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Welding wire, preparation method thereof and method for reinforcing hot-working die material surface by using welding wire

A technology of hot work die and welding wire, applied in welding/cutting medium/material, welding equipment, manufacturing tools, etc., can solve the problems of decarburization and softening of carbon alloyed steel, insufficient performance, etc., to improve the microstructure and properties, high temperature mechanical properties Good, improve the effect of service life

Active Publication Date: 2016-07-06
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a welding wire and its preparation, as well as a method for using the welding wire to strengthen the surface of the hot-working mold material, wherein the composition and proportion of the key pre-designed welding wire , especially the composition and ratio of the alloy powders that make up the raw materials for welding wire drawing are improved, so that the welding wire can be especially applied to the strengthening of the working surface of hot working mold materials. Insufficient high-temperature working performance on the surface of the mold, and carbon alloyed steel is prone to decarburization and softening and other structural deterioration phenomena under high-temperature conditions for a long time

Method used

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  • Welding wire, preparation method thereof and method for reinforcing hot-working die material surface by using welding wire

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Embodiment 1

[0035] The welding wire in this embodiment satisfies: the welding wire includes iron element accounting for 85.2%-89% of the welding wire mass, and includes chromium element accounting for 5.71%-6.98% of the welding wire mass, 0.86%-1.52% carbon element, 1.16% ~1.63% manganese, 0.56%~0.84% ​​vanadium, 0.55%~1.0% niobium, 1.39%~1.63% molybdenum, 0.5%~1.1% silicon and 0.08%~0.1% nitrogen element.

[0036] The alloy powder used in this embodiment consists of 46wt% high-carbon ferrochromium, 6.5wt% electrolytic manganese, 4wt% ferrosilicon, 13.5wt% molybdenum iron, 4.5wt% chromium nitride, which account for the total mass of the alloy powder. Composition of iron powder; the above ratio is based on the composition of commonly used hot work die steel H13 steel, optimized and obtained by adding nitrides. In the specific preparation process of alloy powder, the powders of various components are firstly weighed according to the above ratio, and then these powders are sieved (the mesh ...

Embodiment 2

[0043] Similar to Example 1, the welding wire suitable for strengthening the surface of the hot work mold material can also adopt the following proportions: the welding wire includes chromium element accounting for 5.95% of the welding wire mass, 1.11% carbon element, and 1.2% manganese element, 0.6% vanadium element, 0.6% niobium element, 1.50% molybdenum element, 0.6% silicon element and 0.08%-0.1% nitrogen element, and the balance is iron element.

Embodiment 3

[0045] Similar to Example 1, the welding wire suitable for strengthening the surface of the hot-working mold material can also adopt the following proportions: the welding wire includes 5.71% of chromium, 1.4% of carbon, and 1.2% of manganese that account for the weight of the welding wire element, 0.8% vanadium element, 0.6% niobium element, 1.5% molybdenum element, 0.8% silicon element and 0.08% nitrogen element, and the balance is iron element.

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Abstract

The invention discloses a welding wire, a preparation method thereof and a method for reinforcing the hot-working die material surface by using the welding wire. The welding wire comprises, by mass, 85.2-89% of iron elements, 5.71-6.98% of chromium elements, 0.86-1.52% of carbon elements, 1.16-1.63% of manganese elements, 0.56-0.84% of vanadium elements, 0.55-1.0% of niobium elements, 1.39-1.63% of molybdenum elements, 0.5-1.1% of silicon elements and 0.08-0.1% of nitrogen elements. Through the improvement on the predesigned components and proportion of the welding wire, especially components and proportion of alloy powder forming a welding wire drawing material, the welding wire is particularly applicable to reinforcement of the hot-working die material working surface, and the high-temperature working performance of the hot-working die surface is improved.

Description

technical field [0001] The invention belongs to the technical field of metal material surface, and more specifically, relates to a welding wire and its preparation, and a method for using the welding wire to strengthen the surface of a hot-working mold material, wherein the method for using the welding wire to strengthen the surface of a hot-working mold material is based on gas protection Welding, especially suitable for strengthening and modifying the surface of hot work molds. Background technique [0002] Under the action of high temperature, high pressure and cyclic stress during the service period of hot work die materials, thermal fatigue surface cracks and high temperature wear on the working surface are the main forms of die failure, accounting for 80% of all failed dies, and the cost of die preparation is very high (materials and processing), long production cycle (usually several months), greatly reduces the performance and life of the mold. In order to improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23P15/24
CPCB23K35/3086B23K35/40B23P15/24
Inventor 陈颖吴甲民余圣甫史玉升李昱
Owner HUAZHONG UNIV OF SCI & TECH
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