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Preparation method of pin shaft for large medical equipment

A technology of medical equipment and pin shafts, which is applied in the field of preparation of pin shafts for large-scale medical equipment, can solve problems such as the influence of pin shaft performance and service life, and statistics that are not easy to digitize, and achieve excellent mechanical properties, good surface quality, The effect of meeting application needs

Active Publication Date: 2021-07-09
丁亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the face of the market demand for pins for medical equipment, there are still various differences in the use environment and maintenance level. These differences will have an impact on the performance and service life of the pins, and it is not easy to carry out data statistics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a pin for large medical equipment, the chemical composition of the pin blank is: C 0.42wt%, Si0.20wt%, Mn 0.55wt%, Cr 0.25wt%, Ni 0.01wt%, Al 0.01wt%, B 0.005wt%, S≤0.020wt%, P≤0.002wt%, the balance is iron and unavoidable impurities.

[0025] Include the following steps:

[0026] Step (1): Put the machined pin shaft into a heat treatment furnace, preheat to 30°C, and keep it warm for 30 minutes.

[0027] Step (2): Continue heating the preheated pin shaft to 800°C for 2 hours.

[0028] Step (3): Slowly cool the pin shaft with the furnace to 650°C, then take out the pin shaft from the heat treatment furnace and put it into the quenching device, and perform quenching treatment at -30°C for 15s.

[0029] Step (4): Reheat the cooled pin shaft for low-temperature tempering. The heating temperature is 350° C., the holding time is 2 hours, and the low-temperature tempering is repeated twice.

[0030] Step (5): surface-treating the heat-treated pin sha...

Embodiment 2

[0033] A method for preparing a pin for large medical equipment, the chemical composition of the pin blank is: C 0.45wt%, Si0.25wt%, Mn 0.55wt%, Cr 0.25wt%, Ni 0.02wt%, Al 0.01wt%, B 0.005wt%, S≤0.020wt%, P≤0.002wt%, the balance is iron and unavoidable impurities.

[0034] Include the following steps:

[0035] Step (1): Put the machined pin shaft into a heat treatment furnace, preheat to 350°C, and keep it warm for 25 minutes.

[0036] Step (2): Continue heating the preheated pin shaft to 820°C, and keep it for 2 hours.

[0037] Step (3): Slowly cool the pin shaft with the furnace to 680°C, then take the pin shaft out of the heat treatment furnace and put it into the quenching device, and perform quenching treatment at -50°C for 20s.

[0038] Step (4): Reheat the cooled pin shaft for low-temperature tempering. The heating temperature is 250° C., the holding time is 4 hours, and the low-temperature tempering is repeated 3 times.

[0039]Step (5): surface-treating the heat-tr...

Embodiment 3

[0042] A method for preparing a pin shaft for large medical equipment, the chemical composition of the pin blank is: C 0.55wt%, Si0.30wt%, Mn 0.60wt%, Cr 0.20wt%, Ni 0.02wt%, Al 0.02wt%, B 0.004wt%, S≤0.020wt%, P≤0.002wt%, the balance is iron and unavoidable impurities.

[0043] Include the following steps:

[0044] Step (1): Put the machined pin shaft into a heat treatment furnace, preheat to 400°C, and keep it warm for 30 minutes.

[0045] Step (2): Continue heating the preheated pin shaft to 830°C for 1 hour.

[0046] Step (3): Slowly cool the pin shaft with the furnace to 700°C, then take out the pin shaft from the heat treatment furnace and put it into the quenching device, using water-cooled spraying method, and the cooling time is 40s.

[0047] Step (4): Reheat the cooled pin shaft for low-temperature tempering. The heating temperature is 350° C., the holding time is 3 hours, and the low-temperature tempering is repeated twice.

[0048] Step (5): surface-treating the...

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PUM

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Abstract

The invention relates to a preparation method of a pin shaft for large-scale medical equipment. Through the improvement of the heat treatment process and the surface treatment process, the preparation process of tempering after segmental cooling and then special surface treatment is adopted to strictly control the temperature and temperature of heating, heat preservation and cooling. time, ensure the performance of the hardened layer of the product, and compare the influence of the alloy composition and the brightener composition on the pin shaft product, and obtain a pin shaft product for large-scale medical equipment with excellent mechanical properties and good surface quality, which can meet the application of medical device equipment parts need.

Description

technical field [0001] The invention relates to the field of metal processing, in particular to a method for preparing a pin shaft for large-scale medical equipment. Background technique [0002] The pin shafts used in equipment and machinery are currently the theoretical researchers, engineering technicians and colleges and universities in many aspects such as macroscopic force analysis, internal force distribution of pin shafts, fatigue life research of pin shafts, and pin shaft materials and manufacturing processes. Related theoretical research hotspots for teachers and students of related majors. In particular, medical equipment or devices have certain special requirements for operating accuracy, tolerance conditions and service life. In terms of pin force analysis, Zhu Hao et al. from Wuhan University of Technology studied the distribution of the contact force of the pin connection, and proposed that the ratio of the pin hole diameter to the thickness of the ear plate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D9/28C21D1/06C22C38/02C22C38/04C22C38/06C22C38/54C23F3/06
CPCC21D1/06C21D1/18C21D9/28C21D2211/005C21D2211/008C22C38/002C22C38/02C22C38/04C22C38/06C22C38/54C23F3/06
Inventor 丁亮其他发明人请求不公开姓名
Owner 丁亮