Hot rolling cogging process of Ti-Ni alloy ingot

A titanium-nickel alloy and ingot casting technology, applied in metal rolling, metal rolling, metal processing equipment and other directions, can solve the problems of high cost, high comprehensive cost, and low billet yield.

Inactive Publication Date: 2007-01-03
西安赛特金属材料开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two blanking methods have a low rate of material blanking and a high defective rate of around 20%.
Moreover, in general free forging, the pass processing rate is low and the efficiency is low, resulting in high overall cost and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Using 25kg vacuum induction melting furnace, at 10 -1 Under the condition of a vacuum degree above Pa, the titanium sponge and electrolytic nickel are smelted into a small titanium-nickel alloy ingot with a nominal composition of Ti-50.8at.%Ni, the melting current is 90-110A, and the melting voltage is 280-330V. The size of the ingot is Φ76×450mm, and after peeling, it becomes a smooth ingot of Φ68×450mm.

[0012] The light ingot is heat treated in the electric furnace, and the temperature is raised to 850 ±10 ℃, keep warm for 30min. Then, on the CЩM-175 stepper rolling mill, the billet is directly rolled. The rotation speed of the main motor is 150n / min., the rolling speed is 600mm / min., and the rolling step is 10mm / step; the initial rolling temperature is about 840°C, and the final rolling temperature is about 700°C; the rolling deformation rate is 52%.

[0013] Rolled titanium-nickel alloy rod Φ47 ±1 ×940mm, there are 7-8mm cup-shaped shrinkage pits at both ends,...

Embodiment 2

[0015] The preparation method of the titanium-nickel alloy ingot is the same as above. The light ingot of Φ68×450mm is heat treated in the electric furnace, and the temperature is raised to 950 ±10 ℃, keep warm for 40min. Then, on the CЩM-175 stepper rolling mill, direct billet rolling is carried out. The rotation speed of the main motor is 120n / min., the rolling speed is 480mm / min., and the rolling step is 10mm / step; the initial rolling temperature is about 930°C, and the final rolling temperature is about 700°C; the rolling deformation rate is 74%.

[0016] The rolled titanium-nickel alloy rod is Φ35 ±1 ×1740mm, its elongation factor reached 4. There are 12-15mm cup-shaped shrinkage pits at both ends, but there are no macroscopic defects on the surface. The internal metallographic structure is basically a dynamic recovery recrystallization structure, but there are obvious elongated and deformed grains in the longitudinal direction.

[0017] The direct blanking method fo...

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PUM

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Abstract

The present invention relates to high efficiency and low power consumption hot rolling cogging process of Ti-Ni alloy ingot, and features that the technological process includes the steps of: heat treatment of the Ti-Ni alloy ingot, cogging and rolling Ti-Ni alloy rod. The heat treatment before cogging has temperature of 750-950 deg.c, and during the cogging, the deformation region of the Ti-Ni alloy ingot is applied with circumferential symmetrical rolling force and longitudinal continuous gradient rolling force. The rolling process has short period, great rolling deformation rate and high efficiency, and is suitable for industrial production, and the rolled Ti-Ni alloy rod has high sized precision and high finished product rate.

Description

technical field [0001] The invention relates to a high-efficiency, low-consumption hot rolling blanking processing method for titanium-nickel ingots. Background technique [0002] Titanium-nickel alloy is a new type of multifunctional material, which has peculiar shape memory, phase transition superelasticity and high damping characteristics, and at the same time, has high strength, good corrosion and wear resistance, and excellent biocompatibility. Titanium-nickel alloys can be used as engineering materials, smart materials, and medical materials, and have a wide range of applications. Its applications have been in various fields such as electronics, machinery, aviation, energy, transportation, construction, home appliances, medical and health care, and daily necessities. However, titanium-nickel alloy is an intermetallic compound material, which is brittle and hard, and it is difficult to process the material. Moreover, the properties of the material vary greatly due to sm...

Claims

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Application Information

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IPC IPC(8): B21B1/02B21B15/00
Inventor 杨华斌曹继敏杨冠军王廷询李长亮牛中杰杨宏进熊全明
Owner 西安赛特金属材料开发有限公司
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