Heat treatment tooling for a copper-steel double alloy blank
A technology of double alloy and blank parts, applied in the field of hydraulic pumps, can solve the problems of low pass rate of heat treatment of blank parts, large difference in thermal expansion coefficient, separation of copper layer and steel layer, etc., to achieve easy reusability, reduce tensile stress, The effect of high pass rate
Active Publication Date: 2021-02-19
AVIC LIYUAN HYDRAULIC
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Problems solved by technology
During the heat treatment of the blank, due to the large difference in thermal expansion coefficient between the copper layer and the steel layer, the rapid cooling of the blank will cause a large tensile stress on the end face of the copper layer and the joint surface between the copper layer and the steel layer, which may cause The copper layer of the blank is cracked or the copper layer is separated from the steel layer, and the pass rate of the heat treatment of the blank is low, only about 30%.
[0003] Therefore, direct heat treatment of blanks has the disadvantage of low pass rate
Method used
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Embodiment 1
[0015] Example 1. A heat treatment tooling for a copper-steel double alloy blank, such as figure 1 As shown, a base 1 is included, a blind hole 2 is provided on the base 1 , a heat insulating gasket 3 is provided in the blind hole 2 , and a fixing structure 4 is provided on the base 1 .
[0016] The heat insulating pad 3 is an asbestos pad.
[0017] The thickness of the heat insulating gasket 3 is 3, 5 or 8 mm, and the diameter of the heat insulating gasket 3 is close to the inner diameter of the blind hole 2 .
[0018] The fixing structure 4 is an internal thread provided on the inner wall of the blind hole 2 .
[0019] A pin hole is provided on the peripheral surface of the base 1 .
[0020] When the above tooling is used for the heat treatment of the blank of the YZBXX-3005 double alloy rotor in the hydraulic pump (the material of the copper layer in the blank is QSn6.5-0.1, and the material of the steel layer is 40CrNiMoA), the end of the blank with the copper layer is ...
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Abstract
The invention discloses a heat treatment tool for copper steel dual alloy roughcasts. The heat treatment tool comprises a base (1), wherein a blind hole (2) is formed in the base (1), a heat insulation pad (3) is arranged in the blind hole, and a fixing structure (4) is arranged on the base (1); the heat insulation pad (3) adopts an asbestos pad; the thickness of the heat insulation pad (3) is 3 to 8 mm; and the fixing structure (4) adopts internal threads formed in the inner wall of the blind hole (2). The roughcasts treated through the heat treatment tool provided by the invention has the advantage of high qualification rate, and has the advantages of simplicity in processing, easiness in mounting and reusability.
Description
technical field [0001] The invention belongs to the field of hydraulic pumps, and in particular relates to a heat treatment tool for a copper-steel double alloy blank for a hydraulic pump. Background technique [0002] Copper-steel double-alloy parts refer to parts made of copper-steel double-alloy material, which is a material made of a combination of a thinner copper layer and a thicker steel layer. Copper-steel double alloy parts are widely used in hydraulic pumps (also known as hydraulic motors), and are mainly used in the friction parts of hydraulic pumps. While having high strength, they also have good abrasion resistance and resistance fatigue. When producing copper-steel double-alloy parts, it is necessary to process the blank with copper-steel double-alloy material first, and then directly heat-treat the blank (quenching treatment, rapid cooling after heating) to increase the strength of the steel layer of the blank, and finally the blank Finished parts are finish...
Claims
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IPC IPC(8): C21D9/00C22F1/08
CPCC21D9/0068C22F1/08
Inventor 唐江滕海山陈杰吴小芳石登明
Owner AVIC LIYUAN HYDRAULIC