Technique method for manufacturing composite guide roller by molding and vacuum sintering of mold and mold therein
A process method and mold forming technology, applied in heating inorganic powder coating and other directions, can solve the problems of low space utilization rate of vacuum fusion furnace, and achieve the effect of reducing finishing allowance, reducing cost and improving utilization rate
Inactive Publication Date: 2012-10-31
王宇辉
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In this way, the space utilization rate of the vacuum sintering furnace is also relatively low
Method used
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[0058] The process for making composite material guide rollers with mold forming and vacuum sintering provided by the present invention comprises the following process steps:
[0059] A. According to the shape and size of the guide roller blank, a forming mold is provided. The forming mold is an upper and lower split structure, and the upper and lower mold split parts are a flat contact combination structure without clamping. There is a gap between the contours of the guard roller blank, which is the margin for filling the alloy powder;
[0060] B. Put the guide roller blank into the lower half of the molding die, and then buckle the upper half of the molding mold on the guide roller blank;
[0061] C. Fill the alloy powder used to form the surface hardened layer in the gap between the forming die and the guide roller blank through the filling hole reserved on the forming die; the alloy powder can be filled by vibration.
[0062] D. Put the forming mold containing the guide r...
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Abstract
The invention provides a technique method for manufacturing a composite guide roller by molding and vacuum sintering of a mold, comprising the following procedures and steps that: a guide roller blank is placed in the mold which is of an upper-lower split structure, and the split pieces are of plane contacting and bonding structures without clamping; a gap is left between a mold cavity and the blank and comprises allowance of filled alloy powder and size tolerance; the alloy powder used for forming a surface hardening layer is filled in the gap by filling holes of the mold; and the process of vacuum sintering is carried out, and then the blank is cooled and taken out of the furnace. The technique method communicates and places the mold and the blank into a vacuum sintering furnace for sintering, thus avoiding the alloy powder on the blank from flowing in a furnace hearth; more blanks can be densely arranged in the furnace hearth, thus effectively improving the utilization ratio of the furnace hearth. The technique method overcomes the defects of loss of raw materials, and greatly reduces the finish machining allowance of products, thus providing convenience for subsequent machining according to the final size, reducing the cost of the subsequent machining and further greatly reducing the production cost of the whole product. The invention also provides the mold.
Description
technical field [0001] The invention provides a sintering and compounding process for workpieces, in particular, it relates to a sintering process for setting a hardened layer on the surface of a guide roller, especially a process method for making a guide roller of composite material by mold forming and vacuum sintering. The invention also provides a mold for use in the method. Background technique [0002] The guide device is a device that supports and guides the red steel at the entrance and exit of the wire rod mill and bar mill. Due to the harsh operating environment, the guide roller becomes the main vulnerable part. At present, most steel mills use Cr12MoV and other materials to make guide rollers, but their service life is too low to meet the needs of normal production in steel mills; a few guide roller manufacturers also use various surface strengthening or surface compounding processes to make composite material guide rollers. The service life of the guard roller...
Claims
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IPC IPC(8): C23C24/08B22F7/04
Inventor 王宇辉
Owner 王宇辉