阅读说明：本技术 一种基于医疗用髋关节柄制坯件表面的优化工艺 (Optimization process for manufacturing blank surface based on medical hip joint handle ) 是由 李升峰 李湘军 李建军 何涛 于 2020-06-29 设计创作，主要内容包括：本发明提供了一种基于医疗用髋关节柄制坯件表面的优化工艺,其能去除产品表面石墨残留,从而减少麻点、粗糙、颗粒状附着物等表面缺陷,提高产品质量。其包括以下步骤：步骤一：使用履带式钢砂抛丸机对锻件进行表面处理；步骤二：将经过步骤一处理的锻件放入硝酸和氢氟酸的混合溶液中进行表面处理。(The invention provides an optimized process for manufacturing the blank surface based on a medical hip joint handle, which can remove graphite residues on the product surface, thereby reducing surface defects such as pits, roughness, granular attachments and the like and improving the product quality. Which comprises the following steps: the method comprises the following steps: performing surface treatment on the forge piece by using a crawler-type steel sand shot blasting machine; step two: and (4) putting the forged piece treated in the step one into a mixed solution of nitric acid and hydrofluoric acid for surface treatment.)

1. An optimized process for manufacturing a blank surface based on a medical hip joint handle is characterized by comprising the following steps: the method comprises the following steps: performing surface treatment on the forge piece by using a crawler-type steel sand shot blasting machine; step two: and (4) putting the forged piece treated in the step one into a mixed solution of nitric acid and hydrofluoric acid for surface treatment.

2. The optimized process for manufacturing a blank surface based on a medical hip joint stem according to claim 1, wherein the optimized process comprises the following steps: the shot blasting capacity of the crawler-type steel sand shot blasting machine is 120 kg/min.

3. The optimized process for manufacturing a blank surface based on a medical hip joint stem according to claim 1, wherein the optimized process comprises the following steps: the treatment temperature of the second step is 30-50 ℃.

4. The optimized process for manufacturing a blank surface based on a medical hip joint stem according to claim 3, wherein: the content of the nitric acid is 120 g/L-180 g/L; the content of hydrofluoric acid is 180 g/L-220 g/L.

5. The optimized process for manufacturing a blank surface based on a medical hip joint stem according to claim 4, wherein the optimized process comprises the following steps: the volume ratio of the nitric acid to the hydrofluoric acid is 1.5: 1-2.5: 1.

6. The optimized process for manufacturing a blank surface based on a medical hip joint stem according to claim 5, wherein the optimized process comprises the following steps: the treatment time of the second step is 1min-2 min.

Technical Field

The invention relates to the technical field of surface treatment, in particular to an optimization process for manufacturing a blank surface based on a medical hip joint handle.

Background

Artificial joints have been around a century old from design to application, with artificial hip joints being the most widely used class. With the development of medicine, the demand of artificial hip joints is increasing. The artificial hip joint consists of a hip joint handle part, a mortar cup and a liner, wherein the hip joint handle part is mainly forged by high-nitrogen stainless steel, titanium alloy, cobalt-chromium-molybdenum alloy, high-temperature alloy and the like. However, graphite remains on the surface of the product during forging of the hip joint stem piece, so that the surface of the workpiece cannot be contacted with chemical milling liquid or corrosive liquid, surface defects such as pits, roughness, granular attachments, wavy pattern protrusions and the like appear on the surface of the product, and the appearance and the use of the product are seriously affected.

Disclosure of Invention

Aiming at the problem that the graphite residue on the surface of a product in the forging process of a hip joint stem piece causes the surface of a workpiece part to be incapable of chemical milling or corrosion treatment, the invention provides an optimization process based on the surface of a medical hip joint stem blank, which can remove the graphite residue on the surface of the product, thereby reducing the surface defects of pits, rough and granular attachments and the like and improving the product quality.

The technical scheme is as follows: an optimized process for manufacturing a blank surface based on a medical hip joint handle is characterized by comprising the following steps: the method comprises the following steps: performing surface treatment on the forge piece by using a crawler-type steel sand shot blasting machine; step two: and (4) putting the forged piece treated in the step one into a mixed solution of nitric acid and hydrofluoric acid for surface treatment.

It is further characterized in that:

the shot blasting capacity of the crawler-type steel sand shot blasting machine is 120 kg/min;

the treatment temperature of the second step is 30-50 ℃;

the content of the nitric acid is 120 g/L-180 g/L; the content of hydrofluoric acid is 180 g/L-220 g/L;

the volume ratio of the nitric acid to the hydrofluoric acid is 1.5: 1-2.5: 1;

the treatment time of the second step is 1min-2 min.

The invention has the beneficial effects that: the invention removes the residual graphite lubricant existing on the surface of the product by changing the shot blasting mode and the surface treatment mode, reduces the defects of pockmarks, roughness, granular attachments and the like on the surface of the product, improves the surface quality of the product, increases the competitiveness of the product and optimizes the production process.

Detailed Description