Unlock instant, AI-driven research and patent intelligence for your innovation.

Die steel laser additive repairing and PVD coating strengthening method

A technology of laser additive and die steel, which is used in the coating process of metal materials, coating, coating of superimposed layers, etc.

Pending Publication Date: 2021-03-23
FOSHAN UNIVERSITY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on PVD coating strengthening on the surface of laser additive repaired die steel has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Die steel laser additive repairing and PVD coating strengthening method
  • Die steel laser additive repairing and PVD coating strengthening method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take Cr12MoV steel as an example.

[0020] Step 1: Pretreatment of the surface of the Cr12MoV steel mold to be repaired, including machining, cleaning, sandblasting and drying of the area to be repaired;

[0021] Step 2: Use the laser additive repair process to repair the mold, and the process parameters are as follows: laser power is 1700W, scanning speed is 17mm / s, spot diameter is 5mm, powder feeding amount is 26g / min, and overlapping amount is 50%;

[0022] Step 3: Carry out subsequent machining on the surface of the repaired mold to restore the size and precision of the mold, and then perform sandblasting and ultrasonic cleaning;

[0023] Step 4: Put the repaired mold into the PVD furnace for argon ion cleaning;

[0024] Step 5: Carry out PVD coating, the parameters are as follows: the vacuum degree is adjusted to 2.2-2.5 Pa, the bias voltage is -100 V, nitrogen gas is introduced, the air pressure is 3.6 Pa, the temperature is controlled at 450 ° C, the target is ...

Embodiment 2

[0029] Take H13 steel as an example.

[0030] Step 1: Perform pretreatment on the surface of the 40Cr steel mold to be repaired, including machining, cleaning, sandblasting and drying of the area to be repaired;

[0031] Step 2: Use the laser additive repair process to repair the mold, and the process parameters are as follows: laser power is 1900W, scanning speed is 17mm / s, spot diameter is 4.8mm, powder feeding amount is 29g / min, and overlapping amount is 50% ;

[0032] Step 3: Carry out subsequent machining on the surface of the repaired mold to restore the size and precision of the mold, and then perform sandblasting and ultrasonic cleaning;

[0033] Step 4: Put the repaired mold into the PVD furnace for argon ion cleaning;

[0034] Step 5: Carry out PVD coating, the parameters are as follows: the vacuum degree is adjusted to 2.4 Pa, the bias voltage is -110 V, nitrogen gas is introduced, the air pressure is 3.5 Pa, the temperature is controlled at 465 ° C, the target is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Average hardnessaaaaaaaaaa
Average hardnessaaaaaaaaaa
Average hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a die steel laser additive repairing and PVD coating strengthening method. Firstly, the surface of a die to be repaired is pretreated, including machining, cleaning, sand blasting and drying of an area to be repaired; a laser additive repair process is adopted for repairing the die, wherein the process parameters are shown as follows: the laser power is 1500-2000W, the scanning speed is 15-18 mm / s, the spot diameter is 4-6 mm, the powder feeding amount is 25-30 g / min, and the amount of overlap is 50%; the surface of the repaired die is subjected to subsequent machining,sand blasting and ultrasonic cleaning; the die is placed into a PVD furnace for argon ion cleaning, then target material are opened, nitrogen is introduced, and a PVD hard film is deposited; a die steel additive repair part with a high-hardness and wear resistance surface is obtained, and the surface hardness of the die can reach 2500 HV; and the wear resistance is improved by about 5 times.

Description

technical field [0001] The invention relates to the field of laser metal material processing, in particular to a laser additive repair and PVD coating strengthening method for mold steel. Background technique [0002] Mold is known as the "mother of industry" and is widely used in machinery, automobiles, aviation, military industry, energy and other fields. During the service process, the mold is subject to complex thermal cycle, which is prone to wear, cracks, fatigue, etc., which will lead to mold failure, affect product quality, and even lead to production stoppage, causing serious economic losses. Additive remanufacturing technology is based on digital model-driven metal additive repair technology, which can repair and upgrade worn or failed molds. Laser additive remanufacturing technology is one of the most popular green remanufacturing technologies at present. It uses high-energy beam laser as the heat source and has the characteristics of low heat input, small diluti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C28/00C23C24/10C23C14/06
CPCC23C24/106C23C14/0641C23C14/0036C23C28/30C23C28/321C23C28/34
Inventor 肖辉肖文甲谢盼康海燕
Owner FOSHAN UNIVERSITY