Method for welding a case hardened component
US-9669485-B2 · Jun 6, 2017 · US
Method for welding a case hardened component
US10213865B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10213865-B2 |
| Application number | US-201715486489-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 13, 2017 |
| Priority date | Aug 23, 2013 |
| Publication date | Feb 26, 2019 |
| Grant date | Feb 26, 2019 |
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- Title
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Abstract
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A method for producing a welded part from two components, where at least one of the components has a hardened surface. The method can include case hardening the surface of one of the components using a salt bath nitriding process and then welding the case hardened first component to the second component by gas metal arc welding (GMAW).
First claim
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What is claimed is: 1. A method for producing a welded part comprising a first component welded to a second component, the method comprising: case hardening the surface of the first component by a salt bath nitriding process; and after case hardening the surface of the first component, welding the case hardened first component to the second component by a gas metal arc welding process using an aluminum-bronze wire electrode. 2. The method of claim 1 , wherein the weld between the first and second components is substantially free of porosity and the surface hardness of the first component in the vicinity of the weld is substantially undiminished. 3. The method of claim 1 , wherein the gas metal arc welding process comprises using a shielding gas comprising argon. 4. The method of claim 1 , wherein the first component comprises steel. 5. The method of claim 4 , wherein the second component comprises steel. 6. The method of claim 1 , and further comprising at least one of grinding or stamping the first component prior to case hardening the surface of the first component. 7. The method of claim 1 , wherein the first component comprises a spin tube and the second component comprises a gear case cover. 8. The method of claim 1 , wherein the welded part comprises a welded part for a clothes washing machine. 9. The method of claim 1 , wherein the welded part comprises a welded part for an appliance. 10. A method for producing a welded part comprising a first component welded to an unnitrided second component, the method comprising: case hardening the surface of the first component by a salt bath nitriding process; and after case hardening the surface of the first component, welding the case hardened first component to the unnitrided second component by a gas metal arc welding process using an aluminum-bronze wire electrode. 11. The method of claim 10 , wherein the weld between the first component and the unnitrided second component is substantially free of porosity and the surface hardness of the first component in the vicinity of the weld is substantially undiminished. 12. The method of claim 10 , wherein the gas metal arc welding process comprises using a shielding gas comprising argon. 13. The method of claim 10 , wherein the first component comprises steel. 14. The method of claim 13 , wherein the unnitrided second component comprises steel. 15. The method of claim 10 , and further comprising at least one of grinding or stamping the first component prior to case hardening the surface of the first component. 16. The method of claim 10 , wherein the first component comprises a spin tube and the unnitrided second component comprises a gear case cover. 17. The method of claim 10 , wherein the welded part comprises a welded part for a clothes washing machine. 18. The method of claim 10 , wherein the welded part comprises a welded part for an appliance. 19. A method for producing a welded part for a clothes washing machine comprising a first appliance component welded to an unnitrided second appliance component, the method comprising: case hardening the surface of the first appliance component by a salt bath nitriding process; and after case hardening the surface of the first appliance component, welding the case hardened first appliance component to the unnitrided second appliance component by a gas metal arc welding process using an aluminum-bronze wire electrode. 20. The method of claim 19 , wherein the first appliance component comprises a spin tube and the unnitrided second appliance component comprises a gear case cover.
Assignees
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Classifications
of ferrous surfaces · CPC title
Cu as the principal constituent · CPC title
Al as the principal constituent · CPC title
mainly containing noble gases or nitrogen · CPC title
Surface hardening · CPC title
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Frequently asked questions
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- What does patent US10213865B2 cover?
- A method for producing a welded part from two components, where at least one of the components has a hardened surface. The method can include case hardening the surface of one of the components using a salt bath nitriding process and then welding the case hardened first component to the second component by gas metal arc welding (GMAW).
- Who is the assignee on this patent?
- Whirlpool Co
- What technology area does this patent fall under?
- Primary CPC classification B23K9/235. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 26 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).