Method for heating titanium blank by using continuous heating furnace

A heating furnace, continuous technology, used in the field of titanium slab heating

Inactive Publication Date: 2010-08-25
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that titanium billet heating is easy to occur, the present invention provides a method for heating titanium bille...

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  • Method for heating titanium blank by using continuous heating furnace

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Embodiment Construction

[0009] The invention provides a method for heating a titanium billet with a continuous heating furnace, which is characterized in that the titanium billet is heated to 800-900°C while avoiding a high-temperature flame area by means of radiation and convection.

[0010] The titanium billet is a titanium billet with a thickness of 150-250 mm. Including titanium billets and their alloy billets.

[0011] Preferably, the atmosphere in the furnace is controlled, and the atmosphere in the furnace is controlled to be a slightly oxidizing atmosphere. The micro-oxidizing atmosphere is to control the residual oxygen content between 0.2% and 2%.

[0012] Make the atmosphere in the furnace a slightly oxidizing atmosphere to avoid hydrogen absorption or serious oxidation of titanium at high temperatures. The atmosphere control in the furnace is realized by adjusting the ratio of air and mixed gas reasonably.

[0013] Furnace pressure is controlled at 10Pa ~ 30Pa, to avoid excessive consu...

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Abstract

The invention discloses a method for heating a titanium blank by using a continuous heating furnace. The heating temperature of the titanium blank is about 880 DEG C and is far lower than the heating temperature of about 1,200 DEG C of a steel blank; and if the titanium blank is heated by using a continuous heating furnace for heating the steel blank, over-high temperature or non-uniform heating is caused, and the over-high heating temperature causes the defects of rolling in a beta-phase area, thick and large tissue, serious surface oxidation and the like. The invention provides the method for heating the titanium blank by using the continuous heating furnace for heating the steel blank, wherein the thickness of the blank is 150 to 250 millimeters, and the titanium blank avoids a high-temperature flame area in a mode of furnace body radiation and furnace gas convection so as to achieve the effects of uniform heating temperature and good heating quality.

Description

technical field [0001] The invention relates to a heating method for a titanium slab, which belongs to the technical field of thermal engineering. Background technique [0002] Pure titanium belongs to the low-temperature type α-Ti lattice. Theoretical heating temperature is not higher than 882°C, and generally the heating temperature is controlled at 30-50°C below the phase transition temperature; when the heating temperature is higher than 882°C, the material will be rolled in the two-phase region of α-Ti and β-Ti, and the finished product cannot meet the requirements. α-Ti lattice requirements; the thermal conductivity of titanium and titanium alloys is 1 / 4 to 1 / 7 of that of alloy steel, and there must be enough heating time to make the billet evenly heated. Prolonged heating may cause local or end softening and deformation of the steel slab and grain growth of the slab; titanium and titanium alloys have high chemical activity, and are prone to violent reactions with oxy...

Claims

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Application Information

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IPC IPC(8): C22F1/18C21D9/52
Inventor 汤化胜孙业华张桂南王好东赵立忠刘莱萌任继银周平王腾飞杨旭尹翠兰孙建卫
Owner SHANDONG IRON & STEEL CO LTD
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