make high-temperature alloy pipe blanks is hot extrusion processing, and the most critical technology for extrusion processing is lubricant technology. For nickel-based high-temperature alloy materials, due to their high strength, the lubricant used in the extrusion process must have high-temperature lubrication. [0003] For stainless steel or low-strength high-temperature alloys, the common lubrication method is to apply glass powder to the preheated billet and mold, and then h...

Claims

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Application Information

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IPC IPC(8): B21C23/32C10M103/00
Inventor 张士宏段素杰李锡春王忠堂许沂周文龙
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI