FIELD: metallurgy; heat treatment of martensitic precipitation-hardening steels.
SUBSTANCE: proposed method may be used for production of parts working in acid media under load not below 0.8 of 517 Mpa in Northern regions. Proposed method enhances level of plastic characteristics and impact strength at negative temperatures. During heat treatment of martensitic precipitation-hardening steels, they are subjected to hardening at temperature of 900-1000 C continued during 1 h and two-stage double aging at temperature of from 650 C and not above 675
20 C and at temperature of 620 C
10 C; operation at each stage is continued for 4 h as minimum.
EFFECT: enhanced resistance to hydrogen sulfide cracking of parts.
2 cl, 2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR APPLYING WEAR-RESISTANT AND CORROSION-RESISTANT SURFACED LAYER ON ALLOY- AND HIGH-ALLOY STEELS | 2005 |
|
RU2309989C2 |
| METHOD OF HEAT TREATMENT OF AUSTENITIC PRECIPITATION-HARDENING STEEL | 2001 |
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| CORROSION-RESISTANT HIGH-STRENGTH STEEL | 2012 |
|
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| METHOD OF THERMAL TREATMENT OF LOW-CARBON MARTENSITE-AGED STAINLESS STEELS | 0 |
|
SU779415A1 |
| AUSTENITE DISPERSE-HARDENING HIGH STRENGTH STEEL RESISTANT TO HYDROGEN SULPHIDE CRACKING UNDER STRESS | 2009 |
|
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| HEAT TREATMENT METHOD OF CORROSION-RESISTANT MARTENSITE-AGING STEELS | 2013 |
|
RU2535889C1 |
| METHOD OF HEAT TREATMENT OF ROLLED PRODUCTS MADE OF LOW-CARBON, LOW-ALLOYED STEEL | 1999 |
|
RU2148660C1 |
| PRECIPITATION HARDENING STEEL (VERSIONS) AND ITEM OUT OF STEEL (VERSIONS) | 2007 |
|
RU2383649C2 |
| METHOD OF HEAT TREATMENT OF STRUCTURES | 1997 |
|
RU2129166C1 |
| HIGH-ALLOY SECONDARY-HARDENING STEEL THERMAL TREATMENT METHOD | 0 |
|
SU991518A1 |
