Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of large cylindrical titanium casting with opening

A cylindrical and casting technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of low casting quality of large cylindrical titanium castings with openings, and reduce subsequent repair welding treatment and deformation. and uneven shrinkage, reducing the effect of casting deformation

Pending Publication Date: 2022-07-08
LUOYANG SUNRUI TI PRECISION CASTING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low casting quality of large cylindrical titanium castings with openings, the invention provides a method for preparing large cylindrical titanium castings with openings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of large cylindrical titanium casting with opening
  • Preparation method of large cylindrical titanium casting with opening
  • Preparation method of large cylindrical titanium casting with opening

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0016] Referring to the accompanying drawings, the specific embodiments are as follows:

[0017] A method for preparing a large cylindrical titanium casting with an opening, the cylindrical titanium casting comprises a cylinder with a diameter of not less than 500 mm and a length of not less than 1000 mm, and a rectangular opening is provided on the side wall of the cylinder.

[0018] First, make a casting mold according to the shape and size of the cylindrical titanium casting. The casting mold adopts a graphite mold or a graphite outer + investment inner core mold. The shape and inner cavity of the casting mold are matched with the cylindrical titanium casting. The inner cavity space of the casting mold corresponding to the opening edge of the cylindrical titanium casting is enlarged radially to ensure that the opening edge of the casting cylindrical titanium casting is thickened by at least 2 mm.

[0019] Then, the pouring mold and the pouring furnace are connected to form ...

Embodiment 1

[0022] A new type of high temperature resistant ZTi700SR titanium alloy (tensile strength above 300MPa at 750°C) was prepared by two smelting processes in a vacuum consumable furnace. The weight of the ingot was 500kg, and the composition and impurity content met the requirements. Long cylindrical titanium casting, the diameter of one end of the casting is φ600mm, the diameter of the other end is φ720mm, and the length is 1500mm. The thickness near the opening of the casting is the thinnest (3mm), the thickest at both ends of the cylinder (about 28mm), and the thickness of other areas is gradually between 3-28mm transition.

[0023] The casting mold is composed of multiple mold bodies 3, and graphite molds are used both inside and outside. When assembling the casting mold, first place the core on the lower mold, assemble according to the core assembly drawing, and then install the upper mold. If there is no core, then install the upper mold. The upper mold is directly placed o...

Embodiment 2

[0028] A new type of high temperature resistant ZTi700SR titanium alloy (tensile strength above 300MPa at 750°C) was prepared by two smelting processes in a vacuum consumable furnace. The weight of the ingot was 500kg, and the composition and impurity content met the requirements. Long cylindrical titanium casting with open areas and windows on the casting.

[0029] The pouring mold is composed of a plurality of mold bodies 3. The outer part is a machined graphite mold, and the inner part uses a yttrium oxide composite mold shell. When the mold shell is prepared, the wax mold is coated with corundum + mullite sand + yttrium oxide + silica sol Multi-layer preparation, then drying, roasting and surface treatment, the composite shell can improve the air permeability and concession, and reduce the formation of casting defects while ensuring the strength at room temperature and high temperature.

[0030] When assembling the casting mold, first place the core on the lower mold, asse...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

A preparation method of a large cylindrical titanium casting with an opening comprises the steps that firstly, a pouring mold is manufactured according to the shape and size of the cylindrical titanium casting, the shape and an inner cavity of the pouring mold are matched with those of the cylindrical titanium casting, and the inner cavity space, corresponding to the edge of the opening of the cylindrical titanium casting, of the pouring mold is expanded in the radial direction; the thickness of the opening edge of the cylindrical titanium casting formed by casting is increased by at least 2mm; then the pouring mold and a pouring furnace are connected to form a pouring system, a plurality of reinforcing ribs are arranged at the opening position of the pouring mold, and reinforcing rib pouring channels connected with the pouring system are formed in the reinforcing ribs; and pouring molding is conducted in the pouring mold, the pouring mold is detached after cooling, the thickened part of the edge of the opening of the cylindrical titanium casting is machined, and then the large cylindrical titanium casting with the opening is obtained. The adverse effects of deformation and non-uniform shrinkage of the casting can be reduced, and subsequent repair welding treatment on the casting is effectively reduced.

Description

technical field [0001] The invention relates to the field of preparation of cylindrical titanium castings, in particular to a preparation method of a large cylindrical titanium casting with openings. Background technique [0002] Titanium alloys have high strength and specific strength, but have high viscosity, poor fluidity and poor thermal conductivity. Titanium alloy castings should not only consider mechanical properties, but also casting and welding performance; titanium alloy castings have coarse structure and looseness, inclusions and segregation. There are other casting defects, so there is a big difference between casting titanium alloys and processing titanium materials, and the mechanical properties of casting titanium alloys are lower and the plasticity is poorer. However, the heat resistance of cast titanium alloys is better. The use temperature of cast titanium alloys is higher than that of deformed titanium alloys. The industrially produced cast titanium alloy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/24B22C9/08
CPCB22C9/24B22C9/082B22D31/002
Inventor 刘喜波闫飞昊孙宏喆徐群刘茵琪
Owner LUOYANG SUNRUI TI PRECISION CASTING