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Low-fire-consumption pure-titanium forging heating technology

A forging heating and pure titanium technology, which is applied in the field of metal forging, can solve the problems of raw material loss, unreasonable forging heating process, unqualified large-scale forgings, etc., and achieve the effect of reducing energy consumption, shortening the heating cycle and shortening the heating time

Inactive Publication Date: 2013-08-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing titanium and titanium alloy forging heating process often does not take into account the oxidation mechanism of titanium at high temperature, and the loss mechanism and oxidation rate of high temperature oxidation are not clear. Due to high-temperature oxidation during the forging process, a large amount of scale and hard and brittle phases are formed on the surface, which not only causes the loss of raw materials, but also severe oxidation is one of the main reasons for the easy cracking of forging
Unreasonable forging heating process will also cause a large number of unqualified forgings, which will bring serious economic losses to the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0020] A low fire consumption pure titanium forging heating process; comprising the following steps:

[0021] (1) Pretreatment: Peel off the surface of the pure titanium ingot with a diameter of 140mm, turn off the loose tissue at the bottom end, reverse the R angle at the head and tail ends, polish to remove surface pore defects, and evenly coat a layer of Zhejiang Huangyan special paint on the surface The high temperature resistant and decarbonized 202 paint produced by the factory;

[0022] (2) Preheating: Heat the resistance furnace to 500°C, then put the pure titanium ingot coated with high temperature resistant and anti-decarburization coating on the stainless steel plate of the resistance furnace, preheat at 500°C for 100 minutes, and make the ingot Even heating inside and outside;

[0023] (3) The second heating stage: heat up to 850°C at a heating rate of 1.8°C / min, and hold for 70 minutes;

[0024] (4) The third heating stage: Continue to heat up to 920°C at a heat...

Embodiment 2）

[0027] A low fire consumption pure titanium forging heating process; comprising the following steps:

[0028] (1) Pretreatment: Peel off the surface of the pure titanium ingot with a diameter of 140mm, turn off the loose tissue at the bottom, reverse the R angle at the head and tail, polish and remove the surface pore defects, and evenly coat the surface with anti-high temperature and anti-decarburization paint;

[0029] (2) Preheating: Heat the resistance furnace to 650°C, then put the pure titanium ingot coated with high temperature resistant and anti-decarburization coating on the stainless steel plate of the resistance furnace, preheat at 650°C for 80 minutes, and make the ingot Even heating inside and outside;

[0030] (3) The second heating stage: raise the temperature to 865°C at a heating rate of 1.8°C / min, and keep it warm for 60 minutes;

[0031] (4) The third heating stage: Continue to heat up to 940°C at a heating rate of 2.0°C / min. After the temperature in the f...

Embodiment 3）

[0034] A low fire consumption pure titanium forging heating process; comprising the following steps:

[0035] (1) Pretreatment: Peel off the surface of the pure titanium ingot with a diameter of 140mm, turn off the loose tissue at the bottom, reverse the R angle at the head and tail, polish and remove the surface pore defects, and evenly coat the surface with anti-high temperature and anti-decarburization paint;

[0036] (2) Preheating: Heat the resistance furnace to 700°C, then put the pure titanium ingot coated with high temperature resistant and anti-decarburization coating on the stainless steel plate of the resistance furnace, preheat at 700°C for 60 minutes, and make the ingot Even heating inside and outside;

[0037] (3) The second heating stage: heat up to 880°C at a heating rate of 1.8°C / min, and hold for 50 minutes;

[0038] (4) The third heating stage: Continue to heat up to 960°C at a heating rate of 2.0°C / min. After the temperature in the furnace reaches 960°C, ...

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Abstract

The invention relates to the field of metal forging, in particular to a low-fire-consumption pure-titanium forging heating technology. The technology comprises the steps of pretreatment, preheating for 60 minutes to 100 minutes at the temperature ranging from 500 DEG C to 700 DEG C, heat preservation for 50 minutes to 70 minutes at the temperature ranging from 850 DEG C to 880 DEG C at a second heating stage, heat preservation for 20 minutes to 30 minutes at the temperature ranging from 920 DEG C to 9600 DEG C and the like. According to the technology, by means of a three-stage heating mode, defects of cracks produced in a traditional one-step heating mode and oxide skin and hard and brittle phases which are produced on the surface can be effectively overcome, the heating cycle can be shortened, the energy consumption can be reduced, the production cost is saved, and energy-saving and emission reduction purposes are achieved.

Description

technical field [0001] The invention relates to the field of metal forging, in particular to a pure titanium forging heating process with low fire consumption. Background technique [0002] Due to their high specific strength, excellent corrosion resistance and good biocompatibility, titanium and titanium alloys are widely used in aerospace, marine, chemical, energy, medical and health fields. Titanium is also a very active metal with strong affinity with impurities such as oxygen, nitrogen, and carbon in the air. Even in the atmosphere at room temperature, a very thin dense oxide layer can be formed on the surface of titanium and titanium alloys. This is also the reason why titanium and titanium alloys have excellent corrosion resistance. However, the existing titanium and titanium alloy forging heating process often does not take into account the oxidation mechanism of titanium at high temperature, and the loss mechanism and oxidation rate of high temperature oxidation ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J1/00B21J1/06
Inventor 胡静高欣艳王大月王树凯王燕
Owner CHANGZHOU UNIV
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