Thermal-covering process for thermal forming of super-large titanium alloy whole frame die forging

A titanium alloy and hot forming technology, applied in metal processing equipment, manufacturing tools, forging/pressing/hammer devices, etc., can solve the problems of poor filling of forgings, uneven structure and performance, and achieve low cost, simple operation, and low cost. The effect of equipment tonnage

Active Publication Date: 2016-10-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a hot sheathing process for hot forming of extra-large titanium alloy full-frame die forgings to prevent the surface temperature of the billet from dropping too fast during the transfer and production process, so as to solve the current problem of over-large titanium alloy full-frame die forgings. In the production of die forgings, the problems of poor filling and uneven structure and properties of forgings

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  • Thermal-covering process for thermal forming of super-large titanium alloy whole frame die forging
  • Thermal-covering process for thermal forming of super-large titanium alloy whole frame die forging
  • Thermal-covering process for thermal forming of super-large titanium alloy whole frame die forging

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific implementation.

[0036] Before the specific implementation of the hot sheathing process, it is necessary to conduct a hot sheathing process test to determine the sheathing material, specification, sheathing method, heating time after sheathing and the transfer time of the titanium alloy blank forging. The specific process is as follows:

[0037] a. Prepare several titanium alloy test blocks with the same specifications, and drill a temperature measuring hole directly to the center of the test block on the test block;

[0038] b. Preheat the titanium alloy test block, apply protective lubricant, and then self-heat and air-cool;

[0039] c. Place the titanium alloy test block in the heating furnace and heat it to the forging temperature. When the heating furnace reaches the temperature, heat preservation is carried out. The heat preservation time is calculated by multiplying the effective ...

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Abstract

The invention relates to the field of forging of large die forgings, and discloses a thermal-covering process for thermal forging of a super-large titanium alloy whole frame die forging. The process includes the following steps of pre-heating a blank, coating the blank with a protective lubricant, heating the blank to a forging temperature and conducting heat preservation, covering the outer surface of the titanium blank with a covering material through a binder, placing the blank into an electric furnace again to be heated after thermal-covering is completed, and taking the blank out of the furnace to be forged after being heated to the forging temperature. The process is simple in operation, low in cost and capable of preventing the surface temperature of the blank from descending too fast in the transferring and producing procedures and ensuring the effect that the blank is at a high start-forging temperature during die forging; and material flowing of the forging is facilitated, the tonnage of equipment can be lowered, and the problems of poor filling and the non-uniform structure property of the forging during existing production of the super-large titanium alloy whole frame die forging can be solved.

Description

technical field [0001] The invention relates to the field of forging of large die forgings, in particular to a hot sheathing process for hot forming of extra large titanium alloy whole frame die forgings. Background technique [0002] Titanium alloy has the characteristics of narrow forging temperature range, high deformation resistance, and difficult forming. Titanium alloy die forging is generally produced by forging process of direct die forging after heating the billet. In actual production, the titanium alloy billet is clamped out from the heating furnace to press On-machine forging, the intermediate process includes furnace transfer, material placement and forging. During this period, due to the influence of radiation heat transfer and contact heat transfer, the temperature of the titanium alloy billet will drop rapidly, and the forming temperature will drop, resulting in poor forging shape. , Inhomogeneous microstructure and properties seriously affect the quality of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J1/06B21K29/00B21J5/02
CPCB21J1/06B21J5/02B21K29/00
Inventor 张鹏祝力伟向伟熊运森朱知寿
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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