JPS58159993A - Welding material - Google Patents

Abstract

PURPOSE:To provide a welding material which is highly wear resistance and erosion resistance and has good fluidity by contg. respectively prescribed ratios of Cr, Nb, Mo and B, as essential components and consisting of the balance substantially Ni. CONSTITUTION:A welding material which contains, by weight, 10-45% Cr, 3- 15% Nb, <=20% Mo, and 0.01-2.0% B as essential components, and consisting of the balance substantially Ni. Part of the above-described component Nb may be substd. with Ta. Part of the Ni may be substd. with Fe and part of the Mo with W. This welding material has the above-described characteristics, and can be made into the welding material having excellent build-up weldability by casting the same into desired shapes such as welding rods, plates, etc. Blowholes and slag inclusion are minimized in weld zones and the sound weld zones are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Summary of the Invention] The present invention relates to a welding material, and more particularly to a welding material that has excellent wear resistance, erosion resistance, and good melt flow.

[Technical background of the invention and its problems]

Conventionally, it has been used as a material for the seven parts of pulp used in various grand minute hands such as chemical and atomic couplants, parts of jet pumps, and sliding GM materials for various machines.
In order to impart erosion resistance properties, Co
-Cr-N1-W alloy (commonly known as stellite) is welded.

However, recently, from the viewpoint of depletion of Co resources, reaction control in chemical plants, and safety improvement in nuclear couplants, N is being replaced with
A welding material based on No. 1 has been developed.

However, conventionally known Ni-based alloys do not have sufficient properties in terms of wear resistance and corrosion resistance compared to Co-based Stellite K.

[Purpose of the invention]

The present invention aims to provide a N1-based alloy welding material that has excellent wear resistance, erosion resistance, and good melt flow in place of the conventionally used Co-based alloy welding material.

[Watching the invention]

The welding material of the present invention contains 10 to 45% by weight of Cr, Nb3
~I! Weight%, Mo 2031iii% or less, B O,
01 to 2.0% by weight is an essential component, and the remainder is substantially N.
It is characterized by consisting of i.

In the WI contact material of the present invention, NL is a balance component. In addition, Crti is an essential component for corrosion resistance and strengthening of the material base, and its content is 10% by weight.
If it is less than 45, the above effect will be insufficiently exhibited;
If the weight is exceeded, coarse primary crystal phases will precipitate excessively during welding, making it impossible to obtain the desired wear resistance and erosion resistance. N
It is a component that reacts with bFiNi and contributes to strengthening the material base, abrasion resistance, and erosion resistance, but if its content is less than 3% by weight, the effect is not sufficient; Exceeding this results in a decrease in toughness and impairs the mechanical strength of the material. Moki is a component that contributes to improving corrosion resistance and strengthening the material base to improve abrasion resistance and erosion resistance, but when its content exceeds 26% by weight, it reduces the toughness of the material. In addition, B is a component that contributes to improving the flowability and strengthening the material base during welding of materials, but if its content is less than 0.01wtJ1%, the effect will not be sufficiently exhibited. Moreover, if the content exceeds 2% by weight, the toughness of the material will be reduced.In the welding material of the present invention constructed as described above, part of the welding material can be replaced with TJI.

t*, a part of Ni may be replaced with Fe, and a part of Mo may be replaced with W. Moreover, even if it contains Mn, Si, etc. as a deoxidizing/desulfurizing agent with a degree of 2.0 filtration as in conventional welding materials, no problems will occur.

[Embodiments of the invention]

Example 1 Materials having the compositions (wt%) shown in Table 1 were prepared. These were melted in a high frequency vacuum induction melting furnace to form a molten metal.

One end of a quartz tube with an inner diameter of 4+u+s and a length of 1000 wi was immersed in each molten metal, and the other end was set at 0.1 atmosphere and the molten metal was sucked in to obtain 01l JIP keyaki. Table 1 shows the length of each welding rod corresponding to each material. The longer this length,
Indicates good flowability.

These welding rods were then used to perform overlay welding on a 5US316 stainless steel plate according to a conventional method, and the welded portion was subjected to an erosion resistance test and an abrasion test. The test method for each characteristic was as follows: - Soaked.

O Painter p-john test: Bamboo bite erosion test using ultrasonic vibration method, which is based on the school line method [98th Committee Cavity Section ★, 19th Hippopotamus Corrosion Prevention Discussion Gold (
1972) 3K for 3 hours. The amount of wear at this time is calculated by dividing the weight loss (nominal) of the test piece by the test time (minutes) and density (II/m) by 1×1.
It is a numerical value multiplied by 01, and represents the volume reduction lid per unit time.

- Wear test: A test using Amsler 11, with a test load of 30 IKli and a sliding wear distance of 1000 m1 lubricant water (l cc /sec). The amount of wear in Table 111 represents the amount of weight loss (■) of the test piece.

The above results are listed together in a table.

In addition, welded the stainless steel plate with the welding rod of sample 1,
The wear resistance and erosion resistance of the weld should not deteriorate even if this weld is heated and rapidly cooled to 1050°C and subjected to a prescribed solution treatment to remove the thermal effects during welding of steel plates. was confirmed.

Alternatively, the welding rod of sample 2 may be used to overlay a carbon plate, the welded portion may be further heated and rapidly cooled to 650°C, and a prescribed strain relief annealing may be performed to remove the thermal effects during welding of the steel plate. It was confirmed that the wear resistance and erosion resistance of the welded part did not deteriorate.

〔Effect of the invention〕

As is clear from the above explanation, the welding material of the present invention: 1) has low wear and tear, has excellent wear resistance and erosion resistance, and 2) has good flowability for welding rods, rice, etc. It can be cast into any shape to create a welding material with excellent tactile weldability, ■Also, it reduces pores and entrainment phenomena in the weld, resulting in a sound weld.■
The wear resistance and erosion resistance of the welded part will not deteriorate even with austenitizing treatment, tempering treatment, etc. performed to remove the effects of heat applied during welding to carbon steel plates, etc.
(2) Furthermore, since it does not contain Co, it is effective when applied to sliding members such as chemical and nuclear power plants, Gran F, etc., and its industrial value is great.

eagle -45'

Claims (1)

[Claims] Chromium 10-45% by weight, niobium 3-15% by weight, molybdenum 20% by weight or less, lron 0.01-2.0% by weight.
A welding material characterized in that the essential component is nickel, and the remainder consists essentially of nickel.