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High-temperature alloy cold material pulling two-segment type electric quenching softening annealing technology

A softening annealing, two-stage technology, which is applied in the softening annealing of large-size round rods and hexagonal superalloy cold-drawn materials, and the softening annealing process of two-stage power electric heating, which can solve the problems of reduced yield, tip breakage, and softening. Problems such as poor annealing effect, to achieve the effect of improving the yield

Active Publication Date: 2017-06-23
FUSHUN SPECIAL STEEL SHARES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a two-stage electric quenching softening annealing process for high-temperature alloy cold-drawn materials, which solves the problem of poor softening and annealing effect of large-scale hexagonal high-temperature alloy cold-drawn blanks
In order to solve the problem of over-burning and tip breaking, and avoid the reduction of the finished product rate caused by multiple tip cutting, the present invention adopts a two-stage power electric heating process, that is, low-power preheating is performed first, and the temperature of the billet tip and other parts is synchronized and constant. , and then carry out higher power electric heating, and the billet is quenched quickly after reaching the temperature

Method used

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  • High-temperature alloy cold material pulling two-segment type electric quenching softening annealing technology
  • High-temperature alloy cold material pulling two-segment type electric quenching softening annealing technology
  • High-temperature alloy cold material pulling two-segment type electric quenching softening annealing technology

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Effect test

Embodiment 1

[0018] The hexagonal finished product size of nickel base hard-to-deform GH4738 alloy is S9mm, the billet diameter is Φ14mm, and the length is 3.2m~3.5m; The heating power is increased to 230kW, and after the billet is heated to 1100°C, the billet is quickly quenched in water (the time to stop heating until it enters the water is shorter than 5s). damage, grain structure such as figure 1 As shown, the grain size is grade 4, without over-burning and overheating.

Embodiment 2

[0020] Nickel-based GH4033 alloy hexagonal finished product size S19mm, billet diameter Φ25mm, length 2.0m~2.5m, the heating power of the first stage of the billet is 180kW. Raise to 300kW, after the billet is heated to 1080°C, the billet is quickly quenched in water (stop heating until it enters the water for less than 5s). figure 2 As shown, the grain size is 4.5, without overheating and overheating.

Embodiment 3

[0022] The iron-based GH2696 alloy hexagonal finished product size is S32mm, the billet diameter is Φ42mm, and the length is 3.2m~3.6m. The heating power of the first stage of the billet is 350kW. Raise to 450kW, after the billet is heated to 1060°C, the billet is quickly quenched in water (stop heating until it enters the water for less than 5s), the hardness (HBW) of the billet after annealing is 176, and the softening rate is 22.1%. image 3 As shown, the grain size is 8 grades, without over-burning and overheating.

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Abstract

The invention discloses a two-segment type power electric heating softening annealing technology. An electric quenching device is used for replacing a continuous type roller bottom annealing furnace to carry out softening annealing on a high-temperature alloy cold drawing billet; after the cold drawing billet is subject to tip twisting, the section size of the tip is small, the resistance is large, the temperature rise of the portion is higher than that of the other portions, and overburning or tip breaking of the billet is caused. In order to solve the overburning and tip breaking problems, and avoid the yield decreasing generated by repeated tip cutting, a two-segment type power electric heating technology is adopted, low-power preheating is carried out, the twisted tip portion and the other portions of the billet are subject to temperature synchronous constant treatment, high-power electric heating is carried out, after the billet reaches the temperature, rapid water quenching is carried out, through the technology, the overburning or tip breaking problem of the tip twisting portion of the billet is effectively solved, and the yield of a large-specification high-temperature alloy cold drawing material is improved.

Description

technical field [0001] The invention belongs to the softening and annealing process of high-temperature alloy cold-drawn materials, and specifically relates to the application of electric quenching equipment to the softening and annealing of high-temperature alloy cold-drawn materials and a two-stage power electric heating softening and annealing process, which is suitable for large-size round bars and hexagonal high-temperature Softening annealing of alloy cold drawn materials. Background technique [0002] Due to the high deformation resistance of the superalloy, the hexagonal superalloy cold-drawn material needs to be drawn for the round billet for multiple passes before it can be formed (the superalloy cold-drawn material with a distance between the opposite sides of the finished hexagon greater than 30mm generally requires more than 8 passes. drawing), in order to smoothly carry out the drawing of each pass and obtain a good drawing surface quality, the blank needs to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/32C21D1/34C21D1/18
CPCC21D1/18C21D1/32C21D1/34
Inventor 于腾丑英玉邢宝富赵长虹吴桂林王志刚
Owner FUSHUN SPECIAL STEEL SHARES
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