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A wear-resistant pin and its processing method

A wear-resistant pin and pin shaft technology, applied in the direction of bolts, etc., can solve the problems of short service life, insufficient toughness, affecting the working efficiency of the pin shaft, etc., and achieve the effect of long service life, good plasticity and toughness, and improved cold working performance.

Active Publication Date: 2017-01-11
宁波瑞国精机工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pin shafts in the prior art generally have high hardness and high strength and insufficient plasticity and toughness, so the service life is short, which seriously affects the working efficiency of the pin shafts.

Method used

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  • A wear-resistant pin and its processing method
  • A wear-resistant pin and its processing method
  • A wear-resistant pin and its processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0038] Weigh the raw materials according to the composition and mass percentage of the wear-resistant pin described in Example 1 in Table 1, crush and refine the raw materials into metal powders, and carry out pre-annealing treatment at 760°C under hydrogen or vacuum conditions, annealing treatment The temperature is 770°C, the annealing treatment time is 4.5 hours, the oil is cooled to 500°C and air-cooled, and the small particle powder is made into large particles or pellets after blending;

[0039] Put the above-prepared large particles or aggregate powder into the mold cavity, and roll it into a pin blank under a pressure of 500MPa;

[0040] Quenching the above-prepared pin blank with quenching oil at 850°C, heat preservation for 2 hours, oil cooling to room temperature, then tempering at 520°C, heat preservation for 2 hours; air cooling to obtain the crude pin;

[0041] After the crude product of the above-mentioned pin shaft is rough-turned and finished-turned on the lat...

Embodiment 2

[0044] Weigh the raw materials according to the composition and mass percentage of the wear-resistant pin described in Example 2 in Table 1, crush and refine the raw materials into metal powder, and carry out pre-annealing treatment at 770°C under hydrogen or vacuum conditions, annealing treatment The temperature is 765°C, the annealing treatment time is 4.5 hours, the oil is cooled to 480°C and air-cooled, and the small particle powder is made into large particles or pellets after blending;

[0045] Put the large particle or aggregate powder obtained above into the mold cavity, and roll it into a pin blank under a pressure of 510MPa;

[0046] Quenching the above-prepared pin blank with quenching oil at 855°C, heat preservation for 2 hours, oil cooling to room temperature, then tempering at 510°C, heat preservation for 2 hours; air cooling to obtain the crude pin;

[0047] After the crude product of the above-mentioned pin shaft is rough-turned and finished-turned on the lathe...

Embodiment 3

[0050] Weigh the raw material according to the composition and mass percentage of the wear-resistant pin described in Example 3 in Table 1, crush and refine the raw material into metal powder, and carry out pre-annealing treatment at 750 ° C under hydrogen or vacuum conditions, annealing treatment The temperature is 780°C, the annealing treatment time is 4 hours, the oil is cooled to 550°C and air-cooled, and the small particle powder is made into large particles or pellets after blending;

[0051] Put the large particle or aggregate powder prepared above into the mold cavity, and roll it into a pin blank under a pressure of 480MPa;

[0052] Quenching the pin blank prepared above with quenching oil at 840°C, heat preservation for 3 hours, oil cooling to room temperature, then tempering at 500°C, heat preservation for 3 hours; air cooling to obtain the crude pin;

[0053] After the crude product of the above-mentioned pin shaft is rough-turned and finished-turned on the lathe, ...

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Abstract

The invention belongs to the technical field of pin shaft machining, and relates to a wear-resisting pin shaft and a machining method thereof. The wear-resisting pin shaft and the machining method thereof solve the problems that an existing pin shaft is low in strength and hardness. The wear-resisting pin shaft is formed by machining wear-resisting pin shaft steel which is composed of, by mass, 0.38%-0.45% of C, 1.0%-1.2% of Mn, 0.8%-1.1% of Cr, 0.20%-0.35% of Si, not larger than 0.25% of Ni, not larger than 0.025% of S, smaller than 0.025% of P, 0.3%-0.5% of Mo, 0.2%-0.5% of V, and the balance Fe. The wear-resisting pin shaft has the advantages of being high in strength and hardness.

Description

technical field [0001] The invention relates to a pin shaft and a processing method thereof, in particular to a wear-resistant pin shaft and a processing method thereof, belonging to the technical field of bolt processing. Background technique [0002] The hinge pins of construction machinery are widely used. The connection between the frame and the frame, the connection between the frame and the working device, and the connection between the independent parts of the working device all use the hinge pin. However, there is no uniform design standard for the pin structure at present, so in the actual design of the pin structure, different models, different designers, the designed pin structures vary widely, and the use effect is not ideal. [0003] In order to reduce the labor intensity of the pin shaft and improve the working efficiency, in the prior art, there are designed and produced self-lubricating pin shafts, and there are also link pin shafts designed to be easy to dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00F16B19/02C22C38/24C22C38/46
CPCB23P15/00C22C38/24C22C38/46F16B19/02
Inventor 张书麟
Owner 宁波瑞国精机工业有限公司
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