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Alloy powder for die steel laser cladding remanufacturing and preparation method of alloy powder

A technology of alloy powder and laser cladding, which is applied in the coating process and coating of metal materials, can solve the problems of large difference in expansion coefficient, uncontrollable cracking, uneven mixing, etc., to meet temperature resistance and improve surface performance , Improve the effect of mechanical properties

Inactive Publication Date: 2019-09-17
CHANGSHAN SHUANGMING BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These mixed powders have problems such as uneven mixing, poor fluidity, and large differences in expansion coefficients, which lead to uncontrollable defects such as cracking, porosity, white mouth, segregation, unstable performance, and difficult machining in actual cladding.
It is urgent to develop an alloy powder with moderate price, high temperature hardness, fatigue resistance, good oxidation resistance, and convenient machining, which is specially used for laser cladding and solves the problem of optimal cladding material in the remanufacturing process of 4Cr5Mo3V molds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Alloy powder for laser cladding and remanufacturing of mold steel, the composition of the alloy powder by weight percentage is: 0.45-0.60% C, 4.20-8.50% Co, 3.20-4.80% Cr, 1.20-3.35% Mo, 0.60-2.40% Mn, 0.40-0.85% Nb, 0.50-2.40% Si, 0.8-3.2% B, 0.01-0.03% Y 2 o 3 , 0.01-0.03% La 2 o 3 , P≤0.035%, S≤0.025%, the balance Ni.

[0018] A method for preparing alloy powder for laser cladding and remanufacturing of die steel, comprising the following steps:

[0019] Step 1, firstly mix 0.45-0.60%C, 4.20-8.50%Co, 3.20-4.80%Cr, 1.20-3.35%Mo, 0.60-2.40%Mn, 0.40-0.85%Nb, 0.50-2.40%Si by weight percentage, 0.8-3.2% B, 0.01-0.03% Y 2 o 3 , 0.01-0.03% La 2 o 3 , P ≤ 0.035%, S ≤ 0.025%, and the remaining Ni is placed in an intermediate frequency induction furnace, heated to 1500-1600 ° C under a nitrogen atmosphere, so that the powder is completely melted and mixed evenly to obtain molten metal;

[0020] Step 2. Inject the molten metal flow into the leaky pot of the water atomi...

Embodiment 2

[0024] Alloy powder for laser cladding and remanufacturing of mold steel, the composition of the alloy powder by weight percentage is: 0.45%C, 4.20Co, 3.20%Cr, 1.20%Mo, 0.60%Mn, 0.40%Nb, 0.50%Si, 0.8 %B, 0.01%Y 2 o 3 , 0.01% La 2 o 3 , P≤0.035%, S≤0.025%, the balance Ni.

[0025] A method for preparing alloy powder for laser cladding and remanufacturing of die steel, comprising the following steps:

[0026] Step 1, first by weight percentage 0.45%C, 4.20Co, 3.20%Cr, 1.20%Mo, 0.60%Mn, 0.40%Nb, 0.50%Si, 0.8%B, 0.01%Y 2 o 3 , 0.01% La 2 o 3 , P ≤ 0.035%, S ≤ 0.025%, and the remaining Ni is placed in an intermediate frequency induction furnace, heated to 1500-1600 ° C under a nitrogen atmosphere, so that the powder is completely melted and mixed evenly to obtain molten metal;

[0027] Step 2. Inject the molten metal flow into the leaky pot of the water atomization equipment. A water atomization nozzle is placed under the leaky pot. When the molten metal flows through the div...

Embodiment 3

[0031] Alloy powder for laser cladding and remanufacturing of mold steel, the composition of the alloy powder by weight percentage is: 0.60%C, 8.50%Co, 4.80%Cr, 3.35%Mo, 2.40%Mn, 0.40-0.85%Nb, 2.40% Si, 3.2%B, 0.03%Y 2 o 3 , 0.03% La 2 o 3 , P≤0.035%, S≤0.025%, the balance Ni.

[0032] A method for preparing alloy powder for laser cladding and remanufacturing of die steel, comprising the following steps:

[0033] Step 1, firstly mix 0.60%C, 8.50%Co, 4.80%Cr, 3.35%Mo, 2.40%Mn, 0.40-0.85%Nb, 2.40%Si, 3.2%B, 0.03%Y by weight percentage 2 o 3 , 0.03% La 2 o 3 , P ≤ 0.035%, S ≤ 0.025%, and the remaining Ni is placed in an intermediate frequency induction furnace, heated to 1500-1600 ° C under a nitrogen atmosphere, so that the powder is completely melted and mixed evenly to obtain molten metal;

[0034] Step 2. Inject the molten metal flow into the leaky pot of the water atomization equipment. A water atomization nozzle is placed under the leaky pot. When the molten metal f...

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Abstract

The invention discloses alloy powder for die steel laser cladding remanufacturing and a preparation method of the alloy powder. The alloy powder comprises the following components of, in percentage by weight, 0.45%-0.60% of C, 4.20%-8.50% of Co, 3.20%-4.80% of Cr, 1.20%-3.35% of Mo, 0.60%-2.40% of Mn, 0.40%-0.85% of Nb, 0.50%-2.40% of Si, 0.8%-3.2% of B, 0.01%-0.03% of Y2O3, 0.01%-0.03% of La2O3, less than or equal to 0.035% of P, less than or equal to 0.025% of S and the balance Ni. According to the alloy powder for die steel laser cladding remanufacturing and the preparation method of the alloy powder, the crack resistance, the formability, the process stability and the component uniformity of the alloy powder in the laser cladding process can be improved, the high-temperature mechanical property of 4Cr5Mo3V die steel is improved, the service life of the 4Cr5Mo3V steel is prolonged, and the economical efficiency is good.

Description

technical field [0001] The invention relates to the scientific and technical field of alloy powder materials, in particular to alloy powder for laser cladding and remanufacturing of mold steel and a preparation method thereof. Background technique [0002] 4Cr5Mo3V die steel is used to manufacture forging dies such as forming punches and bottom cutting punches with large impact loads, hot extrusion dies, and precision forging dies. It is a representative steel grade with excellent performance in hot work die steels. However, the 4Cr5Mo3V mold steel itself has high carbon content, so its weldability is poor. When 4Cr5Mo3V is surfacing welded by traditional welding technology, due to the large amount of heat input, a large number of white spots are prone to appear in the weld, fusion zone and heat-affected zone. Mouth and hardened organization. Choosing the appropriate remanufacturing process and alloy material is the key to remanufacturing 4Cr5Mo3V molds. [0003] Laser cla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08C22C19/05C23C24/10
CPCB22F1/0003B22F9/082C22C19/057C23C24/103B22F2009/0848
Inventor 王玉江徐小俊张峻巍周文娟白雪林余兴田刘辉张兴平季金伟
Owner CHANGSHAN SHUANGMING BEARING
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