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Preparation method of titanium and titanium alloy seamless tube blank

A technology of seamless tube blanks and titanium alloys, which is applied in the field of preparation of titanium and titanium alloy seamless tube blanks, can solve the problems of high investment, rising billet manufacturing costs, and high costs, and achieve the effects of reducing costs and improving production efficiency

Active Publication Date: 2015-07-01
宝鸡华岚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the preparation principle of the tube blank prepared by cross-rolling and piercing, there are microcracks in the inner hole of the obtained tube blank, and the quality is poor; at the same time, due to the influence of the piercing deformation mold, the thickness of the prepared tube should not be too thin (generally the outer diameter and wall Thick ratio ≥ 10)
The quality of the inner hole of the tube billet prepared by extrusion is better, but when extruding, it needs to be lubricated with copper as the cladding layer, which consumes a lot of precious metal copper, and the cost is high; in addition, the extruder is a large equipment, higher investment
[0003] Especially for the preparation of small batches and multi-standard tube blanks, the above two billet making methods will cause frequent replacement of molds and tooling, which will cause a substantial increase in billet making costs

Method used

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  • Preparation method of titanium and titanium alloy seamless tube blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1. Forge the TA2 pure titanium ingot into a bar, and then polish the outer surface of the bar to obtain the outer diameter D 0 A light rod with a length L of 60mm and a length L of 150mm;

[0029] Step 2. Drilling the optical rod described in step 1. The inner diameter of the drilled optical rod is the same as the inner diameter d of the tube blank to be prepared, and the inner hole roughness Ra is 2.5 μm; the inner diameter of the tube blank is d is 20mm;

[0030] Step 3. Mix the glass powder and water to form a paste. Apply the paste to the outer surface and inner hole of the light rod drilled in step 2 as a lubricant. After drying, place the light rod in the muffle Heat in the furnace to 150°C above the recrystallization temperature of the light rod, and keep it warm for 3 hours;

[0031] Step 4. Insert the H13 steel rod with a length of 1000mm into the light rod after heat preservation in step 3; the steel rod is a steel rod whose diameter gradually shrinks a...

Embodiment 2

[0035] Step 1. Forge the TA16 titanium alloy ingot into a bar, and then polish the outer surface of the bar to obtain the outer diameter D 0 Light rod with a length of 45mm and a length L of 300mm;

[0036] Step 2. Drilling the optical rod described in step 1. The inner diameter of the drilled optical rod is the same as the inner diameter d of the tube blank to be prepared, and the inner hole roughness Ra is 2.0 μm; the inner diameter of the tube blank is d is 25mm;

[0037] Step 3. Mix the glass powder and water to form a paste. Apply the paste to the outer surface and inner hole of the light rod drilled in step 2 as a lubricant. After drying, place the light rod in the muffle Heat in the furnace to 250°C above the recrystallization temperature of the light rod, and keep it warm for 2 hours;

[0038] Step 4. Insert the H13 steel rod with a length of 1200mm into the light rod after heat preservation in step 3; the steel rod is a steel rod whose diameter gradually shrinks and...

Embodiment 3

[0042] Step 1. Forge the TA18 titanium alloy ingot into a bar, and then polish the outer surface of the bar to obtain the outer diameter D 0 Light rod with a length of 70mm and a length L of 160mm;

[0043] Step 2. Drilling the optical rod described in step 1. The inner diameter of the drilled optical rod is the same as the inner diameter d of the tube blank to be prepared, and the inner hole roughness Ra is 2.5 μm; the inner diameter of the tube blank is d is 28mm;

[0044] Step 3. Mix the glass powder and water to form a paste. Apply the paste to the outer surface and inner hole of the light rod drilled in step 2 as a lubricant. After drying, place the light rod in the muffle Heat in the furnace to 200°C above the recrystallization temperature of the light rod, and keep it warm for 2.5 hours;

[0045] Step 4. Insert the H13 steel rod with a length of 1100mm into the light rod after heat preservation in step 3; the steel rod is a steel rod whose diameter gradually decreases...

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Abstract

The invention discloses a preparation method of a titanium and titanium alloy seamless tube blank. The preparation method comprises the following steps of 1, casting a cast ingot into a rod, and then polishing the outer surface of the rod so as to obtain a polish rod; 2, drilling the polish rod; 3, coating a lubricant on the outer surface and an inner hole of the drilled polish rod, and then heating the polish rod coated with the lubricant; 4, inserting a steel rod into the polish rod; 5, casting the polish rod into which the steel rod is inserted until the outer diameter of the polish rod is 1-1.5 mm larger than the outer diameter of the tube blank which needs to be prepared, and withdrawing the steel rod to obtain a semi-finished product; 6, straightening the semi-finished product, and polishing the inner surface and the outer surface of the straightened semi-finished product according to the size of the tube blank which needs to be prepared so as to obtain the tube blank. According to the preparation method, the titanium and titanium alloy seamless tube blank is prepared by a method of drilling and casting, so that the cost for a copper material and a mold is saved, the cost is reduced, the production efficiency is greatly improved, and the preparation method is particularly suitable for production of a small amount of the tube blanks with various specifications.

Description

technical field [0001] The invention belongs to the technical field of preparation of seamless pipe blanks, and in particular relates to a preparation method of titanium and titanium alloy seamless pipe blanks. Background technique [0002] The preparation of titanium and titanium alloy seamless tube blanks generally has two preparation methods: cross-rolling, piercing and extrusion. Due to the preparation principle of the tube blank prepared by cross-rolling and piercing, there are microcracks in the inner hole of the obtained tube blank, and the quality is poor; at the same time, due to the influence of the piercing deformation mold, the thickness of the prepared tube should not be too thin (generally the outer diameter and wall thick ratio ≥ 10). The quality of the inner hole of the tube billet prepared by extrusion is better, but when extruding, it needs to be lubricated with copper as the cladding layer, which consumes a lot of precious metal copper, and the cost is hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 张斌
Owner 宝鸡华岚新材料科技有限公司