Processing technology of molded surface of high-strength wear-resistant titanium alloy forging mold
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A mold surface and processing technology technology, which is applied in the field of high-strength wear-resistant titanium alloy forging mold surface processing technology, can solve the problems of affecting the service life of the device, long production cycle of forging die, uneven organizational structure, etc., to improve the use of Effects of life, improvement of hardness, and improvement of cutting performance
Active Publication Date: 2019-04-26
MAANSHAN CITY ZHONGYE MACHINERY
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Problems solved by technology
[0003] The traditional processing technology of the forging model surface is directly machined from the blank, and the blank is mass-produced. Although the factory does annealing before production, the internal grains are large and the structure is uneven. Due to There is a large internal stress in the blank, and there will be hidden dangers of cracking in the later heat treatment of the profile, resulting in a waste of resources
Even if the processing of the profile is completed, there will be hidden dangers of cracking and collapse when the working surface is processed, which will affect the service life of the device
The selection of the structural surface of the existing surfacing layer is insufficient, and there is a large stress deformation, which eventually leads to the service life of the working surface
The existing forging die has a long production cycle and low die utilization rate, which greatly increases the production cost
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Embodiment 1
[0044] Embodiment 1: Select the base material of the mold and select 56NiCrMoV7 material.
[0045] Step 1: Pretreatment of mold base material
[0046] Carry out spheroidizing annealing treatment on the mold base 100, heat it to 720°C for 4 hours, then slowly cool it to 550°C at a rate of 20°C per hour, and then air cool to room temperature;
[0047] Step 2: Machining
[0048] The shape and depth of the welding layer are milled on the mold base 100, and the welding layer is processed into a stepped structure that gradually decreases from the center of the working surface to the surroundings, which can increase the contact area between the mold base and the welding layer, and is conducive to improving the welding layer. hardness, strength and wear resistance;
[0049] Step 3: Heat treatment before welding
[0050] Pre-weld heat treatment is performed on the mold base 100, followed by stress relief, quenching and tempering processes:
[0051] S1. Perform high-temperature temp...
Embodiment 2
[0070] The difference with embodiment 1 is:
[0071] The sixth surfacing layer 201 , the fifth surfacing layer 202 , the fourth surfacing layer 203 , the third surfacing layer 204 , the second surfacing layer 205 and the first surfacing layer 206 are all vertically connected to the mold base 100 .
[0072] The thickness of the welding layers from the sixth welding overlay layer 201 to the first welding overlay layer 206 increases step by step.
[0073] The thicknesses of the welding layers from the seventh welding overlay layer 301 to the twelfth welding overlay layer 302 increase step by step.
[0074] The gradual increase in the thickness of the welding layer is beneficial to the stress of the twelfth surfacing layer 306 to the seventh surfacing layer 301 when working on the working face in the later stage, so as to prevent excessive stress deformation from affecting the use of the mold.
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Abstract
The invention discloses a processing technology of a molded surface of a high-strength wear-resistant titanium alloy forging mold, and belongs to the field of high alloy material forging mold processing. The processing technology comprises the following step of: step 1. pretreating a mold base material; step 2. machining, to be specific, milling the depth and shape of a welding layer on the mold base material, and processing a welding layer surface into a stepped shape decreasing from the highest point of a working face to a low point; step 3. carrying out pre-weld heat treatment, to be specific, carrying out heat treatment on the base material; step 4. carrying out build-up welding on the working face, carrying out subdivision build-up welding on the molded surface of the forging mold working face by adopting a radial welding unit, annularly and radially welding from the center to the periphery; step 5. carrying out post-weld heat treatment, to be specific, carrying out post-weld heattreatment on the mold subjected to build-up welding; and step 6. carrying out numerical control machining and polishing, machining a cavity of the forging mold, and grinding the working face. The processing technology improves the performance of the forging mold, and prolongs the service life of the forging mold. According to the particularity of a forged product, the radial welding process is adopted to improve the stability of the working face and reduce the abrasion of the forging mold.
Description
technical field [0001] The invention belongs to the technical field of hard alloy production, and in particular relates to a high-strength and wear-resistant titanium alloy forging mold surface processing technology. Background technique [0002] The forging die is a tool for hot die forging. The cavity of the forging die is made into the corresponding shape opposite to the concave and convex of the required forging, and the appropriate parting is made. Heat the forging blank to the forging temperature range above the recrystallization temperature of the metal, put it on the segment die, and then use the pressure of the forging equipment to forge the blank into a forging with flash or very small flash. Forging dies process metals under high temperature conditions, and the working conditions are poor. They need to withstand repeated impact loads and alternating effects of cold and heat, resulting in high stress. There will also be a friction effect when the metal flows, so ...
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Application Information
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