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Water-based quenching equipment and quenching method for phi76.2mm steel balls made of GCr15SiMn steel

A technology of water-based quenching and water-based quenching agent, applied in the direction of quenching agent, quenching device, heat treatment equipment, etc., to achieve the effect of ensuring the heart tissue, improving the hardness of the heart, and cooling uniformly

Inactive Publication Date: 2019-01-08
LUOYANG LYC BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface hardness after oil quenching and alkaline water quenching can meet the technical requirements, but the hardness of the core is HRC52~54, which does not meet the technical requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Bearing part model: φ76.2mm steel ball, material: GCr15SiMn. 500 capsules. Technical requirements: surface hardness HRC60~64, core hardness ≥HRC57.

[0020] GCr15SiMn steel Ф76.2mm water-based quenching method, the heat treatment quenching and tempering equipment is a pit furnace, and the quenching cooling medium is water-based quenching liquid (ZHY-101 water-based quenching agent and water from Dalian Sanjin Lubricating Oil Co., Ltd. 1:1 ratio solution), the medium temperature is 40°C. Its implementation steps are as follows:

[0021] 1. Loading: The steel balls are evenly scattered on the flat tray, and the number of layers is one layer;

[0022] 2. Pit furnace heating: heating temperature 810°C, heating time 180min;

[0023] 3. Quenching and cooling in the quenching tank: After the steel ball is heated, it is lifted out together with the material tray, and put into the quenching tank for cooling. The operation time from the furnace to quenching into the water-ba...

Embodiment 2

[0028] Bearing part model: φ76.2mm steel ball, material: GCr15SiMn. 800 capsules. Technical requirements: surface hardness HRC60~64, core hardness ≥HRC57.

[0029] GCr15SiMn steel Ф76.2mm water-based quenching method, the heat treatment quenching and tempering equipment is a pit furnace, and the quenching cooling medium is water-based quenching liquid (ZHY-101 water-based quenching agent and water from Dalian Sanjin Lubricating Oil Co., Ltd. 1:1 ratio solution), the medium temperature is 30°C. Its implementation steps are as follows:

[0030] 1. Loading: The steel balls are evenly scattered on the flat tray, and the number of layers is one layer;

[0031] 2. Pit furnace heating: heating temperature 805°C, heating time 175min;

[0032] 3. Quenching and cooling in the quenching tank: After the steel ball is heated, it is lifted out together with the material tray, and put into the quenching tank for cooling. The operation time from the furnace to quenching into the water-ba...

Embodiment 3

[0037] Bearing part model: φ76.2mm steel ball, material: GCr15SiMn. 800 capsules. Technical requirements: surface hardness HRC60~64, core hardness ≥HRC57.

[0038] GCr15SiMn steel Ф76.2mm water-based quenching method, the heat treatment quenching and tempering equipment is a pit furnace, and the quenching cooling medium is water-based quenching liquid (ZHY-101 water-based quenching agent and water from Dalian Sanjin Lubricating Oil Co., Ltd. 1:1 ratio solution), the medium temperature is 45°C. Its implementation steps are as follows:

[0039] 1. Loading: The steel balls are evenly scattered on the flat tray, and the number of layers is one layer;

[0040] 2. Pit furnace heating: heating temperature 815°C, heating time 190min;

[0041] 3. Quenching and cooling in the quenching tank: After the steel ball is heated, it is lifted out together with the material tray, and put into the quenching tank for cooling. The operation time from the furnace to quenching into the water-ba...

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Abstract

The invention discloses water-based quenching equipment and a water-based quenching method for phi76.2mm steel balls made of GCr15SiMn steel. By the water-based quenching method for the phi76.2mm steel balls made of the GCr15SiMn steel, water-based quenching liquid obtained through reasonable formulation of a water-based quenching agent and water is used as a cooling medium to control the steel ball quenching cooling time and the liquid discharging temperature, and for such steel balls with relatively large specifications, the core cooling rate can be obviously increased, the core structure isguaranteed and the core hardness is improved.

Description

technical field [0001] The invention relates to the technical field of bearing heat treatment, in particular to water-based quenching equipment and a quenching method for φ76.2mm steel balls made of GCr15SiMn steel. Background technique [0002] After heat treatment and quenching, the surface hardness and structure of the steel ball can easily meet the technical standard requirements, while the hardness and structure of the core will show differences with the size of the steel ball. With the development of the wind power market, users have put forward higher requirements for product quality. The GCr15SiMn steel ball with a specification of Ф76.2mm is the type used by a wind power bearing user. The technical conditions require that the surface hardness is HRC60~64, and the core hardness is ≥HRC57. The surface hardness after oil quenching and alkaline water quenching can meet the technical requirements, but the core hardness is HRC52~54, which does not meet the technical requ...

Claims

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Application Information

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IPC IPC(8): C21D9/36C21D1/62C21D1/18C21D1/60
Inventor 王珂龚建勋陈卉珍张中文周鹏龙郝奥玄韩万顺王旗卫王红伟倪滨昆
Owner LUOYANG LYC BEARING
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