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Method for processing special-shaped SKD11 part

A processing method and part technology, applied in the processing field of special-shaped SKD11 parts, can solve the problems of high hardness of SKD11, difficult to ensure quality, difficult processing, etc., and achieve the effects of good mechanical properties, uniform internal structure and cost reduction.

Inactive Publication Date: 2015-09-16
上海精科智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the powder compaction molding process, signal transmitters for communication, notebook shafts, auto parts, etc. are special-shaped parts, which are not easy to make the product density uniform. Difficult, costly and difficult to guarantee quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In the embodiment of the present invention, a processing method of special-shaped SKD11 parts, the specific steps include:

[0017] A, the preparation process of binder: the raw material by weight percentage comprises: polypropylene 10%, polyethylene 40%, stearic acid 10%, paraffin 40%, polypropylene, polyethylene, active agent and paraffin are placed in mixing In the feeder, mix at 140°C for 1 hour;

[0018] B. Ingredients: Weigh the binder and SKD11 powder according to the volume ratio of 48:52, put them in the mixer, and mix them at 140°C for 4 hours to prepare the ingredients;

[0019] C. Injection molding: put the above ingredients in an injection molding machine, and process it into a blank under the conditions of a molding temperature of 160°C, an injection pressure of 40MPa, and a mold temperature of 30°C;

[0020] D. Degreasing: first put the blank in trichlorethylene and heat it to 40°C, stay for 6 hours to dissolve the paraffin in the binder, then put the bl...

Embodiment 2

[0023] In the embodiment of the present invention, a processing method of special-shaped SKD11 parts, the specific steps include:

[0024] A. The preparation process of the binder: the raw materials by weight percentage include: polypropylene 40%, polyethylene 20%, active agent 1%, paraffin wax 39%, polypropylene, polyethylene, active agent and paraffin wax are placed in the mixture In the machine, mix at 160°C for 2 hours;

[0025] B. Ingredients: Weigh the binder and SKD11 powder according to the volume ratio of 50:60, put them in the mixer, and mix them at 160°C for 4 hours to prepare the ingredients;

[0026] C. Injection molding: put the above ingredients in an injection molding machine, and process it into a blank under the conditions of a molding temperature of 180°C, an injection pressure of 80MPa, and a mold temperature of 60°C;

[0027] D. Degreasing: first put the blank in trichlorethylene and heat it to 60°C, stay for 6 hours to dissolve the paraffin in the binder...

Embodiment 3

[0030] In the embodiment of the present invention, a processing method of special-shaped SKD11 parts, the specific steps include:

[0031] A. The preparation process of the binder: the raw materials by weight percentage include: 40% polypropylene, 40% polyethylene, 10% active agent, and 10% paraffin wax. Polypropylene, polyethylene, active agent and paraffin wax are placed in the mixture In the machine, mix at 145°C for 3 hours;

[0032] B. Ingredients: Weigh the binder and SKD11 powder according to the volume ratio of 48.5:54, put them in the mixer, and mix them at 145°C for 4 hours to prepare the ingredients;

[0033] C. Injection molding: put the above ingredients in an injection molding machine, and process it into a blank under the conditions of a molding temperature of 165°C, an injection pressure of 50MPa, and a mold temperature of 40°C;

[0034] D. Degreasing: first put the blank in trichlorethylene and heat it to 45°C, stay for 6 hours to dissolve the paraffin in the...

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PUM

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Abstract

The invention discloses a method for machining a special-shaped SKD11 part. A binding agent and SKD11 powder are put in a blender mixer to be mixed into ingredients. Injection moulding, degreasing and sintering are carried out. The binding agent comprises, by weight, 10 percent to 40 percent of polypropylene, 10 percent to 40 percent of polyethylene, one percent to ten percent of active agents and 10 percent to 40 percent of paraffin. The polypropylene, the polyethylene, the active agents and the paraffin are put in the blender mixer and mixed for one to four hours at the temperature of 140 DEG C to 160 DEG C to obtain the binding agent. The manufactured part is even in internal organization, the density can be 98 percent to 99.5 percent, the mechanical property is good, dimensional accuracy is high, surface smoothness is good, one-time forming is achieved, post machining is not needed, and cost is greatly lowered.

Description

technical field [0001] The invention relates to the field of steel materials, in particular to a processing method for special-shaped SKD11 parts. Background technique [0002] SKD11 is a general cold work die steel with high wear resistance and toughness, high carbon and high chromium alloy tool steel and vacuum degassed refined steel. The steel is pure, has good hardenability and good hardenability with small quenching deformation. The steel has been softened by spheroidizing annealing, and has good machinability, and the carbide particles are fine and uniform, so there is no need to worry about the special addition of molybdenum and vanadium, which are strengthening elements of quenching and cracking. Signal transmitters for communication, notebook shafts, and auto parts are all special-shaped SKD11 parts, which require uniform density and high dimensional accuracy. Using the powder compaction molding process, signal transmitters for communication, notebook shafts, auto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F1/00
Inventor 宋金帅
Owner 上海精科智能科技股份有限公司