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Rotary Spray Quenching Technology of High Chromium Wear-resistant Iron Castings

A technology of wear-resistant cast iron and rotating spray, which is applied in the field of casting quenching, can solve the problems that the surface wear resistance of high-chromium castings cannot be guaranteed, the uniformity of quenching temperature of workpieces cannot be guaranteed, time-consuming and labor-intensive, etc.

Active Publication Date: 2020-07-07
宜昌楚疆铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) During the quenching process, only one side or part of the workpiece on the workbench can be cooled, and multiple sides or the whole can not be cooled at the same time. The workpiece quenching process can only be realized by artificially changing the cooling direction of the workpiece. The operation process consumes Time-consuming and laborious, and the cooling quality cannot be guaranteed
[0004] (2) During the quenching process, the uniformity of the quenching temperature of each part of the workpiece cannot be guaranteed, and internal stress will be generated inside the workpiece during cooling. When it reaches a certain level, the workpiece will be distorted, deformed or even cracked
[0005] (3) During the quenching process, especially for large castings, the entire casting to be quenched is usually placed in a pool filled with water for quenching. The above quenching process cannot guarantee a good control of the quenching temperature curve, which in turn affects The quenching effect of castings cannot be guaranteed, and the surface wear resistance of high chromium castings cannot be guaranteed

Method used

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  • Rotary Spray Quenching Technology of High Chromium Wear-resistant Iron Castings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A rotary spray quenching process for high chromium wear-resistant iron castings, which includes the following steps:

[0037] Step 1: Place the cast workpiece 1 to be quenched in a high-temperature furnace to heat up to a temperature of 1000°C and keep it warm for 3.5 hours;

[0038] The second step: placing the high-temperature casting workpiece 1 in the first step on the rotary table 2;

[0039] The third step: start the rotary table 2, and drive the casting workpiece 1 to rotate at a high speed through the rotary table 2;

[0040] The fourth step: start the spray device 3 located on the side of the rotary table 2; and supply water to the spray device 3 through the water supply device 4 and the water supply pipe 5;

[0041] Step 5: Spray the atomized water to the surface of the rotating casting workpiece through the spray device 3, and perform quenching treatment on the casting workpiece, wherein the air volume of the fan of the spray device 3 is controlled at 31500 ...

Embodiment 2

[0046] A rotary spray quenching process for high chromium wear-resistant iron castings, which includes the following steps:

[0047] Step 1: Place the cast workpiece 1 to be quenched in a high-temperature furnace to heat up to 1050°C, and keep it warm for 3.5 hours;

[0048] The second step: placing the high-temperature casting workpiece 1 in the first step on the rotary table 2;

[0049] The third step: start the rotary table 2, and drive the casting workpiece 1 to rotate at a high speed through the rotary table 2;

[0050] The fourth step: start the spray device 3 located on the side of the rotary table 2; and supply water to the spray device 3 through the water supply device 4 and the water supply pipe 5;

[0051] Step 5: Spray the atomized water to the surface of the rotating casting workpiece through the spray device 3, and perform quenching treatment on the casting workpiece, wherein the air volume of the fan of the spray device 3 is controlled at 31500 m³ / h and lasts f...

Embodiment 3

[0055] A rotary spray quenching process for high chromium wear-resistant iron castings, which includes the following steps:

[0056] Step 1: Place the cast workpiece 1 to be quenched in a high-temperature furnace to heat up to a temperature of 1050°C and keep it warm for 4.5 hours;

[0057] The second step: placing the high-temperature casting workpiece 1 in the first step on the rotary table 2;

[0058] The third step: start the rotary table 2, and drive the casting workpiece 1 to rotate at a high speed through the rotary table 2;

[0059] The fourth step: start the spray device 3 located on the side of the rotary table 2; and supply water to the spray device 3 through the water supply device 4 and the water supply pipe 5;

[0060] Step 5: Spray the atomized water to the surface of the rotating cast workpiece through the spray device 3, and perform quenching treatment on the cast workpiece. The wind pressure is controlled at 800Mpa, so that the temperature of the cast workp...

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Abstract

The invention provides a high-chromium wear resistant casting iron part rotary spraying quenching process. The high-chromium wear resistant casting iron part rotary spraying quenching process comprises the following steps that the first step, a casting workpiece to be quenched is placed inside a high-temperature furnace to be heated to raise the temperature, and heat preservation is performed fora while; the second step, the high-temperature casting workpiece in the first step is placed on a rotary workbench; the third step, the rotary workbench is started, and the casting workpiece is drivenby the rotary workbench to rotate at high speed; the fourth step, spraying devices located on the side surfaces of the rotary workbench are started, and water is supplied for the spraying devices through a water supplying device and water supplying pipes; the fifth step, the water after atomization is sprayed to the surface of the rotating casting workpiece through the spraying devices, and rapidcooling treatment is performed on the casting workpiece; the sixth step, the casting workpiece after rapid cooling treatment in the fifth step is transferred onto an air cooling rack; the seventh step, an air cooling device is started, and the casting workpiece after rapid cooling treatment is cooled through the air cooling device. By means of the high-chromium wear resistant casting iron part rotary spraying quenching process, the surface wear resistant performance of high-chromium casting parts is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of casting quenching, and in particular relates to a rotary spray quenching process for high-chromium wear-resistant cast iron, which is suitable for quenching the outer surface of high-chromium wear-resistant cast iron. Background technique [0002] Quenching is to dip the hot workpiece heated to a certain degree into the medium to improve the strength, hardness, wear resistance, fatigue strength and toughness of the steel, so as to meet the different requirements of various mechanical parts and tools. It can also meet the special physical and chemical properties of some special steels such as ferromagnetism, corrosion resistance and wear resistance through quenching. Therefore, the quenching process is widely used. At present, in the quenching process of the workpiece, most of them still use manual control of the quenching process conditions or manually change the quenching surface of the workpiece. This ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/18C21D1/60
CPCC21D1/18C21D1/60
Inventor 孙宜华敖来远黄龙汪涛王瑞
Owner 宜昌楚疆铸造有限公司
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